@mk_pwr's hair loss and steroid cycle claims, fact-checked

What does this Instagram video actually claim?

This post from @mk_pwr tells men using anabolic steroids why they're losing hair. The creator says testosterone itself isn't the problem, but rather an enzyme called 5-alpha reductase that converts it to DHT, which he claims is "5x stronger" and destroys hair follicles.

He also argues that estrogen protects hair, so crashing estradiol levels with aromatase inhibitors (AIs) speeds up hair loss. The post promises four solutions but cuts off after the first point.

Does the DHT science check out?

The basic mechanism is correct. The enzyme 5-alpha reductase does convert testosterone to dihydrotestosterone (DHT), and DHT does cause androgenic alopecia (male pattern baldness).

But that "5x stronger" claim is misleading. DHT has about 2-3 times higher binding affinity for androgen receptors than testosterone, according to studies like Grino et al. (Endocrinology, 1990). The creator's exaggerating the potency difference.

The hair follicle destruction part is accurate though. DHT binds to receptors in genetically susceptible follicles and gradually miniaturizes them until they stop producing terminal hairs.

What about estrogen's protective effects?

This is where the creator gets something genuinely useful right. Estradiol does have protective effects on hair growth, though the mechanism isn't fully understood.

Studies like Ohnemus et al. (American Journal of Pathology, 2006) show that estrogen can prolong the anagen (growth) phase of hair cycles and may counteract some androgenic effects on follicles. When steroid users crash their estradiol with excessive AI use, they lose this protection.

The advice to keep estradiol "in normal range, not at zero" is solid harm reduction for people already using steroids.

What's missing from this advice?

The post doesn't mention that genetic predisposition matters more than anything else. You can't lose hair you weren't genetically programmed to lose, regardless of DHT levels.

It also skips over the fact that finasteride, a 5-alpha reductase inhibitor, can reduce scalp DHT by about 70% according to Drake et al. (Journal of Clinical Endocrinology & Metabolism, 1999). But finasteride during steroid cycles creates its own complications.

The incomplete nature of the post is frustrating. Promising "4 things you can do" and then cutting off feels like engagement bait rather than genuine education.

Should you trust hair loss advice from fitness influencers?

@mk_pwr demonstrates better understanding of hormone interactions than most fitness content, but incomplete advice on complex medical topics isn't helpful.

If you're experiencing hair loss, whether from steroid use or natural causes, you need proper evaluation. Dermatologists can determine if you're actually dealing with androgenic alopecia versus other causes like telogen effluvium or nutritional deficiencies.

The harm reduction approach of maintaining physiological estradiol levels is reasonable for people already committed to steroid use, but this shouldn't be interpreted as medical guidance.