Hair Serum

Hair serums are leave-in products applied to the lengths and ends rather than the scalp. Listings cover frizz control, gloss and smoothing serums along with formulas described for use before heat styling.

What to compare

Serums are used in small amounts, so a small bottle lasts considerably longer than the volume suggests. Lighter formulas suit fine hair; richer ones suit thick or coarse hair. Check whether a listing includes heat protection if you use a dryer or straightener.

Related categories

Wash-out conditioning is listed under Conditioner, and pre-wash oils under Hair Oil.