Garnier Fructis Sleek & Shine Anti-Frizz Hair Serum

What is it and what's it for?

It's a lightweight serum applied to wet or dry hair (not rinsed out) that seals the hair cuticle so it doesn't absorb humidity from the air — that's what causes frizz. With argan oil, it leaves hair shinier without feeling greasy when used in the right amount.

Real-world use cases

• In your daily routine: You apply it to freshly washed hair, a few drops from mid-length to ends, before drying or styling — it controls frizz all day, even in humid weather.
• Professional use: A hairstylist uses it as the final step of a blowout to seal the result so it doesn't get undone by humidity during the day.

How to avoid buying the wrong one

• Use a small amount — 1 or 2 drops is enough for medium hair; too much weighs it down instead of adding shine.
• It's leave-in (not rinsed out) — it's applied as a last step, it doesn't replace your in-shower conditioner.
• It's not a deep repair treatment — if your hair is very damaged (chemically processed, brittle), you need to add a separate mask; this only controls surface frizz.