Biotin is a B-vitamin that is also known as Vitamin H or Vitamin B7. It is important for the metabolism of carbohydrates, fats, and proteins in the body.

N-Acetyl Cysteine (NAC) is an antioxidant that helps to protect the skin from environmental stressors and free radicals. It is also known for its ability to boost the production of collagen and elastin, which can improve the overall appearance of the skin.