Hemp seed oil can be applied directly to your hair and scalp as a leave-in treatment, mixed into a hair mask, or taken as a dietary supplement. Its effectiveness comes from an unusually high concentration of polyunsaturated fatty acids, about 81% of its total fat content, which help moisturize the hair shaft, reduce breakage, and calm scalp irritation. Here’s how to get the most out of it.
Why Hemp Oil Works for Hair
Hemp seed oil is roughly 60% linoleic acid (an omega-6 fat) and 18% alpha-linolenic acid (an omega-3 fat), giving it a 3:1 omega-6 to omega-3 ratio that closely matches what your body uses efficiently. These essential fatty acids can’t be made by your body, so delivering them directly to the hair shaft or consuming them fills a genuine nutritional gap.
Oils rich in omega-3 and omega-6 fatty acids help protect hair in three practical ways: they reduce the amount of water hair absorbs and releases (which causes swelling and weakening over time), they lubricate the shaft to lower friction during brushing and styling, and they reduce the force needed to comb through wet hair. All of this translates to less breakage day to day. Hemp oil also contains B vitamins, vitamin D, and minerals like zinc, iron, calcium, and phosphorus, all of which support the cells that build new hair.
Hemp Seed Oil vs. CBD Oil
These two products come from the same plant but are very different. Hemp seed oil is pressed from the seeds of the cannabis plant. It contains no CBD and no THC, so there’s no psychoactive effect whatsoever. Its value for hair is purely nutritional: fatty acids, vitamins, and antioxidants.
CBD oil, on the other hand, is extracted from the stalks, leaves, and flowers of the hemp plant, where CBD concentrates. CBD interacts with the body’s endocannabinoid system, which helps regulate inflammation and cellular repair. Some early research suggests this system plays a role in hair follicle health, but the evidence is preliminary. For straightforward moisture, strength, and scalp conditioning, hemp seed oil is the more practical and affordable choice.
How to Apply It Directly
The simplest method is using hemp seed oil as a standalone treatment. Warm a small amount (a teaspoon or so, depending on hair length) between your palms and work it through damp or dry hair from mid-shaft to ends. You can also massage it into your scalp if dryness or irritation is an issue. Leave it on for 20 to 30 minutes, then shampoo it out. For a deeper treatment, apply it to your scalp before bed, sleep on a towel or old pillowcase, and wash it out in the morning.
Hemp seed oil has a comedogenic rating of zero, meaning it does not clog pores. This makes it one of the safest oils to leave on your scalp, even if you’re prone to buildup or breakouts along the hairline.
A Simple DIY Hair Mask
For a more intensive treatment, you can blend hemp oil with other moisturizing ingredients. One effective combination: half a peeled avocado, half a banana, one egg yolk (whisked until frothy), a teaspoon of aloe vera gel, two tablespoons of plain yogurt, and two to four drops of hemp seed oil. Blend everything into a smooth paste.
Section your hair and apply the mask from roots to ends. Leave it on for 20 to 30 minutes, then rinse with cool water. This is important: warm or hot water will cook the egg and leave bits in your hair. Follow up with your regular shampoo. This mask doesn’t store well, so use it immediately after making it.
How Often to Use It
Your ideal frequency depends on your hair type. If you have dry, coarse, or curly hair, hemp seed oil is light enough to use as a daily leave-in moisturizer. Just use a few drops on damp hair after washing and skip the rinse-out step.
If your hair is fine or straight, daily oil can weigh it down. A better approach is using hemp oil as a weekly hot oil treatment: warm the oil slightly, apply it to your hair and scalp, wrap your head in a warm towel for 20 to 30 minutes, then shampoo. For scalp issues like dryness or excess oiliness, an overnight scalp application once or twice a week followed by a morning shampoo tends to work well.
Taking Hemp Oil Internally
You can also support hair health by adding hemp seed oil to your diet. The omega-3 and omega-6 fatty acids it provides work systemically, nourishing hair follicles from the inside. Research on oral supplementation with these fatty acids has shown they can help reduce hair loss when combined with antioxidants.
Hemp seed oil is commonly sold in bottles for drizzling over food (it has a mild, nutty flavor) or in capsule form. One to two tablespoons per day is a typical dietary amount. Don’t cook with it, though. Its high polyunsaturated fat content means it breaks down at relatively low temperatures, which destroys the beneficial compounds and creates off flavors.
Storing Hemp Oil Properly
Hemp seed oil oxidizes faster than many other oils because of all those polyunsaturated fats. A study tracking hemp oil over nine months found that oil stored at cool temperatures (around 50°F or 10°C) in the dark stayed well within freshness limits regardless of container type. At room temperature with light exposure, the oil degraded significantly unless stored in opaque, light-blocking containers.
For practical purposes: keep your hemp seed oil in the refrigerator, ideally in a dark glass bottle. If you store it at room temperature, keep it in a cabinet away from light and use it within a few months. Cold-pressed hemp oil stored properly in glass at cool temperatures can last roughly nine months before quality drops noticeably. If it smells sharp or painty instead of nutty, it has gone rancid and won’t deliver the same benefits.
What to Expect
Hemp seed oil is not a miracle cure for hair loss or a substitute for medical treatment if you’re experiencing significant thinning. The direct clinical evidence for hemp seed oil specifically is limited, and most of what we know is extrapolated from research on similar plant oils and essential fatty acid supplementation. That said, the fatty acid profile is genuinely exceptional for hair moisture and strength, and the zero comedogenic rating makes it one of the lowest-risk oils you can try.
Most people notice softer, more manageable hair within the first few uses. Improvements in scalp dryness or irritation typically take a couple of weeks of consistent use. If you’re taking it orally to support hair growth, give it at least two to three months, since hair grows only about half an inch per month and changes to the growth cycle take time to become visible.