Boots Ingredients Repair Serum With Niacinamide 50 ml. Great for damaged and dry hair. What is it? This light weight serum contains niacinamide and plant protein which works to help protect hair against breakage. What is it good for? – Helps to reduce frizz and improves the appearance of split ends – Hair feels soft and strong whilst looking smooth – Hair looks healthier with improved manageability – 100% Vegan How to use: Use as part of your styling routine: Dispense a pea size amount into the palm of your hand Massage hands together and work through wet or dry hair, focusing on ends up to mid lengths, add more if desired. Leave on and style as usual. Use once or twice a week. Avoid contact with eyes.