Biotin, or Vitamin B7 or Vitamin H, is a water-soluble vitamin that's a part of the vitamin B complex. Sunshine Nutrition's Biotin 5000 mcg Capsule is a water-soluble B vitamin that promotes healthy hair, skin, and nails. , SUGGESTED USE: As a dietary supplement for adults, take one (1) to two (2) tablets daily, preferably at mealtime, or as directed by the healthcare practitioner.