Hemp Seed Oil for Hair: Benefits and How to Use It
Hemp Seed Oil for Hair: Benefits and How to Use It
Hemp seed oil for hair is a light, fast absorbing oil cold pressed from hemp seeds, rich in linoleic and linolenic acid, and it contains essentially no CBD. On hair it works as a surface conditioner: it softens, adds slip, tames frizz and reduces the friction that snaps dry strands. What it does not do is penetrate the fibre the way coconut oil can, or change how fast your hair grows.
Key takeaways
- Hemp seed oil is pressed from the seeds and is not CBD oil. The two are different products.
- It is a sealing and softening oil, not a penetrating one. Coconut oil is the penetrating one.
- Best used as a pre-wash oil, or a few drops on damp ends after washing.
- It oxidises quickly, so buy it in dark glass, keep it cool and replace it once it smells sharp.
- It helps you keep length by reducing breakage. It does not change growth at the follicle.
What is hemp seed oil, and is it the same as CBD oil?
Hemp seed oil is cold pressed from the seeds of Cannabis sativa varieties grown for fibre and food, which are legally required to contain only trace THC. The pressing gives a green-gold oil with a nutty smell that is sold in supermarkets as a salad oil as much as it is sold in beauty shops.
CBD oil is a different product from a different part of the plant. It is extracted from leaves and flowers and sold for its cannabinoid content, at a very different price. Hemp seed oil contains essentially no cannabinoids at all. If a hair product markets itself on cannabis benefits while listing hemp seed oil in the ingredients, it is trading on an association it does not have.
What hemp seed oil does have is an unusual fatty acid profile. Research on hempseed oil composition, including a 2026 analysis in the Journal of Oleo Science, consistently finds it dominated by linoleic acid at roughly 50 to 60 percent and alpha-linolenic acid at around 15 to 20 percent, with a small amount of gamma-linolenic acid. That ratio is nutritionally interesting and it is also why the oil is light on hair and why it goes off quickly.
Is Indian hemp the same thing?
Not necessarily, and this is worth clearing up because the two names get tangled. In hair care, Indian hemp usually refers to one of two things: the traditional pomades sold under that name in Black hair care aisles, which are typically petrolatum and mineral oil based and contain little or no actual hemp, or to Cannabis sativa itself, which is what botanists once called Indian hemp.
If you arrived here looking for the pomade, the honest answer is that it is a heavy sealing grease and behaves nothing like the light pressed seed oil described on this page. If you arrived looking for the plant oil, you are in the right place. Everything below concerns cold pressed hemp seed oil for hair, the ingredient you will see listed as Cannabis Sativa Seed Oil.
Reading an ingredients list
Cannabis Sativa Seed Oil is hemp seed oil. Cannabidiol or CBD is a different ingredient. Petrolatum high on the list means you have a mineral-oil pomade, whatever the front of the tub says.
What does hemp seed oil for hair actually do?
Four benefits are reasonable to claim, and all of them are cosmetic. It coats the cuticle so strands slide past each other instead of catching, which is why hair feels softer and combs more easily. It reduces frizz by helping the cuticle lie flat. It adds a low-key shine without the heaviness of a castor or olive oil. And used before washing, it cushions the fibre against the mechanical roughness of shampooing.
That last point is the most useful one, and it is where the research on hair oiling is strongest. A study in the Journal of Cosmetic Science measured protein loss from hair with and without oil, and found that oils applied before washing reduced it. The catch, and it is an important one for honesty, is that coconut oil clearly outperformed the others because its lauric acid is small and straight enough to move into the fibre. Hemp seed oil's linoleic acid is bulkier and stays largely on the surface.
So the fair summary is that hemp seed oil is a very good surface conditioner and a mediocre penetrating oil. For fine hair that coconut oil weighs down, that trade-off is often exactly what you want. For coarse, high porosity hair, coconut before washing and hemp afterwards is a better pairing than either alone.
| Oil | Weight | Penetrates the fibre? | Best job |
|---|---|---|---|
| Hemp seed | Light | Largely no | Softening and frizz control on fine to medium hair |
| Coconut | Medium | Yes, best studied | Pre-wash oiling to reduce protein loss |
| Argan | Light to medium | Partly | Shine and finishing on most hair types |
| Castor | Heavy | No | Sealing coarse, dry or coily ends |
For the fuller comparison, our guide to what argan oil really does goes through the same evidence for the most heavily marketed oil of the lot.
How do you use hemp seed oil for hair, step by step?
There are two sensible ways to use it, and they suit different hair. Pick one rather than doing both on the same day.
As a pre-wash oil, once or twice a week.
- Patch test on your inner forearm 24 hours before the first use.
- Warm a teaspoon between your palms. Long or thick hair may need two.
- Work it through dry mid lengths and ends first, then a little onto the scalp only if your scalp is dry rather than oily.
- Massage the scalp for two to three minutes with finger pads, never nails.
- Leave for 30 minutes, or overnight on an old pillowcase if your hair is very dry.
- Shampoo onto the oily hair before adding water, then rinse and repeat.
As a finishing oil, on damp hair after washing.
- Towel-blot hair so it is damp rather than dripping.
- Warm two to four drops between your palms. Fine hair needs less than you think.
- Press it through the bottom third of your hair, focusing on the ends.
- Comb through with a wide tooth comb to distribute it evenly.
- Style as usual. Add heat protection separately if you are blow drying or using irons.
Get a discount on the dry hair range
Join the Watermans mailing list and we will email a discount code straight to your inbox, so you can try the dry hair range for less. Vegan, made in the UK, over 5 million bottles sold since 2012.
Camellia & Black Castor Hair & Body Oil £24.95
A blend of black castor and camellia oils for hair, scalp and body. Heavier than hemp seed oil, which makes it the better pre-wash choice for coarse, dry or coily hair that needs real sealing.
Who should be careful with it?
Anyone with a known seed or nut sensitivity should patch test carefully, and anyone with a broken, weeping or infected scalp should leave oils alone entirely until the skin has settled. Fine, low density hair and genuinely oily scalps will find that even a light oil flattens the roots, so keep it to the ends.
The bigger practical issue is storage. Hemp seed oil is unusually rich in polyunsaturated fats, which is exactly what makes it oxidise quickly. Buy small bottles in dark glass, keep them away from sunlight and heat, refrigerate if you use it slowly, and replace it as soon as it smells sharp or bitter. Rancid oil on hair smells bad and is more likely to irritate the scalp.
Watermans products are 100% cosmetic and do not treat medical hair loss. Individual results may vary.
Hair loss, hair shedding or hair breakage: where an oil helps
An oil is only ever the right answer to one of these three, so it is worth naming them properly before you spend money.
Hair loss happens at the follicle. In pattern thinning, hairs shrink over years until they no longer cover the scalp, and in alopecia areata the immune system attacks the follicle. Hemp seed oil for hair does nothing about either, because it never gets near the mechanism. Widening partings, receding hairlines and defined patches need a GP.
Hair shedding is a disruption of the growth cycle. Telogen effluvium tips an unusually large share of follicles into the resting phase after illness, childbirth, surgery, sharp weight loss or acute stress, and the hairs release two to three months later. It settles when the trigger is addressed. Oil neither helps nor hinders.
Hair breakage is the fibre snapping along its length, and this is the one an oil genuinely addresses. If you are finding short broken pieces, frizz along the mid lengths and hair that never seems to gain length, reducing friction and dryness will keep more of what you grow. Our guides on matching the fix to the cause of damage and the four step routine for dry hair cover the rest of it.
Masque Me® Repairing Hair Mask £24.95
An 8-in-1 deep conditioning mask for the weekly step. Where an oil sits on the surface, a mask delivers conditioning agents and hydrolysed proteins into dry, porous lengths.
Condition Me® Hair Growth Conditioner £13.95
A breakage-defence conditioner with cholesterol, shea butter and hydrolysed lupine protein, for the mid lengths and ends at every wash. The everyday partner to any pre-wash oil.
If your scalp rather than your ends is the problem, our guide to keeping your scalp healthy is a better starting point than any oil.
Frequently Asked Questions
Is hemp seed oil the same as CBD oil?
No, and the difference matters. Hemp seed oil is cold pressed from the seeds of Cannabis sativa and contains essentially no cannabinoids. CBD oil is extracted from the leaves and flowers and is sold for its cannabinoid content. Hemp seed oil is a food-grade cosmetic oil, closer in character to sunflower or grapeseed oil than to anything you would find in a pharmacy.
Will hemp seed oil for hair make my hair grow faster?
No. No oil changes the speed at which hair grows, because growth rate is set at the follicle and an oil sits on the fibre and the scalp surface. What a good oil can do is help you keep the length you already grow, by reducing the friction and dryness that cause strands to snap. That is a real benefit, just not the one the marketing usually promises.
Does hemp seed oil penetrate the hair shaft?
Not meaningfully. Penetration depends on molecular shape, and it is coconut oil's lauric acid that is small and straight enough to move into the fibre. Hemp seed oil is dominated by linoleic and linolenic acids, which are bulkier and largely stay on the surface. That makes it a good sealing and softening oil rather than a repairing one.
Is hemp seed oil good for oily or fine hair?
It is one of the better choices for fine hair because it is comparatively light, but it is still an oil. Keep it to the mid lengths and ends, use a couple of drops rather than a palmful, and leave the scalp out of it if you get greasy quickly. Anyone with a genuinely oily scalp will do better with a leave-in conditioner than any oil.
How often should I use hemp seed oil for hair?
Once or twice a week as a pre-wash oil suits most people, and a few drops on damp ends after washing can be daily if your hair is coarse or dry. Fine hair usually tolerates less. More frequent use is not better and tends to end in build-up, limp roots and an extra wash.
Does hemp seed oil go rancid?
Yes, faster than most. Its high polyunsaturated content makes it prone to oxidation, which is why good hemp seed oil is sold in dark glass and often recommended for refrigeration. If yours smells sharp, bitter or like old paint, throw it out. Oxidised oil is more likely to irritate skin and it smells unpleasant on hair.
Can I use it on my scalp if I get dandruff?
You can massage a small amount into a dry, flaky scalp to soften scale before washing, and many people find that comfortable. It is not a solution for persistent dandruff, which usually involves a yeast on the scalp that oil does nothing about and can even feed. Ongoing flaking, itching or soreness is worth a pharmacist or GP visit.
Is hemp seed oil for hair safe in pregnancy?
Hemp seed oil used topically is generally regarded as low risk, but there is little specific research, so check with your midwife or GP if you are pregnant or breastfeeding. As with any new cosmetic oil, patch test on your inner forearm 24 hours beforehand whether you are pregnant or not.
Sources & References
- Effect of Geographical Origin and Shelling Processing on the Nutritional Components of Hempseed Oil. Journal of Oleo Science, 2026. PubMed 41621928
- Rele AS, Mohile RB. Effect of mineral oil, sunflower oil, and coconut oil on prevention of hair damage. Journal of Cosmetic Science, 2003. PubMed 12715094
- Gavazzoni Dias MF. Hair cosmetics: an overview. International Journal of Trichology, 2015. PubMed 25878443
- NHS. Hair loss. nhs.uk
The Bottom Line
Hemp seed oil for hair is a genuinely useful, genuinely modest product. It is light, it softens and smooths, it suits fine to medium hair that heavier oils flatten, and it is not CBD oil whatever the packaging implies. Use it as a weekly pre-wash oil or a few drops on damp ends, keep it out of sunlight, and replace it when it smells sharp. It will help you hold onto the length you grow. It will not change what your follicles are doing, and nothing you rub on the outside of a hair can.
Watermans is a British family brand. Our products are vegan, made in the UK and cruelty free, with over 5 million bottles sold since 2012.
