What it is
Valine is one of the standard amino acids found in proteins and is included in skincare as a small water-loving molecule that helps condition the skin surface. It is often part of amino-acid blends meant to support a soft, comfortable feel, sometimes echoing components of skin's own natural moisturizing factor. In sunscreens it is a supporting conditioning ingredient and does not contribute to UV protection.
Safety & warnings
Amino acids such as valine are generally well tolerated in topical products and are not typical sensitizers at cosmetic use levels.
Origin & sourcing
Can be naturally occurring or produced by fermentation or synthesis; the cosmetic-grade material is typically manufactured at high purity.
Questions everyone asks
What does valine do in skincare?
As an amino acid it acts as a conditioning, water-loving ingredient that helps the skin surface feel soft and comfortable.
Does valine provide sun protection?
No. It is a supporting skin-conditioning ingredient and has no role as a UV filter.