Biolage Smoothproof 6-in-1 Professional Hair Serum

Humidity makes your hair act up? This one shuts it down without feeling like grease central. It smooths, adds shine, and chills the frizz without flattening volume. Avocado oil gives it that soft-touch finish, grape seed kicks in for polish. If you're heat styling daily, this one’s a keeper. Doesn’t fix split ends (nothing does), but fakes it really well. Use on damp hair after shampoo and conditioner. Start mid-length and run through the ends — skip the scalp. Can be layered with leave-ins or heat protectants. Blow dry or air dry as usual. Reapply on dry strands to tame flyaways or boost shine.