Hormone
Testosterone
A hormone therapy used for confirmed testosterone deficiency and related body-composition or sexual-health symptoms.
In depth
How it works
Testosterone is the primary endogenous androgen, acting through androgen receptors across muscle, bone, brain, and reproductive tissue. Replacement therapy restores serum levels toward a normal physiological range in people with confirmed deficiency; it does not "boost" levels beyond normal in someone who is not deficient.
What the research shows
Testosterone replacement is FDA-approved specifically for confirmed hypogonadism — either primary (testicular failure) or hypogonadotropic (pituitary/hypothalamic) causes — documented through lab-confirmed low testosterone plus clinical symptoms, per FDA-approved drug labels.
The 2023 TRAVERSE trial, a study of more than 5,200 men, found no meaningful increase in major adverse cardiovascular events (heart attack, stroke) with testosterone replacement compared to placebo, which led the FDA to request removal of an earlier cardiovascular-risk limitation-of-use warning from product labels.
Safety and who should avoid it
Prescribing requires lab-confirmed deficiency, not just symptoms, and ongoing monitoring of hematocrit, PSA, and cardiovascular risk factors. Per FDA labeling, it is contraindicated in men with prostate or breast cancer and in those with untreated severe obstructive sleep apnea.
Detail
Overview
A hormone therapy used for confirmed testosterone deficiency and related body-composition or sexual-health symptoms.
Benefits, side effects, and protocols
Benefits list
Side effects
Vendor protocol
- None listed
Clinical protocol
- None listed
Evidence
- High
Regulatory
- Fda Approved
- Prescription required
Research
Mechanisms
Evidence notes
- High
Administration
Research links
Contraindications
- None listed
Components
- None listed
Regulatory data
- Fda Approved
- Prescription required
Aliases
- None listed
Used in these stacks
Related compounds
Frequently asked questions
Is testosterone replacement therapy FDA approved?
Yes, for confirmed hypogonadism (primary or hypogonadotropic), diagnosed through lab-confirmed low testosterone plus clinical symptoms — not for general age-related decline without a confirmed deficiency.
Does TRT increase heart attack or stroke risk?
The 2023 TRAVERSE trial of over 5,200 men found no meaningful increase in major adverse cardiovascular events versus placebo, prompting the FDA to request removal of the prior cardiovascular warning from product labels.
What are the side effects of testosterone therapy?
Monitored risks include elevated hematocrit (thicker blood), changes in PSA, and effects on fertility; it is contraindicated in prostate or breast cancer and untreated severe sleep apnea.
Educational reference only. Pepperz does not provide medical advice, diagnosis, treatment, prescribing guidance, or dosing recommendations. Sourcing Testosterone? Check your source before you use anything.