Hormone replacement therapy (HRT) of the female-to-male (FTM) type is a form of hormone therapy and sex reassignment therapy that is used to change the secondary sexual characteristics of transgender and transsexual people from feminine (or androgynous) to masculine. It is one of two types of HRT for transgender and transsexual people (the other being male-to-female), and is predominantly used to treat transgender men. Some intersex people also receive this form of HRT, either starting in childhood to confirm the assigned sex or later if the assignment proves to be incorrect.

The purpose of this form of HRT is to cause the development of the secondary sex characteristics of the desired sex, such as voice deepening and a masculine pattern of hair, fat, and muscle distribution. It cannot undo many of the changes produced by naturally occurring puberty, which may necessitate surgery and other treatments (see below). The medications used in HRT of the FTM type include, mainly, androgens (namely testosterone) and GnRH analogues.

While HRT cannot undo the effects of a person's first puberty, developing secondary sex characteristics associated with a different gender can relieve some or all of the distress and discomfort associated with gender dysphoria, and can help the person to "pass" or be seen as the gender they identify with. Introducing exogenous hormones into the body impacts it at every level and many patients report changes in energy levels, mood, appetite, etc. The goal of HRT, and indeed all somatic treatments, is to provide patients with a more satisfying body that is more congruent with their gender identity.

Several contraindications to androgen therapy exist.[1] An absolute medical contraindication is pregnancy.

Relative medical contraindications are:

Hormone therapy for transgender individuals has been shown in medical literature to be safe in adults, when supervised by a qualified medical professional.[2]

Testosterone is metabolized by the cytochrome P450 enzyme system (specifically CYP3A isoforms) in the liver. There are certain drugs that increase or decrease the activity of cytochrome P450 enzymes and may cause increased or decreased levels of testosterone:

Testosterone can also alter the effects of other drugs:

Because of these interactions, it is advised that trans men make their healthcare providers aware of their hormone therapy, when this is relevant to their treatment for other medical issues.

The terminal half-life of testosterone in blood is about 70 minutes, so it is necessary to have a continuous supply of the hormone for masculinization.

'Depot' drug formulations are created by mixing a substance with the drug that slows its release and prolongs the action of the drug. The two primarily used forms in the United States are the testosterone esters testosterone cypionate (Depo-Testosterone) and testosterone enanthate (Delatestryl) which are almost interchangeable. Testosterone enanthate is purported to be slightly better with respect to even testosterone release, but this is probably more of a concern for bodybuilders who use the drugs at higher doses (2501000mg/week) than the replacement doses used by transgender men (50100mg/week). These testosterone esters are mixed with different oils, so some individuals may tolerate one better than the other. Testosterone enanthate costs more than testosterone cypionate and is more typically the one prescribed for hypogonadal males in the United States. Testosterone cypionate is more popular in the United States than elsewhere (especially amongst bodybuilders). Other formulations exist but are more difficult to come by in the United States. A formulation of injected testosterone available in Europe and the United States, testosterone undecanoate (Nebido, Aveed)[3][4] provides significantly improved testosterone delivery with far less variation outside the eugonadal range than other formulations with injections required only four times yearly. However, each quarterly dose requires injection of 4mL of oil which may require multiple simultaneous injections. Testosterone undecanoate is also much more expensive as it is still under patent protection. Testosterone propionate is another testosterone ester that is widely available, including in the United States, Canada, and Europe, but it is very short-acting compared to the other testosterone esters and must be administered once every 2 or 3 days, and for this reason, is rarely used.

The adverse side effects of injected testosterone esters are generally associated with high peak levels in the first few days after an injection. Some side effects may be ameliorated by using a shorter dosing interval (weekly or every ten days instead of twice monthly with testosterone enanthate or testosterone cypionate). 100mg weekly gives a much lower peak level of testosterone than does 200mg every two weeks, while still maintaining the same total dose of androgen. This benefit must be weighed against the discomfort and inconvenience of doubling the number of injections.

Injected testosterone esters should be started at a low dose and titrated upwards based on trough levels (blood levels drawn just before your next shot). A trough level of 500ng/dl is sought. (Normal range for a cisgender male is 290 to 900ng/dl).

Both testosterone patches, creams and gels are available. Both approximate normal physiological levels of testosterone better than the higher peaks associated with injection. Both can cause local skin irritation (more so with the patches).

Patches slowly diffuse testosterone through the skin and are replaced daily. The cost varies, as with all medication, from country to country, it is about $150/month in the US, and about 60 Euros in Germany.

Transdermal testosterone is available throughout the world under the brand names Andromen Forte, Androgel, Testogel and Testim. They are absorbed quickly when applied and produce a temporary drug depot in the skin which diffuses into the circulation, peaking at 4 hours and decreasing slowly over the rest of the day. The cost varies, as with all medication, from country to country, from as little as $50/month to about $280/month (in US Dollars).

Transdermal testosterone poses a risk of inadvertent exposure to others who come in contact with the patient's skin. This is most important for patients whose intimate partners are pregnant or those who are parents of young children as both of these groups are more vulnerable to the masculinizing effects of androgens. Case reports of significant virilization of young children after exposure to topical androgen preparations (both prescription and 'supplement' products) used by their caregivers demonstrates this very real risk.

Implants, as subcutaneous pellets, can be used to deliver testosterone (brand name Testopel). 6 to 12 pellets are inserted under the skin every three months. This must be done in a physician's office, but is a relatively minor procedure done under local anesthetic. Pellets cost about $60 each, so the cost is greater than injected testosterone when the cost of the physician visit and procedure are included. The primary advantages of Testopel are that it gives a much more constant blood level of testosterone yet requires attention only four times yearly.

Oral testosterone is provided exclusively as testosterone undecanoate. It is available in Europe and Canada, but not in the United States. Once absorbed from the gastrointestinal tract, testosterone is shunted (at very high blood levels) to the liver where it can cause liver damage (albeit very rarely) and worsens some of the adverse effects of testosterone, like lower HDL (good) cholesterol. In addition, the first pass metabolism of the liver also may result in testosterone levels too low to provide satisfactory masculinization and suppress menses. Because of the short terminal half-life of testosterone, oral testosterone undecanoate must be administered two to four times per day, preferably with food (which improves its absorption).

In 2003 the FDA approved a buccal form of testosterone (Striant). Sublingual testosterone can also be made by some compounding pharmacies. Cost for Striant is greater than other formulations ($180210/month). Testosterone is absorbed through the oral mucosa and avoids the 'first pass metabolism' in the liver which is cause of many of the adverse effect with oral testosterone undecanoate. The lozenges can cause gum irritation, taste changes, and headache but most side effects diminish after two weeks. The lozenge is 'mucoadhesive' and must be applied twice daily.

Synthetic anabolicandrogenic steroids (AAS), like nandrolone (as an ester like nandrolone decanoate or nandrolone phenylpropionate), are agonists of the androgen receptor (AR) similarly to testosterone but are not usually used in HRT for transgender men or for androgen replacement therapy (ART) in cisgender men. However, they can be used in place of testosterone with similar effects, and can have certain advantages like less or no local potentiation in so-called androgenic tissues that express 5-reductase like the skin and hair follicles (which results in a reduced rate of skin and hair-related side effects like acne, oily skin, seborrhea, excessive body hair growth, and, in particular, male-pattern baldness), although this can also be disadvantageous in a few aspects of masculinization (specifically facial hair growth, body hair growth, and clitoral enlargement). Although many AAS are not potentiated in androgenic tissues, they have similar effects to testosterone in other tissues like bone, muscle, fat, and the voice box. Also, many AAS, like nandrolone esters, are aromatized into estrogens to a greatly reduced extent relative to testosterone or not at all, and for this reason, are associated with reduced or no estrogenic effects (e.g., gynecomastia). AAS that are 17-alkylated like methyltestosterone, oxandrolone, and stanozolol are orally active but carry a high risk of liver damage, whereas AAS that are not 17-alkylated, like nandrolone esters, must be administered by intramuscular injection (via which they act as long-lasting depots similarly to testosterone esters) but have no more risk of liver damage than does testosterone.

For the sake of clarification, it should be noted that the term "anabolicandrogenic steroid" is essentially synonymous with "androgen" (or with "anabolic steroid"), and that natural androgens like testosterone are also AAS. These drugs all share the same core mechanism of action of acting as agonists of the AR and have similar effects, although their potency, pharmacokinetics, oral activity, ratio of anabolic to androgenic effects (due to differing capacities to be locally metabolized and potentiated by 5-reductase), capacity for aromatization (i.e., conversion into an estrogen), and potential for liver damage may all differ.

Dihydrotestosterone (DHT) (referred to as androstanolone or stanolone when used medically) can also be used in place of testosterone as an androgen. The availability of DHT is limited; it is not available in the United States or Canada, for instance, but it is available in certain European countries, including the United Kingdom, France, Spain, Belgium, Italy, and Luxembourg.[5] DHT is available in formulations including topical gel, buccal or sublingual tablets, and as esters in oil for intramuscular injection.[6] Relative to testosterone, and similarly to many synthetic AAS, DHT has the potential advantages of not being locally potentiated in so-called androgenic tissues that express 5-reductase (as DHT is already 5-reduced) and of not being aromatized into an estrogen (it is not a substrate for aromatase).

In all people, the hypothalamus releases GnRH (gonadotropin-releasing hormone) to stimulate the pituitary to produce LH (luteinizing hormone) and FSH (follicle-stimulating hormone) which in turn cause the gonads to produce sex steroids. In adolescents of either sex with relevant indicators, GnRH analogues, such as leuprorelin can be used to suspend the advance of sex steroid induced, inappropriate pubertal changes for a period without inducing any changes in the gender-appropriate direction. GnRH analogues work by initially over stimulating the pituitary then rapidly desensitizing it to the effects of GnRH. Over a period of weeks, gonadal androgen production is greatly reduced. There is considerable controversy over the earliest age, and for how long it is clinically, morally and legally safe to do this. The Harry Benjamin International Gender Dysphoria Association Standards of Care permit from Tanner Stage 2, but do not allow the addition of gender-appropriate hormones until 16, which could be five or more years. The sex steroids do have important other functions. The high cost of GnRH analogues is often a significant factor.

Antiestrogens (or so-called "estrogen blockers") like aromatase inhibitors (AIs) (e.g., anastrozole) or selective estrogen receptor modulators (SERMs) (e.g., tamoxifen) can be used to reduce the effects of high levels of endogenous estrogen (e.g., breast development, feminine fat distribution) in transgender men. In addition, in those who have not yet undergone or completed epiphyseal closure (which occurs during adolescence and is mediated by estrogen), antiestrogens can prevent hip widening as well as increase final height (estrogen limits height by causing the epiphyses to fuse).

5-Reductase inhibitors like finasteride and dutasteride can be used to slow or prevent androgenic alopecia (pattern hair loss) and various other adverse androgenic symptoms (e.g., acne) in transgender men taking testosterone.[7] However, they may also slow or reduce certain aspects of masculinization, such as facial and body hair growth and clitoral enlargement.[7] A potential solution is to start taking a 5-reductase inhibitor after these desired aspects of masculinization have been established.[7]

Depo-Provera (depot medroxyprogesterone acetate, or DMPA) may be injected every three months just as it is used for contraception. Generally after the first cycle, menses are greatly reduced or eliminated. This may be useful for transgender men prior to initiation of testosterone therapy.

In those who have not yet undergone or completed epiphyseal closure, growth hormone can be administered, potentially in conjunction with an aromatase inhibitor or a GnRH analogue, to increase final height.

The main effects of HRT of the FTM type are as follows:[8]

Many transgender men are unable to pass as cisgender men without hormones. The most commonly cited reason for this is that their voice may reveal them.

Facial changes develop gradually over time, and sexual dimorphism (physical difference between the sexes) tends to increase with age. Within a population of similar body size and ethnicity:

Frequently the first sign of endometrial cancer is bleeding in post-menopausal women. Transgender men who have any bleeding after the cessation of menses with androgen therapy should have an endometrial biopsy (and possibly an ultrasound) done to rule-out endometrial cancer.

A number of skeletal and cartilaginous changes take place after the onset of puberty at various rates and times. Sometime in the late teen years epiphyseal closure (in other words, the ends of bones are fused closed) takes place and the length of bones is fixed for life. Consequently, total height and the length of arms, legs, hands, and feet are not affected by HRT. However, details of bone shape change throughout life, bones becoming heavier and more deeply sculptured under the influence of testosterone. Many of these differences are described in the Desmond Morris book Manwatching.

The psychological changes are harder to define, since HRT is usually the first physical action that takes place when transitioning. This fact alone has a significant psychological impact, which is hard to distinguish from hormonally induced changes. Most trans men report an increase of energy and an increased sex drive. Many also report feeling more confident.

While a high level of testosterone is often associated with an increase in aggression, this is not a noticeable effect in most trans men. HRT doses of testosterone are much lower than the typical doses taken by steroid-using athletes, and create testosterone levels comparable to those of most cisgender men. These levels of testosterone have not been proven to cause more aggression than comparable levels of estrogen. It is assumed that the effect of the start of physical treatment is such a relief, and decreases pre-existing aggression so much, that the overall level of aggression actually decreases.

Some transgender men report mood swings, increased anger, and increased aggressiveness after starting androgen therapy. Many transgender men, however, report improved mood, decreased emotional lability, and a lessening of anger and aggression.

During HRT, especially in the early stages of treatment, blood work should be consistently done to assess hormone levels and liver function.

Israel et al. have suggested that for pre-oophorectomy trans men, therapeutic testosterone levels should optimally fall within the normal male range, whereas estrogen levels should optimally fall within the normal female range. Before oophorectomy, it is difficult and frequently impractical to fully suppress estrogen levels into the normal male range, especially with exogenous testosterone aromatizing into estrogen, hence why the female ranges are referenced instead. In post-oophorectomy trans men, Israel et al. recommend that both testosterone and estrogen levels fall exactly within the normal male ranges. See the table below for all of the precise values they suggest.[10]

The optimal ranges listed for testosterone only apply to individuals taking bioidentical hormones in the form of testosterone (including esters) and do not apply to those taking synthetic AAS (e.g., nandrolone) or dihydrotestosterone.

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Hormone replacement therapy (female-to-male) - Wikipedia

Introduction to testosterone replacement therapy

Testosterone replacement therapy is a treatment in which additional testosterone is added to a mans body (e.g. by injecting medicines that contain testosterone), to increase the concentration of testosterone in his body. It is used to treat hypogonadism, a condition characterised by low levels of testosterone in the blood and clinical symptoms of testosterone deficiency (e.g. lack of body hair, excessive breast growth). Hypogonadism occurs when a mans testes do not produce enough testosterone, either because the testes are not working properly, or because the hypothalamus or pituitary glandin the brain are not working properly. The hypothalamus and pituitary glands produce hormones that stimulate testosterone production in the testes.

The aim of testosterone replacement therapy is to increase blood testosterone concentrations to normal levels. In doing so, it can also restore the mans sex drive and expression of male sex characteristics (e.g. deep voice, body hair).

Testosterone is one of the oldest marketed drugs and has been used in testosterone replacement therapy since the 1930s.

Testosterone replacement therapy is used to treat men who have received a definitive diagnosis of hypogonadism. In order to be diagnosed with hypogonadism, a man musthave both low blood concentrations of testosterone and clinical symptoms of deficiency (e.g. lack of body hair, breast growth). As most of the causes that underlie testosterone deficiency (e.g. testicular dysfunction) are untreatable, most men who commence testosterone replacement therapy must be treated for the rest of their lives. In men with reversible or age-related causes of testosterone deficiency, testosterone replacement therapy is not used.

Ageing men (> 40 years of age)

As men age, their testosterone levels naturally decrease in a process sometimes called andropause or male menopause. This can lead to clinical symptoms of testosterone deficiency and/or low blood testosterone levels. There is no evidence that testosterone replacement therapy is beneficial for these men.

For older men, treatments that address the conditions causing or worsening testosterone deficiency (e.g.obesity, diabetes, chronic illness) may be effective.

Chronic or transient illness or recent trauma

Testosterone replacement therapy is rarely beneficial where hypogonadism is caused by illness (e.g. diabetes) or trauma (e.g. injury to the testicles). In these cases, the illness or trauma causing testosterone deficiency should be treated.

Prostate or breast cancer

Testosterone replacement therapy is not used to treat men with breast or prostate cancer, because there is a hypothetical risk that treatment may stimulate the growth of these cancers.

Competitive athletes

Use of testosterone replacement therapy may lead to disqualification for professional athletes.

Others

Testosterone replacement therapy is not used to treat men with the following conditions:

Testosterone replacement therapy is not used totreat infertility, erectile dysfunction or non-specific symptoms.

Certain conditions require special consideration before testosterone replacement therapy is used. Tell your doctor if you have:

The goal of testosterone replacement therapy is to restore blood testosterone to normal levels. When used to treat men with hypogonadism, it may also result in other benefits, including:

Improvements in blood testosterone levels and libido generally occur within the first week of treatment, and other benefits usually occur within two months.

It is important to note that testosterone replacement therapy typically induces a strong placebo effect in the initial stages of therapy. This means that many men who are treated with testosterone notice an improvement (e.g. bettersex drive), not because of the testosterone-containing medication has improved their testosterone concentrations, but because of the psychological effect of taking it. In short, some men think testosterone therapy is working and then feel better, even though the treatment does not work. This may lead to confusion and dissatisfaction as the placebo effect of treatment diminishes.

Most adult men begin receiving replacement testosterone at a dose sufficient for restoring blood testosterone to normal levels in men aged < 40 years. In boys who have not yet reached puberty and elderly men, lower doses are usually used at the beginning to avoid excessive increases in libido or energy, which may be dangerous. Once treatment has started, the doctor will monitor the mans blood testosterone levels and symptoms, and may need to adjust the dose depending on how these change.

Testosterone can be administered in various ways, depending on the person. Most men will first receive treatment in the form of testosterone injections every two weeks. Men who cannot receive injections (e.g. those with bleeding disorders) will receive different modes of testosterone treatment. The doctor may also change the type of testosterone administered if the man is dissatisfied with thecurrenttreatment. A doctor will try to prescribe a type of testosterone therapy that suits the patient in terms of cost, response and convenience, and individuals should talk to their doctor if they have concerns about any aspects of treatment.

Injectable testosterone

Injectable testosterone is the standard and most cost-effective treatment option. It can be used in all men except those with bleeding disorders. The injection is an oil-based solution containing testosterone. It is administered by intramuscular injection. Once injected, the solution gradually releases testosterone into the bloodstream.

The standard starting dose is one injection containing 200250 mg of testosterone every 23 weeks. The dose may be reduced to as little as 100 mg in very young or old men. The quantity and frequency of the dose will be adjusted by the doctor, according to the response to treatment. Men who do not achieve adequate increases in blood testosterone may have the dose increased, while those who gain too much blood testosterone may have the dose reduced.

Testosterone injections which are administered every two weeks are known as short-acting injectable testosterones(e.g. Sustanon). While they are effective in increasing blood testosterone levels and often improve symptoms (e.g.libido, mood, energy), testosterone levels and symptoms tend to fluctuate between injections. Men using these injections may experience very high peaks intestosterone levels and a resulting increase in libido and energy in the period immediately following the injection, followed by a period of much lower blood testosterone. Long-acting injections of testosterone (e.g. Reandron), which are administered every 3 months, provide an alternative for men who experience the peaktrough effect.

Long-acting testosterone injections provide testosterone replacement for 1014 weeks.They areadministered by injection deep into the gluteal muscle. The testosterone is released gradually into the bloodstream.

For more information on long-acting testosterone injections, see testosterone undecanoate (Reandron).

Transdermal testosterone patches

Testosterone patches that adhere to the skin may also be suitable for long-term testosterone replacement therapy. However, the patches contain substances that increase the absorption of testosterone, and these cause skin irritation in up to 50% of men who use them. Some 10% of men stop using testosterone patches because of skin irritation.Men may also discontinue use because they find the patches cosmetically displeasing. They may find other transdermal methodsof administrationmore appropriate (e.g. gels, creams).

Most men require a single patch containing 5 mg of testosterone daily. The patch can be applied to the abdomen, upper arm or thigh, and should be left in place for 24 hours after application, when a new patch should be applied.

For more information on testosterone patchess, seetestosterone (Androderm).

Oral testosterone

Oral testosterone therapy (e.g. Andriol Testocaps) uses testosterone undecanoate, the only natural form of testosterone that can be absorbed when taken orally. It may be more expensive and less effective than other modes of testosterone replacement, and is therefore usually used by men who cannot use other forms of testosterone. Oral therapy may also be used to treat older men who are starting therapy, as treatment can be stopped quickly if they are diagnosed with prostate cancer.

The starting dose varies and may be as low as 40 mg daily, although men typically require 160240 mg a day, taken in 24 doses. The doctor will adjust the dose, depending on the response to treatment. Oral testosterone should be taken with food, as this increases the amount of testosterone absorbed by the body.

Testosterone implants

Testsosterone implants contain 800 mg of testosterone (usually in the form of four 200 mg pellets). They are implanted into the buttocks or abdomen, and provide testosterone replacement for around six months. Implants are replaced periodically, once symptoms of testosterone deficiency recur. Inserting the testosterone pellets is a minor surgical procedure, requiring local anaesthetic; this is the major limitation of this method of treatment. However, men using this form of testosterone replacement are usually satisfied with the method, and are more likely to continue being treated than men using other modes of testosterone replacement.

Testosterone implants are not safe for use by older men, who have an increased risk of prostate cancer. If prostate cancer is diagnosed, testosterone replacement must be stopped immediately, which cannot be done if an implant is being used. Implants are also unsuitable for young men with bleeding disorders. Another form of testosterone replacement must be used first, so that a doctor can be sure they will not have any negative reaction to testosterone, before starting this long-term mode of treatment.

For more information on testosterone implants, see testosterone(Testosterone Implants).

Testosterone gel

Testosterone gels (e.g. Testogel)contain 1% testosteronethat is absorbed through the skin. The gel is applied to the skin on the abdomen, shoulder or arm on a daily basis. The standard dose is 5 g (50 mg testosterone), although the dose may be increased to as much as 10 g daily in some men, while others will respond adequately to 2.5 g daily.

Care must be taken to ensure the gel does not come into contact with the skin of individuals other than the man being treated (e.g. sexual partners, children) for at least six hours following application, as this may cause testosterone to be transferred to the contacts skin and absorbed by their body. Absorbing testosterone may be dangerous for children and women, especially pregnant women.

For more information on testosterone gel, see testosterone (Testogel).

Testosterone cream

Andromen forte (testosterone) is a cream containing 5% testosterone. It is ideally applied to the skin of the scrotum on a daily basis. The cream can be applied to the skin of the torso, back, chest, arms and legs, although a higher dose might be required if these sites are used, as less testosterone is absorbed compared to if the cream is applied to the scrotum. The usual starting dose is 1 g of cream (5 mg testosterone), but a doctor may adjust the dose depending on how the man responds to the treatment.

As the causes of testosterone deficiency are typically irreversible, testosterone replacement therapy is usually lifelong. Men who use testosterone replacement therapywill be monitored throughout their treatment to assess their response.

To assess the mans response to treatment, levels of testosterone in his blood are usually measured three months after the start of treatment. Levels of luteinising hormone (LH) may also be measured three to six months after treatment starts, as low levels of LH indicate that the treatment is effective.

If blood tests show that testosterone replacement therapy has failed to adequately increase concentrations of testosterone in the mans blood, hypogonadism may not be the cause of the symptoms. In these cases, testosterone replacement therapy will be stopped and the doctor will start treating other conditions that may contribute to testosterone deficiency.

A doctor will monitor changes to symptoms of testosterone deficiency and side effects of the treatment. This monitoring usually occurs three and six months after treatment commences and annually thereafter. A doctor will typically examine a man for signs of:

Tests that will usually be conducted periodically include:

Testosterone replacement therapy may sometimes be combined with treatment using PDE-5 inhibitors, a medication used to treat erectile dysfunction, for men with both hypogonadism and erectile dysfunction. It should be noted, however, that testosterone deficiency is rarely associated with erectile dysfunction.

Effective testosterone therapy has numerous immediate and long term benefits. These include:

Physical

Sexual

Psychological

The side effects associated with testosterone replacement therapy are rare and vary depending on the age of the man being treated, his life circumstances and health condition. They include:

Testosterone replacement therapy increases the risk of some health conditions, including:

Read more here:
Testosterone Replacement Therapy in Men | myVMC

What is Testosterone?Testosterone is the hormone produced by the testicles. It is responsible for the proper development of male sexual characteristics. It helps promote the circulation of blood, and is responsible for the maintenance of muscle bulk. Without an adequate testosterone level there can be important psychological affects such as loss of libido, reduced brain and intellectual activity and mood changes.What causes the Andropause? As all men age there is a gradual decline in the level of testosterone. This natural decline starts after 30 and continues throughout life. By the age of 40, testosterone levels drop by 1% every year. Many men however can experience a lack of testosterone production sufficient to result in significant symptoms. This will apply to approximately 50% of men by age 55. Damaged testicles or disease will affect testosterone production as will long-term stress, smoking and excessive alcohol consumption. In 60% of cases no cause can be identified and hereditary factors are implicated. Are there any health issues associated with the Andropause? Low levels of testosterone may result in an increase in tummy and chest fat, a decline in the amount of muscle in the body and decline in strength. Low levels can also lead to Brittle bones, (osteoporosis) which may lead to hip and spinal fractures. In addition the bone marrow is less active and produces less haemoglobin and red blood cells to transport oxygen around the body.

A consultation is required and blood tests will be necessary. The blood tests include an examination for prostate cancer, as this is a contraindication to testosterone treatment. Any suspicion of prostate cancer may require further investigations. The aim of therapy is to return the blood testosterone level in the bloodstream to the normal range for the man's age. This is achieved by using bio-identical testosterone cream that is rubbed onto the skin daily.

IF YOU THINK YOU MIGHT HAVE LOW TESTOSTERONE, check out our quick online self assessment test.

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Testosterone Replacement Therapy - Men's Health