Testosterone Cypionate

Yes, and this is not optional. TRT requires a confirmed diagnosis of hypogonadism based on lab-verified low testosterone levels, combined with the presence of clinical symptoms. This is how the Endocrine Society guidelines define appropriate TRT candidacy — and it is also how responsible prescribing protects you. Lab work also establishes your baseline hematocrit, PSA, and estradiol before treatment begins. Obsidian Genetics coordinates lab ordering and can arrange home phlebotomy so you never have to go somewhere in person.

Most men are comfortable with self-injection within the first 1–2 attempts. Testosterone Cypionate can be administered intramuscularly (IM) into the gluteus or vastus lateralis, or subcutaneously (subQ) into the abdomen or thigh — whichever your provider recommends based on your dose and preference. Subcutaneous injection uses smaller needles and is often preferred for its ease and reduced discomfort. Your Obsidian Genetics provider will walk you through technique and answer any questions during your consultation.

Yes. Exogenous testosterone suppresses the pituitary signals (LH and FSH) that stimulate sperm production. Most men on TRT experience a significant reduction in sperm count, and some become temporarily infertile during treatment. If you are planning to father children in the near future, TRT is not the right choice without fertility planning. Consider discussing Enclomiphene — an oral medication available on this site that stimulates your body’s own testosterone production without suppressing the HPG axis, preserving fertility while raising testosterone levels.

Testosterone Cypionate is exogenous testosterone — you are replacing the hormone directly. Enclomiphene is a Selective Estrogen Receptor Modulator (SERM) that blocks estrogen receptors in the hypothalamus and pituitary, stimulating your own body to produce more testosterone naturally. TRT delivers faster, more predictable results and is appropriate for men with confirmed hypogonadism. Enclomiphene is an excellent option for men with secondary hypogonadism, men who want to preserve fertility, or men who prefer an oral over injectable approach. Many men transition between protocols over time based on life stage and goals.

When you stop TRT, your body’s natural testosterone production is suppressed and takes time to recover. The recovery period varies — for most men, endogenous testosterone returns to pre-treatment levels within 3–6 months of stopping, though recovery can take longer with prolonged TRT use. During the recovery period, symptoms of low testosterone typically return. If stopping TRT is planned, a post-cycle recovery protocol (such as Enclomiphene or clomiphene) can accelerate HPG axis recovery. Your Obsidian Genetics provider manages this transition if needed.

For men with confirmed low testosterone, TRT frequently improves mood, reduces irritability, and lifts the flat, low-motivation feeling that characterizes hypogonadism. These changes are driven by testosterone’s direct effects on the brain as well as its downstream effects on energy and sleep quality. However, mood effects are complex — if estradiol rises too high during TRT (from aromatization), some men experience mood instability or emotional changes. This is why estradiol monitoring is part of the follow-up lab panel. Properly dosed TRT with monitored estradiol is associated with positive mood outcomes in clinical data.