Hyaluronic acid is a substance that is naturally present in the human body, particularly in the skin, where it helps to keep the tissue hydrated and plump. It is a type of mucopolysaccharide, or long chain of sugar molecules, that has the ability to hold onto large amounts of water, making it an effective moisturizing agent.

When applied to the skin in the form of a topical treatment or included in a skincare product, hyaluronic acid can help to improve the skin's hydration and elasticity, giving it a plumper, smoother, and more youthful appearance.

It can also help to reduce the appearance of fine lines and wrinkles by filling in the spaces between the skin's collagen and elastin fibers, which can become more pronounced as we age.

Hyaluronic acid is suitable for all skin types, including sensitive skin, and can be used as part of a daily skincare routine to help keep the skin hydrated and healthy. It is also often used in conjunction with other ingredients, such as antioxidants and anti-aging agents, to further improve the health and appearance of the skin.