And while vitamin D is fairly well-known for its skin benefits in the beauty realm, many don’t realize that the essential vitamin is critical for hair growth as well. It goes the other way, as well: According to a 2021 review from the 1Journal of Cosmetic Dermatology1, individuals with hair growth challenges are more likely to have suboptimal vitamin D levels. Considering 41% of U.S. adults2 are insufficient in vitamin D and approximately 29%2 are straight-up deficient in the sunshine vitamin, a large chunk of the population would benefit from getting more vitamin D if they’re looking to grow out their locks. The thing is, getting enough vitamin D from diet and sunlight alone 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. mbg’s vitamin D3 potency+ features 5,000 IU of algal vitamin D3, plus an organic trio of avocado, flaxseed, and olive oils for optimized absorption, so your body is able to reap all of D’s benefits as quickly as possible.*