Hemp seed oil is not comedogenic. It scores a 0 on the comedogenic scale, which ranges from 0 (won’t clog pores) to 5 (highly likely to clog pores). This makes it one of the few plant oils that can moisturize skin without contributing to breakouts, and it’s generally considered safe even for acne-prone skin.
Why Hemp Oil Scores Zero
Whether an oil clogs pores depends largely on its fatty acid profile, specifically the ratio of linoleic acid to oleic acid. Oils high in oleic acid tend to be thicker and more likely to sit on the skin’s surface, trapping debris in pores. Oils high in linoleic acid absorb more easily and help keep sebum fluid rather than sticky.
Hemp seed oil is dominated by linoleic acid, which makes up roughly 55% of its total fatty acids. Oleic acid, by contrast, accounts for only about 9.5%. That ratio of nearly 6:1 in favor of linoleic acid is unusually high among plant oils and explains why hemp oil absorbs quickly and leaves minimal residue on the skin.
How Linoleic Acid Affects Pore Clogging
The connection between linoleic acid and clear pores goes beyond simple absorption. Research published in the journal Dermato-endocrinology found that people with acne have significantly lower concentrations of linoleic acid in their skin surface lipids. When linoleic acid drops, sebum becomes thicker and stickier, which makes it more likely to form the plugs that become blackheads and whiteheads. Low linoleic acid levels also weaken the skin’s barrier function, making the walls of clogged pores more permeable to inflammatory compounds, which can turn a simple clogged pore into a red, painful breakout.
Applying an oil rich in linoleic acid can help counterbalance this deficiency. The linoleic acid enters the skin’s oil-producing glands and feeds into the same metabolic pathway that produces squalene and wax esters, two components of healthy sebum. The result is sebum that flows more freely instead of hardening inside the pore.
Benefits for Oily and Acne-Prone Skin
It sounds counterintuitive to put oil on skin that’s already oily, but hemp seed oil can actually help regulate oil production. When skin is dehydrated, it compensates by producing even more sebum, creating a cycle of excess oil and breakouts. Hemp oil provides moisture without the pore-clogging effect, which can interrupt that cycle.
Hemp seed oil also contains gamma-linolenic acid (GLA), an omega-6 fatty acid with anti-inflammatory properties. GLA encourages new cell generation and helps calm the redness and irritation that come with active acne, psoriasis, and eczema. This combination of lightweight hydration and anti-inflammatory activity makes hemp oil particularly well-suited for skin that’s both oily and inflamed.
Hemp Seed Oil vs. CBD Oil
These two products come from the same plant but are quite different. Hemp seed oil is cold-pressed from the seeds and contains no significant amount of cannabidiol (CBD). It’s the fatty acid profile that gives it skincare benefits. CBD oil, on the other hand, is extracted from the flowers and leaves and contains the active compound cannabidiol, which has its own anti-inflammatory and antioxidant effects. Some skincare products combine the two, but when you’re evaluating comedogenic risk, it’s the hemp seed oil base that matters. CBD itself doesn’t have a comedogenic rating, and its effects on pores depend on the carrier oil it’s dissolved in.
Freshness Matters
One important caveat: hemp seed oil’s skin-friendly properties depend on the oil being fresh. Because it’s so high in polyunsaturated fatty acids, hemp oil is highly prone to oxidation. Research from the journal Antioxidants found that under accelerated storage conditions, hemp seed oil lost an average of 86% of its natural antioxidant compounds (tocopherols and phenols). As the oil oxidizes, it produces harmful aldehydes and loses the very fatty acids that make it non-comedogenic in the first place.
Oxidized oil can irritate skin and potentially contribute to clogged pores, even if the fresh version wouldn’t. To keep hemp oil in good condition, store it in a dark glass bottle in the refrigerator. Buy smaller quantities you’ll use within a few months rather than a large bottle that sits around. Fresh cold-pressed hemp oil has a mild, nutty smell. If it smells sharp, bitter, or like paint, it’s gone rancid and shouldn’t go on your face.
How to Use Hemp Oil on Your Face
For general moisturizing, apply two to three drops of hemp seed oil to clean, slightly damp skin after cleansing. It works well as the last step in a skincare routine or mixed into an unscented moisturizer. The oil absorbs within a minute or two and doesn’t leave a greasy film, which makes it practical for daytime use under sunscreen or makeup.
If you’re using it specifically for acne, apply a thin layer directly to clean skin, leave it on for one to two minutes, then rinse with warm water. This short-contact method delivers linoleic acid to the skin without leaving a prolonged oil layer that could interact with sweat, dirt, or other products throughout the day. You can also use it as an overnight treatment on dry or combination skin, since the 0 comedogenic rating means leaving it on is low-risk for most people.
As with any new skincare product, patch-test on a small area of your jaw or inner forearm for a few days before applying it to your entire face. Allergic reactions to hemp seed oil are rare, but individual skin chemistry varies, and what works for most people may not work for everyone.