Aveda's Thickening Tonic instantly thickens your hair from roots to ends, giving it a thicker, fuller appearance. Tonic that contains 96% naturally derived ingredients expands every strand of hair for a fuller appearance. With wheat protein, it promotes hair growth, reduces irritation and repairs the scalp. Aloe vera promotes hair growth and repairs the scalp. This product is cruelty-free and vegan. This product is perfect for people with thin or thinning hair or for those who want to boost their hair.