Red Light Therapy Experiment for 1) Reducing White Hair and 2) Improving Skin

#27

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#29

You can’t extrapolate this directly from rats. Humans would generally need a longer exposure time than just 2 minutes. Also as far as benefits for organs deeper in the body, like the heart, you can’t expect humans to necessarily get the same benefits. Penetration depth of the light is a much bigger problem in case of humans than rodents because humans are much larger than rodents.

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#30

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#31

I hope light therapy and skin/hair gets more attention in the coming years. There’s clearly something going on but the devices and protocols are too heterogeneous.

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#32

If nothing else it looks cool.

#33

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#34

I assume this is the source: Low-level laser therapy for the treatment of androgenetic alopecia in Thai men and women: a 24-week, randomized, double-blind, sham device-controlled trial 2018

Thai article: They have such a high rate of fraudulent articles that I wouldn’t put much confidence into it… Did other teams reproduce the finding?

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#36

Please provide scientific evidence to back your claim if “it is a scientific fact”.

Also, this is not Reddit here; we aim for a higher level of conversation.

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#37

u can google…there is no requirement for others to provide u with google scholar support dude

#38

If you don’t want to be banned, I suggest you change your behavior.

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#40

I got a rechargeable red light cap recently. Not sure what it will do for grey hair but it’s fun to just throw on a few times a day.

I’m fairly confident I’ll get a mild boost of hair growth rate. Mine already grows quickly. Wearing the cap is just a bit of fun really.

One real concern is going over the biphasic response. Basic idea being small to moderate amounts of red light exposure are beneficial but too much will either reduce the benefits or cause mild oxidative damage. I suppose I need to limit my usage. It’s so easy to just chuck this hat on 2-3x a day while doing other things. I’ve been wearing it while writing posts on Rapamycin.news this morning.

As I said earlier in this thread I did read somewhere that either red light or near infrared light actually increased greying of hair. But I also said I couldn’t find the source of this claim.

I queried Claude AI to see if it could find the study and the only thing even tangentially related to this was reduction of melasma via inhibition of melanin biosynthesis in cultured human melanocytes. This was using near infrared (NIR).

Claude:

The mechanistic wrinkle: there’s melasma-related work using cultured human melanocytes where NIR LED wavelengths via photobiomodulation were shown to inhibit melanin biosynthesis, downregulating tyrosinase, tyrosinase-related protein 1, and MITF expression through an intracellular signaling pathway. That’s a real, published melanin-suppression effect from NIR — so if you extrapolated that mechanism to a hair follicle melanocyte, you could construct a plausible “NIR could theoretically dull pigment” argument. Journal of Clinical and Aesthetic Dermatology

It is entirely possible that someone saw this, extrapolated this to occurring in hair cells and confidently made the claim without providing evidence and then I read it and it stuck in my brain.

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