Amino acids are the fundamental building blocks of proteins. There are 20 in total, each with a unique structure and function. Some can be produced by the body (non-essential), while others must be obtained through diet (essential). They are present in every cell of the human body and play a variety of important roles.
In the body, amino acids support tissue growth and repair, and are involved in the production of enzymes, hormones, and neurotransmitters. They are especially important for the health of the skin, hair, and nails. Additionally, amino acids help maintain proper water balance within cells and strengthen the skin’s natural defence mechanisms.
In cosmetics, amino acids are highly valued active ingredients due to their wide range of benefits for skin and hair care. They are used for their ability to deeply hydrate, restore, and soothe the skin, strengthen and protect the skin barrier and contribute to hair care. Additionally, they are commonly found in serums, masks, and exfoliants that support collagen and elastin synthesis.
The most commonly used amino acids in cosmetic products include arginine, glycine, serine, proline, alanine, and glutamic acid.