There are many signs and symptoms of testosterone deficiency in both men and women.


Muscle wasting

Abdominal weight gain




Decreased libido

Erectile dysfunction

Loss of drive and ambition

Joint pains and stiffness


Muscle wasting

Weight gain


Dry, thin skin

Low self-esteem

Loss of libido

Decreased quality of orgasm

Bone loss

Sagging skin

There are many positive effects and health improvements from testosterone therapy including:


Improved energy

Better concentration

Less irritability and depression

Muscle building

Fat loss

Increased libido and sexual function

Improved sleep

Decreases risks for heart disease, Alzheimer’s, diabetes, and osteoporosis


Increased sense of well-being

Improved libido and sexual function

Increased muscle mass

Stronger bones

Better memory

More decisive and mentally sharper

Improved skin quality

Decreases risks for heart disease, diabetes, obesity, Alzheimer’s, and osteoporosis

Testosterone supplementation in women is very important to improve or reverse the above issues, but also is crucial in disease prevention.   Multiple scientific studies repeatedly show testosterone in women can help prevent heart disease, Alzheimer’s dementia, and osteoporosis.   Testosterone is safe and effective, while quite easy to use.  For most women, a simple once per day application of a testosterone cream raises blood levels to optimal ranges and safely bypasses the liver (oral testosterone or its derivatives is not safe to be taken orally for any reason).

Testosterone supplementation in men is more complex than for women.  The metabolism of testosterone to dihydrotestosterone (DHT) and estradiol`plays important roles in the safety and efficacy of testosterone restoration therapy (TRT).  In inexperienced hands, these metabolites can interfere with achieving the health benefits of TRT, while also may play a role in possible side effects.  There are four ways of taking testosterone: oral, transdermal, intramuscular, and pellet therapy.  Dr. Hammer almost exclusively prescribes once-weekly testosterone injections for his male patients.  This method has proven to be the most reliable, least expensive, safest, and easiest.   The injection is easily done by the patient himself or a loved one with minimal time and discomfort.

A quick note on the other methods:

Oral testosterone is toxic and never should be an option

Pellet therapy is in its infancy and has not panned out yet to be as convenient and efficacious as first thought

Transdermal testosterone often has inconsistent absorption patterns, can be messy, is dangerous by contact to young children and pregnant women, and very expensive


Properly done, TRT in both men and women has been repeatedly shown to be safe.  There is no scientific evidence that testosterone causes prostate cancer or heart disease.  To the contrary, there is overwhelming scientific evidence that testosterone protects against heart disease, diabetes, obesity, and Alzheimer’s dementia.  However, if you already have prostate cancer, there is a possibility that TRT may accelerate the cancer’s growth and is, therefore, contraindicated.  In women, side effects of acne, unwanted hair growth, or deepening voice, can easily be avoided with proper dosing, frequent lab monitoring, and follow-up visits as is done at the Hammer Institute.