Best conditioner for frizzy curls
Ouidad Advanced Climate Control Defrizzing Conditioner is the most effective pick for frizzy curls. Frizz happens when a raised, thirsty cuticle pulls moisture from humid air and strands swell out of their curl pattern. This conditioner pairs conditioning agents that coat and smooth the cuticle with sericin, a silk-derived protein, plus hydrolyzed wheat and soy proteins, a ceramide and shea butter, so curls stay softer, more defined and less reactive to humidity. You should notice smoother curls from the first wash. The ethical pick, Curlsmith Frizz Control Duo Conditioner, is cruelty free and vegan and relies on plant oils and butters such as argan oil, black currant seed oil and coconut butter to soften and seal strands. The table below compares price and time to results. For either one, work it through from mid-lengths to ends on soaking-wet hair and leave it on for a few minutes before rinsing, so the conditioners have time to settle onto the cuticle.
| Option | Product | Price | Price per use | Days to results | Compared with most effective |
|---|---|---|---|---|---|
| Most effective | Ouidad Advanced Climate Control Defrizzing Conditioner | US$24 | US$1.43 | 1 | |
| Cruelty free and vegan | Curlsmith Frizz Control Duo Conditioner | US$26 | US$1.21 | 1 | US$2.00 more than the most effective pick, same time to first results |
Why it works
Conditioning agents (silicones, cationic surfactants, fatty alcohols)
Conditioners work mainly on the hair surface. Washing leaves hair with a negative electrical charge, and positively charged cationic surfactants, the backbone of most conditioners, bind to it and cut static. Silicones such as dimethicone and amodimethicone form a thin film that lowers friction between strands and shields them from abrasion, and fatty alcohols like cetyl and stearyl alcohol add body and slip. Reviews link this to less frizz, easier combing and less grooming damage. This is well-established cosmetic science, measured mostly in the lab, not consumer trials. Effects last until the next wash, and leave-on products can make fine, straight hair look oily or dull.
Hydrolyzed proteins, keratin and amino acids
Hydrolyzed proteins are proteins broken into smaller pieces so they can cling to, and sometimes enter, the hair shaft. In a lab study on chemically relaxed, very curly hair, small and mid-sized keratin peptides reached the inner cortex, and mid-sized and large peptides raised break strength and cut early breakage. Dermatology reviews describe a protective, anti-frizz effect and note that proteins can temporarily mend split ends. The evidence is mostly lab testing on hair fibers, partly funded by an ingredient supplier, with no consumer trials. Effects wash out over time, and amino acids do not rebuild damaged keratin.
Plant oils for hair (coconut, argan)
Plant oils mainly coat the hair surface, reducing friction and slowing water uptake. Coconut oil is the best studied: in a lab study by researchers at a hair-oil company, it was the only one of three oils that markedly reduced protein loss from hair, which the authors credit to its small, straight fat molecules entering the shaft. Sunflower and mineral oil did not reduce protein loss. Evidence for argan oil is thinner: one small lab study found a conditioner containing it reduced protein loss in hair treated with a lightening dye. There are no good consumer trials. Like other leave-on products, oils can make fine, straight hair look oily.
Best leave-in treatment for dry curly hair
Best conditioner for wavy hair
Best conditioner for flyaway hair
Sources
- Shampoo and Conditioners: What a Dermatologist Should Know?
- Hair Cosmetics: An Overview
- Penetration of different molecular weight hydrolysed keratins into hair fibres and their effects on the physical properties of textured hair
- Effect of mineral oil, sunflower oil, and coconut oil on prevention of hair damage
- Hair Protective Effect of Argan Oil (Argania spinosa Kernel Oil) and Cupuassu Butter (Theobroma grandiflorum Seed Butter) Post Treatment with Hair Dye
Reviewed by Emilie Sydney-Smith