L-Serine is a non-essential amino acid, meaning it can be synthesized by the human body and is not required to be obtained through diet. It is one of the 20 naturally occurring amino acids that are the building blocks of proteins. L-Serine plays various roles in the body, including the synthesis of proteins, neurotransmitters, and phospholipids. It also contributes to the function of the central nervous system and plays a role in the formation of collagen and elastin, which are important for healthy skin, hair, and connective tissues. Additionally, L-Serine is involved in the synthesis of other amino acids such as glycine and cysteine.