TB-500 and the hair growth / dark hair return claims — what's the signal-to-noise here?
30 posts
Reading various boards and the 'TB-500 darkened my gray hair' anecdotes are all over. The mechanistic story: Tβ4 has been studied in hair follicle cycling and melanocyte biology, and there are some rodent papers on follicle stem cells + Tβ4.
But the human community reports are wildly inconsistent. Some people claim dark hair return, some claim faster hair growth, most notice nothing, a few claim shedding. I've been through like 200 anecdotes this week and the only unifying thread is that people who want an anti-aging angle report one, and people running it for tendons don't mention hair at all.
What's going on here? Signal, placebo, or a third thing I'm missing?
10 Replies
212 posts
I'm a data point: 3 years of TB-500 cycles for rehab, no perceivable change in my hair. Gray at the temples has marched along on schedule. The 'dark hair return' reports feel to me like attentional bias — once you're looking for it you find wisps.
- CJC-1295 no DAC · 100 mcg · pre-bed · sub-Q
- Ipamorelin · 200 mcg · pre-bed · sub-Q
- BPC-157 · 500 mcg · 2x/day · sub-Q
117 posts
The Tβ4 + follicle story is a real research line but it's mostly wound healing adjacent — hair follicle neogenesis in the context of skin injury. Extending that to 'systemic TB-500 restores gray hair pigment in adult humans' is a large leap that nobody has actually tested.
34 posts
This is the purest placebo-adjacent effect in the peptide world. The 'dark hair return' claim is self-reported, subjective, confounded with seasonal light exposure, haircut frequency, and 'I took a new photo today and my hair looks different.' Without before/after strand-scale photography the claim is unsalvageable.
30 posts
@epi_cycler this is the kind of anecdote that makes the claim impossible to kill. Plausible mechanism + one person's wife noticing = forum legend.
38 posts
Ran TB for rehab. Wife asked if I colored my beard. I didn't. That's one data point toward 'maybe something.' Also possibly the bathroom lighting changed. I don't know.
52 posts
For what it's worth, I've run 7 TB cycles, no hair effect. People who run TB for rehab and don't think about hair don't report hair changes. People who run TB hoping for hair changes report them. Worth thinking about.
- BPC-157 · 250 mcg · 2x/day local · sub-Q
- TB-500 · 2 mg · weekly · sub-Q
17 posts
Expectancy effects in peptide self-experimentation are massive. The 'dark hair' claim is where they're most visible because the marker is slow, subtle, and self-assessed.
30 posts
Thanks everyone. My read: genuinely plausible mechanism in a narrow research context, basically unvalidated in humans, community reports are confounded by expectancy. Going to stop counting it as a reason to cycle TB.
12 posts
ran TB for like 6 weeks strictly for a shoulder thing, wasn't thinking about hair at all. halfway through my wife mentioned my temples looked darker. could be nothing, could be lighting like someone said, but i definitely wasn't looking for it so maybe that's the signal worth paying attention to. the people posting before/afters with enthusiasm seem like they're already invested in the outcome you know