Best Vegan Hair Brands: Function of Beauty Function of Beauty makes custom-made hair, body, and skin-care products that are formulated just for you. While you can pick and choose what goes into your products, all of the ingredients are vegan and cruelty-free. The Function of Beauty Wavy Hair Shampoo (£12) will keep wavy hair strong and animal-lovers happy. Image Source: cultbeauty.co.uk Function of Beauty Wavy Hair Shampoo £12 from cultbeauty.co.uk Buy Now