L-Serine is widely used in the pharmaceutical industry as a key ingredient in parenteral nutrition solutions, especially for patients who cannot obtain sufficient nutrients through oral intake. It supports protein synthesis and is vital for proper metabolic function.

In cell culture and biotechnology, L-Serine is added to growth media to support the proliferation of mammalian cells, including those used in the production of monoclonal antibodies and vaccines. Its role as a precursor for other amino acids like glycine, cysteine, and D-serine makes it essential in metabolic pathways, including the synthesis of neurotransmitters.

L-Serine is also used in skincare products due to its moisturizing properties. It helps maintain skin hydration and supports the skin’s natural barrier function, making it common in formulations for dry or sensitive skin.

Additionally, research is exploring its potential therapeutic role in neurological disorders, such as ALS (Amyotrophic Lateral Sclerosis), as it is involved in the synthesis of sphingolipids and neurotransmitters in the central nervous system.