FWTS certified trichologist and founder of Advanced Trichology, William GaunitzHe previously echoed this concern, telling MBG that insufficient vitamin D can decrease scalp and hair volume throughout the body.
Considering 41% of American adults are deficient in vitamin D and about 29% are directly deficient in the sunshine vitamin, a large portion of the population would benefit from getting more vitamin D if they are looking to grow their locks.
The point is that getting enough vitamin D from only diet and sunlight is absurdly difficult (read: practically impossible). If you’re looking to promote (and maintain) healthy vitamin D levels, high-quality vitamin D supplementation is your best bet.
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