An essential amino acid (a building block of skin proteins like collagen) that our body cannot produce itself but has to take from external sources, like diet. 

It's a branched chain amino acid that is claimed to enhance energy, increase endurance and aid in muscle tissue recovery and repair when taken as a supplement. It's not clear what valine does when you put it on the skin, but as all amino acids, it must be at least a great skin hydrator.

Products with Valine

Nuface Optimizing Mist Kikumasamune Skin Care Essence The Ordinary Marine Hyaluronics Ausceuticals Peptide Moisturiser Esho Drench Leaders Insolution Mediu Amino Pore-Tight Mask Minon Amino Moist Mask The Ordinary Natural Moisturizing Factors + Ha The Ordinary Amino Acids + B5 Abnomaly Petrowhat? Bali Abnomaly Petrowhat? Baobab Abnomaly Petrowhat? Milk Abnomaly Petrowhat? Rio Leaders Mediu Amino Mousture Mask The Ordinary Glycolic Acid 7% Toning Solution Institut Esthederm Eve Serum Loopha Broadleaf Forest Body Wash Nacific Glow Intensive Bubble Toner Paula's Choice Peptide Booster The Ordinary Buffet Bioderma Matricium The Ordinary Buffet + Copper Peptides 1% NIOD Survival 0 Zelens Z Balance Prebiotic & Probiotic Facial Mist Equal Beauty Super Serum Hydrantioxidant™ NIOD Survival 0 (Old Version) Stemm High-Amino Shampoo Faith in Nature Rose & Neroli Nourish & Repair Conditioner NIOD Multi-Molecular Hyaluronic Complex 2 (Mmhc2) Planet Eden Antioxidant Recovery Cream Boo Bamboo Bamboo Fiber Charcoal Sheet Mask Ciracle Super Moisture Rx Cream Paula's Choice Skincare Earth Sourced Purely Natural Refreshing Toner Scinic Peptide Ampoule 95 Martial Vivot Conditioner Mediheal N.M.F Aquaring Ampoule Mask Peter Thomas Roth Retinol Fusion Pm Moisturizer Stemm Black Fulvic Conditioner The Ordinary Mineral Uv Filters Spf 30 With Antioxidants Esho Sculpt NIOD Survival Spf 30 Stemm Gold Fulvic Conditioner Drunk Elephant Protini™ Polypeptide Cream NIOD Modulating Glucosides Paula's Choice Earth Sourced Antioxidant Enriched Natural Moisturizer Nakeup Face Ac Herb Mask Foam labo Aqua In Derm Missha Time Revolution Vitality Toner Martial Vivot Shampoo Stemm Density Stimuli