Biolage’s SmoothProof Avocado Hair Serum is a 6-in-1 professional formula designed to tame frizz and smooth unruly hair. This lightweight serum (100ml) is infused with natural avocado and grape seed oils to deeply nourish and seal in shine. According to the official product description, it is “trusted by professionals” and its non-sticky formula “gently envelops hair to control frizz and seal in smoothness without weighing it down. In humid climates like India, where frizz can ruin your look, this serum promises salon-smooth hair every day.