Hemp seed oil is a nutrient-dense cooking and supplement oil prized for its fatty acid balance, skin benefits, and potential cardiovascular support. It’s cold-pressed from the seeds of the hemp plant and contains no CBD or THC, making it purely a nutritional product rather than a cannabinoid one.
Hemp Seed Oil Is Not CBD Oil
This distinction matters because the two are frequently confused. Hemp seed oil comes from pressing cannabis seeds and contains no CBD. CBD oil, by contrast, is extracted from the flowers and leaves of hemp plants and is suspended in a carrier oil like olive or coconut oil. When you see hemp seed oil in the grocery store or listed as an ingredient in a salad dressing, it’s a food product. It won’t produce any psychoactive or cannabinoid effects. Its value is entirely nutritional.
A Standout Fatty Acid Profile
The main reason hemp seed oil gets attention is its ratio of omega-6 to omega-3 fatty acids, which sits at roughly 3:1. Nutrition researchers have proposed this proportion as close to ideal for a healthy diet, and it’s hard to find in other common oils. Most Western diets skew heavily toward omega-6 (ratios of 15:1 or higher are typical), so hemp seed oil offers a more balanced source of both essential fats in a single product.
The omega-6 fatty acid in hemp seed oil is linoleic acid, which your body can convert into arachidonic acid and gamma-linolenic acid (GLA). The omega-3 is alpha-linolenic acid (ALA), a precursor to the same long-chain fatty acids found in fish oil: EPA and DHA. Hemp seed oil also contains meaningful amounts of vitamin E (between 76 and 92 mg per 100 g of oil) and plant sterols, both of which act as antioxidants and support cell membrane health.
Skin Health and Eczema
Hemp seed oil is one of the more promising plant oils for skin conditions, both taken orally and applied topically. In a clinical trial of patients with atopic dermatitis (eczema), dietary hemp seed oil significantly improved both skin dryness and itchiness. The fatty acid profile appears to strengthen the skin’s lipid barrier, which is the layer that locks in moisture and keeps irritants out.
For acne-prone skin, lab research shows hemp seed extracts can reduce inflammation and slow excess oil production in sebaceous glands. The extracts work by dialing down the cellular signals that trigger fat buildup in oil-producing cells. They also inhibit a specific enzyme involved in inflammatory signaling and reduce the activity of a protein that breaks down collagen. In practical terms, this means hemp seed oil may help calm inflamed breakouts without clogging pores, which is why it appears in so many “non-comedogenic” skincare products. It’s often used as a lightweight facial oil or mixed into moisturizers.
Cardiovascular Effects
The heart-related benefits of hemp seed oil are real but more modest than some marketing suggests. In a randomized, double-blinded crossover trial comparing hemp seed oil to flaxseed oil, the hemp seed supplement improved the ratio of total cholesterol to HDL (“good”) cholesterol. A higher version of that ratio is associated with coronary heart disease, so lowering it is generally favorable.
Hemp seed oil has also shown the ability to normalize platelet aggregation, which is the tendency of blood cells to clump together and form clots. In animal studies, adding 10% hemp seed to a high-cholesterol diet brought platelet clumping back to normal levels, even without correcting the elevated cholesterol itself. Researchers attributed this partly to increased levels of gamma-linolenic acid in the blood. However, one trial using 2 grams per day of hemp seed oil in healthy adults found no significant changes in total cholesterol, LDL, HDL, or triglycerides, suggesting the dose or duration may need to be higher for measurable lipid changes.
PMS and Hormonal Sensitivity
Gamma-linolenic acid, one of the fatty acids your body produces from the linoleic acid in hemp seed oil, has a specific role in hormone-related symptoms. GLA is a precursor to prostaglandin E1, a compound that modulates how sensitive your tissues are to prolactin. Women with PMS may have normal prolactin levels but abnormally heightened sensitivity to them, and this sensitivity appears linked to low prostaglandin E1.
In a randomized, double-blind, placebo-controlled study, essential fatty acid supplementation didn’t change prolactin levels directly. Instead, symptoms improved through the downstream effects of prostaglandin E1 on prolactin receptors. This means hemp seed oil’s GLA content may ease PMS symptoms like breast tenderness, bloating, and irritability not by altering hormone levels but by changing how your body responds to them.
Cooking and Storage
Hemp seed oil has a maximum cooking temperature of about 330°F (165°C), which makes it unsuitable for frying or high-heat sautéing. It’s best used as a finishing oil: drizzled over salads, grain bowls, roasted vegetables, or blended into smoothies and dressings. It has a mild, slightly nutty flavor that turns bitter when overheated.
Because it’s a polyunsaturated oil, hemp seed oil goes rancid faster than olive oil or coconut oil. Store it in the refrigerator in a dark bottle, away from heat and light. If it develops a bitter or sharp smell, it’s oxidized and should be replaced. Buying smaller bottles and using them within a few weeks is a better strategy than stocking up.
Blood Thinner Interactions
Hemp seed oil itself has not been directly implicated in drug interactions with anticoagulants. The documented concerns involve CBD-containing products, which are a different substance entirely. In two case reports, patients stable on warfarin became unstable after starting CBD, with one patient’s clotting time rising so dramatically that the warfarin dose had to be cut by 30%. Another patient experienced bleeding events. These interactions are attributed to how CBD affects liver enzymes that metabolize warfarin.
That said, hemp seed oil’s ability to reduce platelet aggregation means it could theoretically amplify the effects of blood-thinning medications at high doses. If you take anticoagulants and want to add hemp seed oil to your routine in supplement quantities rather than just as a salad drizzle, it’s worth flagging for your prescriber.