Bryan Johnson· Author
A study on 44 males (age 18-49) showed that treatment with 655nm laser cap for 25 min every other day for a duration of 16 weeks resulted in a 39% increase in hair growth compared to placebo.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
A study on 44 males (age 18-49) showed that treatment with 655nm laser cap for 25 min every other day for a duration of 16 weeks resulted in a 39% increase in hair growth compared to placebo.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
It has good evidence that it's a worthwhile thing to have as part of your daily protocol.