Hemp oil, specifically hemp seed oil, is a nutrient-dense oil prized for its unusually balanced fatty acid profile, skin benefits, and potential to ease inflammation and hormonal symptoms. It contains virtually no CBD or THC, so its benefits come from its fats, vitamins, and plant compounds rather than cannabinoids. Here’s what the evidence actually supports.
Hemp Seed Oil Is Not CBD Oil
This distinction matters because the two products come from different parts of the same plant and do very different things. Hemp seed oil is pressed from the seeds of the hemp plant and contains no more than trace amounts of cannabinoids like CBD and THC. CBD oil, by contrast, is extracted from the flowers and leaves and consists primarily of cannabinoids. When you see “hemp oil” on a salad dressing or skincare product, it’s almost always hemp seed oil. If you’re looking for CBD’s effects on anxiety or pain signaling, hemp seed oil won’t deliver that. Its value lies elsewhere.
A Standout Fatty Acid Profile
Hemp seed oil’s nutritional calling card is its 3:1 ratio of omega-6 to omega-3 fatty acids. Most Western diets skew heavily toward omega-6 (ratios of 15:1 or higher are common), which can promote chronic inflammation. Hemp seed oil pushes that ratio closer to the range most nutrition researchers consider ideal.
Beyond the basic omegas, hemp seed oil contains two fatty acids that are uncommon in everyday cooking oils. The first is gamma-linolenic acid (GLA), making up 0.5 to 6% of the oil. GLA is an omega-6 that, paradoxically, helps the body produce compounds that reduce inflammation rather than fuel it. The second is stearidonic acid (SDA), at 0.3 to 2.5%, which your body converts into the same beneficial omega-3s found in fish oil, though less efficiently than getting them from fish directly. For a plant-based oil, this combination is unusual.
About 2 tablespoons per day fits within a standard 2,000-calorie diet and is a common supplemental amount, though there’s no official recommended daily allowance.
Skin Health and Moisturizing
Hemp seed oil has a comedogenic rating of zero, meaning it doesn’t clog pores. That makes it one of the few oils suitable for acne-prone skin. It absorbs quickly, feels lightweight, and doesn’t leave the heavy, greasy residue that many plant oils do.
The GLA content is likely what makes it useful for inflammatory skin conditions like eczema and psoriasis. GLA supports the skin’s lipid barrier, the outermost layer that locks in moisture and keeps irritants out. When that barrier is compromised, skin dries out and flares up. Applying hemp seed oil topically or taking it as a supplement provides the raw material your skin needs to maintain that barrier. People with dry, reactive skin often notice a difference within a few weeks of consistent use.
Joint Pain and Inflammation
A randomized, double-blind trial tested topical hemp seed oil against diclofenac gel (a common over-the-counter anti-inflammatory) and a placebo in 90 patients with knee osteoarthritis. Patients applied their assigned treatment daily for two months. The hemp seed oil group saw significant improvements in pain scores and overall joint function compared to placebo. More notably, the hemp seed oil performed comparably to the diclofenac gel, with no significant difference between the two groups on pain or function measures. The treatment was well tolerated with no notable side effects.
This was a topical application study, so it speaks most directly to rubbing the oil onto sore joints rather than taking it by mouth. The anti-inflammatory fatty acids in the oil appear to penetrate the skin well enough to affect the underlying tissue, though more research with larger groups would strengthen the case.
PMS and Hormonal Symptoms
GLA has a specific connection to premenstrual symptoms. Some women with PMS show reduced activity of an enzyme needed to process omega-6 fats properly, which may make them more sensitive to the hormonal shifts of the luteal phase (the two weeks before a period). Supplementing with GLA appears to bypass that enzymatic bottleneck.
In a controlled trial using daily GLA supplementation at 180 mg, women experienced significantly greater improvement in overall PMS severity and irritability compared to a placebo group. Their blood levels of GLA and its anti-inflammatory byproducts rose measurably. Hemp seed oil is one of the richest plant sources of GLA, making it a practical way to get this fatty acid through food rather than capsules.
Heart and Cholesterol Effects
The cardiovascular picture is mixed. In animal research on obese rats, hemp oil supplementation lowered triglycerides by roughly 45% and reduced several markers used to estimate heart disease risk. However, it did not lower LDL cholesterol (the type most associated with artery-clogging plaque) and had no measurable effect on blood pressure or heart rate. The favorable omega ratio suggests long-term cardiovascular benefits, but the direct evidence so far is modest and mostly from animal models. Hemp seed oil is a healthier fat choice than many alternatives, but it’s not a substitute for proven heart-health strategies like exercise and reducing saturated fat intake.
Brain-Protective Compounds
Hemp seed oil contains polyphenols, plant-based antioxidants that help neutralize the kind of cellular damage linked to cognitive decline. In animal studies, a hemp seed extract containing these polyphenols helped protect brain tissue against inflammation. This is early-stage evidence, and no human trials have confirmed the effect, but it adds to the broader pattern: the oil’s value comes from a combination of healthy fats and protective plant compounds working together, not from any single ingredient.
How to Use and Store It
Hemp seed oil works best unheated. It has a low smoke point, so using it for frying or high-heat cooking breaks down its delicate fatty acids and creates off-flavors. Instead, drizzle it over salads, stir it into smoothies, add it to dips, or use it as a finishing oil on cooked dishes. The flavor is nutty and mild, similar to sunflower seeds.
Because it’s rich in polyunsaturated fats, hemp seed oil oxidizes (goes rancid) faster than more stable oils like olive or coconut. Store it in the refrigerator in a dark glass bottle and use it within a few months of opening. If it smells sharp or bitter, it’s turned and should be replaced. For topical use, you can apply it directly to skin or look for it as an ingredient in moisturizers and serums. A few drops go a long way since it spreads and absorbs easily.