Best Leave In Treatment for Frizzy Hair

Best Leave In Treatment for Frizzy Hair

The best leave in treatment for frizzy hair is the one that suits how thick your hair is and why it frizzes. Weight matters most: too heavy and fine hair goes flat, too light and thick hair still puffs up by lunch. This page brings leave in creams, lotions, milks and sprays for frizz together, so you can compare them in one place.

Why hair frizzes

Frizz is the outer layer of the hair, the cuticle, sitting open instead of lying flat. When it's open, the hair pulls moisture out of the air, each strand swells, and they all go their own way. That's why frizz gets worse on humid days, after colour or bleach, and on curly hair, which is drier along its length to begin with.

A leave in treatment stays on after you've finished in the shower, so it keeps working until your next wash. It smooths the outside of the strand and adds slip, which also makes brushing easier. Be clear on what it can't do: it makes damaged hair look and feel better, but it won't mend split ends. Only a trim does that.

How to choose by hair type

  • Fine hair: a light spray or milk. A cream will weigh fine hair down, and you swap frizz for flat, greasy ends. See our leave in treatment for fine hair picks.
  • Wavy or medium hair: a lotion or light cream. Enough to smooth, not so much that it drops the wave.
  • Curly hair: a cream, applied to soaking wet hair and scrunched in, not combed. More options in our leave in treatment for curly hair range.
  • Thick or coarse hair: a rich cream. Expect to use more than the label suggests.
  • Dry hair: if your hair feels rough as well as frizzy, it needs moisture, not just smoothing. Go for the best leave in treatment for dry frizzy hair.
  • Coloured or bleached hair: chemical work opens the cuticle, so coloured hair frizzes more. Choose from the best leave in treatment for coloured hair.

How to use it

Towel-dry first. If water is still dripping, it dilutes the product and most of it slides off. Start with a small amount, work it through the mid-lengths and ends, and keep it off the roots. Comb through so every strand gets some, then style as normal. If your hair feels coated the next day, use less before you blame the product.

Leave in or oil

A leave in and an oil do different jobs. The leave in goes on damp hair before styling. Oil goes on dry ends at the finish, to smooth flyaways. Plenty of people with frizz use both. For the finishing step, see our best hair oil for frizzy hair.

What to pair it with

A leave in works on the surface, between washes. If your hair is dry right through, add a mask once a week. The best hair mask for frizzy hair is the place to start. To see every treatment type side by side, browse our hair treatments range, or shop everything for frizzy hair for the shampoos, conditioners and styling products that go with it.

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Your Questions Answered

For most frizzy hair, a leave in treatment. It stays on after you rinse and keeps smoothing until your next wash. Match the weight to your hair: a light spray for fine hair, a cream for thick or curly hair. That one choice decides whether you've found the best leave in treatment for frizzy hair or just a heavier one. If your frizz is mild, a leave in conditioner may be all you need.

A weekly mask plus a rich leave in cream on wash days. Dry hair frizzes because it's short on moisture, so it needs both. A hydrating hair mask puts moisture back in, and the leave in smooths the cuticle so it holds on to it. Skip light sprays here, as they won't do enough on dry hair. Apply both to damp hair, mid-lengths to ends.

For home use, a keratin mask once a week, then a leave in on wash days. Keratin is a protein that fills rough spots along the strand, so hair sits smoother. A salon keratin smoothing treatment is a different thing: a stylist applies it and seals it with heat, and it suits thick, coarse frizz. Fine hair can go stiff with too much protein, so use keratin less often.