Hemp seed oil is a nutrient-rich cooking and skincare oil pressed from the seeds of the hemp plant (Cannabis sativa L.). It contains no meaningful amount of CBD or THC, which makes it fundamentally different from CBD oil despite coming from the same plant species. What makes hemp seed oil stand out is its fatty acid profile: 70 to 90% of its fat content is polyunsaturated, with an omega-6 to omega-3 ratio of roughly 3:1, a balance that nutritionists consider ideal for human health.
How Hemp Seed Oil Is Made
Most hemp seed oil on store shelves is cold-pressed, meaning the seeds are mechanically squeezed without heat or chemical solvents. This preserves the oil’s nutrients and flavor but captures only about 65% of the oil available in the seeds. The remaining 35% stays trapped in the leftover seed cake, which is often used as animal feed or protein powder.
Some manufacturers use solvent-based extraction with chemicals like hexane, which pulls out more oil but can leave trace residues and strip away beneficial compounds. Cold-pressed oil has become the industry standard for food-grade products because consumers prefer a cleaner process. You may also see “supercritical CO2 extraction” on premium labels, a technique that uses pressurized carbon dioxide to produce very high-quality oil without solvents.
Hemp Seed Oil vs. CBD Oil
This is the single biggest point of confusion. Hemp seed oil comes from the seeds only. CBD oil comes from the flowers, leaves, and stalks of the hemp plant, where cannabinoids concentrate. According to the Vermont Agency of Agriculture, hemp seed oil “generally contains no more than trace amounts of cannabinoids, such as CBD and THC.” It will not produce any psychoactive effect, and it won’t show up on a drug test in any meaningful way.
Industrial hemp itself is legally required to contain no more than 0.3% THC by dry weight under the 2018 Farm Bill. But hemp seed oil falls well below even that threshold because seeds don’t produce cannabinoids. If you’re shopping for anti-anxiety or pain-relief properties associated with CBD, hemp seed oil is not the right product. If you’re looking for a nutritional oil rich in essential fatty acids, it is.
Nutritional Profile
Hemp seed oil’s main nutritional draw is its polyunsaturated fat content. That 3:1 ratio of omega-6 to omega-3 fatty acids is closer to what researchers recommend than most cooking oils. For comparison, sunflower oil runs around 20:1, and corn oil is about 46:1. A lopsided ratio can promote chronic inflammation over time, so hemp seed oil offers a meaningful advantage here.
The oil also contains gamma-linolenic acid (GLA), a specific omega-6 fat that behaves differently from most omega-6s. Rather than promoting inflammation, GLA actively reduces it by blocking several inflammatory signaling pathways in the body. GLA inhibits the production of certain inflammatory molecules made by immune cells and activates protective antioxidant pathways. This dual role makes hemp seed oil unusual among plant oils. Beyond fats, the oil provides vitamin E (which also acts as a natural preservative), magnesium, and potassium.
Heart Health Benefits
The most studied benefit of hemp seed relates to cardiovascular health, and the oil’s fatty acids are central to those findings. Hemp seed compounds, including its polyunsaturated fats and plant sterols like beta-sitosterol, can reduce how much cholesterol your intestines absorb from food. They do this by dialing down a specific protein in the intestinal wall responsible for pulling cholesterol into your bloodstream.
Hemp seed also supports healthy blood pressure through several mechanisms. Bioactive peptides from hemp protein inhibit enzymes that constrict blood vessels, while also boosting nitric oxide, a molecule that relaxes artery walls. The magnesium in hemp seeds contributes as well, acting as a natural calcium blocker that helps blood vessels dilate. Potassium plays a complementary role by relaxing the smooth muscle cells lining blood vessel walls.
It’s worth noting that much of this research involves whole hemp seeds or hemp protein rather than the isolated oil. The oil retains the fatty acids and fat-soluble compounds like plant sterols, but water-soluble peptides and minerals are more concentrated in the seed itself or in hemp protein products.
Skin and Topical Uses
Hemp seed oil has become a popular ingredient in skincare because it moisturizes without clogging pores. Its lightweight texture absorbs quickly, making it suitable for oily and acne-prone skin types as well as dry skin.
The GLA content is particularly relevant for skin. It encourages new cell growth and calms inflammation, which can help with acne, psoriasis, and general irritation. A randomized clinical trial found that people who consumed hemp seed oil daily for 20 weeks saw noticeable improvement in atopic dermatitis (eczema) symptoms and appearance. The oil works both when applied directly to skin and when taken as part of your diet, though topical application targets specific areas more effectively.
For topical use, you can apply a few drops directly to clean skin or mix it into an unscented moisturizer. Some people use it as an oil cleanser, massaging it into dry skin before rinsing. Because it oxidizes relatively quickly, buy small bottles if you plan to use it on your face and check for any sour or paint-like smell before each use.
Cooking With Hemp Seed Oil
Hemp seed oil has a mild, nutty flavor that works well in cold or low-heat applications. Its smoke point sits around 330°F (165°C), which is too low for frying or high-heat sautéing. Once an oil passes its smoke point, it breaks down and develops off flavors while losing nutritional value.
The best uses are salad dressings, drizzling over finished dishes, blending into smoothies, or stirring into dips and sauces. You can also use it in pesto or hummus as a replacement for part of the olive oil. A tablespoon or two per day is a common amount for people using it as a dietary supplement. The flavor pairs well with grains, roasted vegetables, and leafy greens.
Storage and Shelf Life
The same polyunsaturated fats that make hemp seed oil nutritious also make it prone to going rancid. Exposure to heat, light, and air accelerates oxidation. Cold-pressed, unrefined hemp seed oil has a shorter shelf life than refined versions because it retains more of its original compounds, including the delicate fatty acids that break down first.
Refrigeration is the simplest way to extend its usable life. The oil doesn’t need to be refrigerated, but keeping it cold noticeably slows rancidity. Store it in a dark glass bottle with a tight seal, and keep it away from the stove or any heat source. If you buy a bottle with added vitamin E (tocopherol) on the label, that’s functioning as a natural antioxidant to help preserve freshness. Once opened, plan to use it within a few months. If it smells sharp, bitter, or like old paint, it has turned and should be discarded.