Hair Loss, Acne, and Appearance on TRT

TRT does not cause hair loss directly — it accelerates androgenetic alopecia (male pattern baldness) in men who are genetically predisposed. The mechanism: testosterone converts to DHT (dihydrotestosterone) via 5-alpha reductase. DHT binds to hair follicles, miniaturizing them over time. Men with the androgen receptor gene variant are sensitive to even normal DHT levels. On TRT, DHT often rises, accelerating the process. You won't go bald from TRT if you weren't going to anyway — but you'll get there faster. MPB follows a predictable pattern (Norwood scale): temples recede, crown thins, eventually meeting in the middle. Body hair often increases on TRT (different follicle response than scalp). Some increase in body hair is normal — chest, back, shoulders.

Option 1: Finasteride (Propecia) 1mg/day — blocks ~70% of DHT production. Highly effective but carries risk of sexual side effects (5-10% of men, some persistent). Many men on TRT use finasteride successfully. Option 2: Dutasteride (Avodart) 0.5mg/day — blocks ~90% of DHT. More effective, higher side effect risk. Usually reserved for aggressive hair loss. Option 3: Topical finasteride — less systemic absorption, lower side effect risk. Compounded or brand (e.g., topical finasteride + minoxidil combinations). Option 4: Minoxidil (Rogaine) — stimulates follicles, doesn't block DHT. Best used in combination with a DHT blocker. Option 5: Ketoconazole shampoo (Nizoral) — mild anti-androgenic effect on scalp. Adjunctive, not sufficient alone. Option 6: Lower testosterone dosing — less T means less DHT substrate. Option 7: More frequent injections (smaller peaks = less acute DHT spike). Reality check: if you're destined for significant MPB, the best you can do is slow it down.

TRT acne is primarily back, shoulder, and chest acne (not facial). It's caused by increased sebum production stimulated by androgens. Acne typically peaks 3-6 months after starting TRT as hormones stabilize, then often improves. Management ladder: Step 1: Shower immediately after sweating (gym, work) — sebum + sweat + bacteria = acne. Step 2: Benzoyl peroxide wash (PanOxyl 10%) left on for 2-3 minutes in shower. Step 3: Salicylic acid body spray after shower. Step 4: More frequent injections (reduce hormone fluctuations that trigger breakouts). Step 5: Prescription topical (clindamycin, tretinoin) from dermatologist. Step 6: Low-dose isotretinoin (Accutane) 10-20mg/day — low-dose protocol is highly effective with minimal side effects vs standard high-dose. Step 7: Lower TRT dose — acne is often dose-dependent. Avoid: picking/popping, harsh scrubbing, and excessive OTC products that dry skin causing rebound oil production. Patience: most TRT acne improves after the first 6-12 months as your body adapts.

You'll gain weight initially — this is mostly water and glycogen (5-10 lbs in first month), not fat or muscle. It's normal and temporary. Actual muscle gain: starts becoming visible at 2-3 months, significant by 6 months. Without training: minimal muscle gain — TRT is not anabolic at physiological doses without stimulus. With training: enhanced recovery, better protein synthesis, modest muscle gain over baseline (5-10 lbs lean mass in first year with proper training and nutrition). Fat loss: indirect effect through improved insulin sensitivity, increased energy, and better recovery enabling more exercise. Not a direct fat burner. Body hair: increases gradually over months. Back and shoulder hair may increase significantly — genetic. Skin changes: may become oilier (first 6 months), then often normalizes. Some men report 'thicker' skin texture. These changes are gradual and highly individual — manage expectations: TRT restores normal physiology, it doesn't turn you into a bodybuilder.