Best Leave In Treatment for Dry Frizzy Hair

The best leave in treatment for dry frizzy hair is the one that suits your hair's thickness, not the one with the longest list of promises on the bottle. Dry hair and frizzy hair are usually the same problem. When hair is short on moisture, the outer layer lifts, the strand pulls moisture from the air and swells, and that is the frizz you see on a humid day. A leave in treatment stays on after you rinse, so it keeps adding moisture and helps that outer layer lie flatter between washes. Here is how to pick one, how to use it, and when you need something else.

Pick the format for your hair

Leave in treatments come in three main forms. They all do the same basic job. The difference is weight.

• Creams and lotions are the richest. They suit thick, coarse or curly hair that soaks product up and still looks dry. On fine hair they tend to sit heavy and go flat by lunchtime.
• Sprays and mists are the lightest. They suit fine or medium hair, and most double as a detangler, which helps when dry hair knots easily. On very thick hair you may need a lot of spray to notice anything.
• Oils and serums sit on the surface. They seal the ends and add shine, but they don't add much water to the hair, so on their own they rarely fix dryness. Most people with dry frizzy hair use one over a cream or spray. If that's you, compare our hair oil for dry frizzy hair as well.

Match it to your hair type

If your hair is curly, some frizz is just how curls behave when they're thirsty. A cream that moisturises and holds the curl shape will do more than a smoothing spray. The best leave in treatment for curly hair list is built around that. If your hair is fine and goes limp with anything rich, start with our best leave in treatment for fine hair instead.

Be honest about whether your hair is dry or damaged. Dry hair feels rough but still stretches and springs back. Damaged hair snaps, splits and won't hold a style, usually after bleach, a lot of colour or years of hot tools. A moisture treatment won't rebuild that. Look at the best leave in treatment for damaged hair, and book a trim for the split ends, because no treatment glues them back together.

If your hair isn't dry at all and only frizzes when the weather turns, you don't need more moisture. You need something lighter that helps hair hold its shape in humidity. The leave in treatment for frizzy hair page is the better place to start.

How to use a leave in treatment

• Apply it to towel-dried hair, not dripping wet hair, so it isn't watered down.
• Start with less than you think. A pea-sized amount of cream covers shoulder-length hair. Long or thick hair needs more.
• Work it through the mid-lengths and ends first. Roots rarely need it and go greasy fast.
• Comb it through with a wide-tooth comb so every section gets some, then style as normal.
• On humid days, finish with a drop of oil on the ends.

If your hair feels coated or looks flat after a few days, you're using too much or the wrong weight. Go lighter before you give up on it. If the frizz is back by midday, use a little more or step up to a richer formula.

What to pair it with

A leave in treatment works best as the last step of a routine that isn't working against it. A harsh shampoo that strips the hair every wash will undo most of what the treatment puts back. Pair it with a gentle shampoo and a moisturising conditioner from our dry hair products. If frizz is the bigger worry, browse everything for frizzy hair, from anti-frizz shampoo to styling cream.

Once a week, a rinse-out mask gives dry hair a deeper dose than a leave in can. AMR stocks salon-quality creams, sprays, oils and masks, so you can compare formats side by side in all hair treatments and buy the one that fits your hair, not the one with the loudest label.

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