50ml. Boosts volume. Nourishes and strengthens. Prevents split ends and itchiness. Protects against heat, pollution, and UV stress. 100% vegan. CONTAINS: ,Camellia extract,Larch extract,Purslane extract,Pro-Vitamin B5,Sunflower sprouts,Tara extract,Cationic Hyaluronic Acid. HOW TO USE: ,Apply the serum directly to wet or dry scalp and to hair tips using the pipette. Massage gently. Do not rinse. For best results, use in tandem with Anti-Hair Fall shampoo.