Hyaluronic acid is a natural substance found in the human body and has the ability to retain water, which helps to keep the skin hydrated and supple. Mgd Hyaluronic Acid 120 Mg is a supplement in capsule form containing hyaluronic acid for oral intake. It is used to improve skin hydration and elasticity, reduce wrinkles and fine lines, and promote a more youthful appearance. It can also benefit the health of nails and hair.