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Coconut

Lauric‑rich oil that actually gets into hair

Cocos nucifera

Tiny workers on ladders paint a giant strand of hair with coconut oil.
Illustration

The short version

Oil pressed from the coconut kernel, rich in lauric acid. It’s solid below about 24°C and melts on skin. People use it to soften skin and to pre‑oil hair to help limit breakage.

Family
Arecaceae
Part used
Kernel (pressed oil)
Comes from
Tropical Indo-Pacific; grown throughout the tropics

Good for?

As a pre‑wash or leave‑in hair oil, it can reduce protein loss from strands in lab tests and small human studies, which likely means less combing damage. On skin, it works as an emollient and occlusive to boost hydration; a randomized trial in preterm infants improved skin moisture and condition. People also use it for scalp massage; direct evidence for hair growth from oiling is not present in the supplied work.

Does it actually work?

Real trials.

Controlled trials on people back it up.

Evidence grade 4 out of 5.

“For hair, several lab methods and small human observations suggest coconut oil penetrates the fibre and reduces protein loss during washing and combing, supporting a plausible route to less breakage.”

What the studies say

For hair, several lab methods and small human observations suggest coconut oil penetrates the fibre and reduces protein loss during washing and combing, supporting a plausible route to less breakage. Most of this is bench work or observational, not large randomized trials. For skin, a randomized trial in 90 preterm neonates found daily coconut oil increased skin moisture and supported skin integrity versus control. In workers with hand dermatitis, a crossover RCT found both glycerin‑only and glycerin‑with‑coconut oil moisturizers improved barrier measures over two weeks, with no clear difference between them. Direct, well‑controlled trials of scalp oiling for hair growth were not present in the supplied abstracts.

A person with very long hair combs oil through it, a coconut half used as a bowl.
Illustration

What's inside

  • dominantLauric acid (as triacylglycerols)Dominance is linked to the oil’s polarity and affinity for hair proteins in studies.

Read this first

An expert panel concluded most Cocos nucifera–derived ingredients are safe in cosmetics as currently used; data were insufficient for coconut shell powder under intended use. As with any cosmetic, discontinue use if irritation occurs.

Reviewed by the Expert Panel for Cosmetic Ingredient Safety: most coconut‑derived cosmetic ingredients are considered safe as used; safety was insufficiently supported for Cocos Nucifera (Coconut) Shell Powder.

The stories

2 in the Journal

Evidence Check · Coconut

Coconut oil and hair breakage: one of the few oils with real data

Coconut oil is one of the few hair oils shown in lab work to penetrate the hair shaft and to reduce protein loss during washing. The support comes mainly from in‑vitro and small human observational work; large controlled clinical trials are still lacking.

  • Hair

Origins · Scalp

Scalp oiling: tradition, trend and what the science says

Scalp oiling is an old care ritual whose modern popularity rests on texture, comfort and smell as much as any biological effect. Laboratory work shows coconut oil can change hair-fibre mechanics and has antibacterial activity in vitro; a randomized trial in preterm infants shows topical coconut oil increases skin moisture. Clinical evidence for scalp oiling specifically is thin.

  • Hair

Reviewed

Sources

  1. The effects of coconut oil and moisturising lotion on skin condition and vital signs in preterm neonates: A randomised controlled trial. — Güner Başara S, Kahraman Berberoğlu B, Çalişir H, Sözkesen Z, Emirhan M, Şahin S. · Journal of pediatric nursing · 2026
  2. Cocos nucifera and glycerine afterwork moisturizers for secondary prevention of hand dermatitis among fabric worker: a randomized, double-blind, cross over trial. — Budianti WK, Soebaryo RW, Mansyur M, Suyatna FD, Siagian M, Djajadisastra J, Prakoeswa CRS. · Scientific reports · 2024
  3. Safety Assessment of Cocos nucifera (Coconut)-Derived Ingredients as Used in Cosmetics. — Akinsulie A, Burnett C, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD, Liebler DC, Marks JG, Peterson LA, Shank RC, Slaga TJ, Snyder PW, Heldreth B. · International journal of toxicology · 2023
  4. Secondary ion mass spectrometric investigation of penetration of coconut and mineral oils into human hair fibers: relevance to hair damage. — Ruetsch SB, Kamath YK, Rele AS, Mohile RB. · Journal of cosmetic science · 2001
  5. Effect of mineral oil, sunflower oil, and coconut oil on prevention of hair damage. — Rele AS, Mohile RB. · Journal of cosmetic science · 2003
  6. Health Effects of Coconut Oil-A Narrative Review of Current Evidence. — Wallace TC. · Journal of the American College of Nutrition · 2019
  7. Alternative Protocol for Hair Damage Assessment and Comparison of Hair Care Treatments. — Kaushik V, Chogale R, Mhaskar S. · International journal of trichology · 2020
  8. Hair breakage index: an alternative tool for damage assessment of human hair. — Mhaskar S, Kalghatgi B, Chavan M, Rout S, Gode V. · Journal of cosmetic science · 2011
  9. A Method to Measure Oil Penetration into Hair and Correlation to Tensile Strength. — Sureka P, Agrawal T, Majumder S, Ritambhara K. · International journal of trichology · 2022
  10. Single hair fiber assessment techniques to discriminate between mineral oil and coconut oil effect on hair physical properties. — Kaushik V, Chogale R, Mhaskar S. · Journal of cosmetic dermatology · 2021
  11. Antimicrobial Potential of Cocos nucifera (Coconut) Oil on Bacterial Isolates. — Bhardwaj V. · Advances in experimental medicine and biology · 2025
  12. The Effect of Coconut and Frankincense Oils on the Biofilm Growth of Streptococcus mutans. — Alghamdi N, Alshamrani L, Alboryah S, Alsenan JF, Alshehri T, Abogazalah NN, Balhaddad AA. · F1000Research · 2025