Sesame oil is used in cooking, skin care, traditional medicine, and even as a carrier in injectable medications. Its versatility comes from a combination of heat-stable fats, natural plant compounds that reduce inflammation, and a flavor profile that ranges from neutral to deeply nutty depending on how it’s processed. Here’s a closer look at each major use.
Cooking With Light vs. Toasted Sesame Oil
There are two main types of sesame oil in the kitchen, and they serve very different purposes. Light (refined) sesame oil has a neutral flavor and a smoke point of 410°F (210°C), making it suitable for stir-frying, sautéing, and deep-frying. Toasted (unrefined) sesame oil has a rich, nutty aroma and a lower smoke point of 350°F (177°C), so it’s typically drizzled over finished dishes, mixed into dressings, or stirred into sauces and marinades rather than used for high-heat cooking.
In East Asian, Southeast Asian, and Middle Eastern cuisines, toasted sesame oil is a finishing oil. A few drops transform a bowl of rice, a plate of noodles, or a simple soup. Light sesame oil, by contrast, works as an everyday cooking fat comparable to peanut or vegetable oil. Both types get about 80% of their fat from unsaturated fatty acids, split roughly between polyunsaturated fats (about 45%) and monounsaturated fats (about 35%), with only around 15% saturated fat.
Heart and Blood Pressure Benefits
Sesame oil’s fat profile alone is favorable for cardiovascular health, but the oil also contains unique plant compounds called lignans that appear to go further. In a clinical trial presented through the American Heart Association, people with mild to moderate high blood pressure who used a sesame oil blend saw their systolic blood pressure drop by about 14 mmHg and diastolic by about 11 mmHg. When combined with blood pressure medication, the reductions were even larger: roughly 36 mmHg systolic and 24 mmHg diastolic compared to baseline.
These effects likely stem from both the fatty acid balance and the lignans acting on inflammation and oxidative stress in blood vessels. The oil’s compounds have been shown to block the release of molecules that promote blood vessel stiffness and plaque formation, including a near-complete suppression of a key inflammatory pathway triggered by oxidized cholesterol at higher concentrations in lab studies.
How Its Compounds Fight Inflammation
Sesame oil contains four main lignans that give it anti-inflammatory properties beyond what you’d expect from a cooking oil. These compounds work by dialing down the body’s inflammatory signaling. Specifically, they reduce the production of several proteins that drive swelling, pain, and tissue damage, including the same inflammatory molecules targeted by common over-the-counter pain relievers.
One lignan reduces the activity of an enzyme called COX-2, which is the same enzyme that ibuprofen blocks. Another lowers levels of inflammatory signaling proteins in brain tissue, which has drawn interest for potential neuroprotective effects. In liver studies, these compounds reversed the inflammatory damage caused by high-fat diets, bringing inflammatory markers back toward normal levels. Research has also shown inhibitory effects on enzymes that break down cartilage, suggesting relevance for joint conditions like osteoarthritis.
These are primarily lab and animal findings, so the effects in humans from simply consuming sesame oil in food are likely more modest. But the consistency of results across different tissues (brain, liver, joints, blood vessels) suggests the oil offers a meaningful anti-inflammatory contribution as part of a regular diet.
Skin Care and Moisturizing
Sesame oil has been used topically for centuries in Ayurvedic practice, and its fatty acid profile explains why it works well on skin. It contains oleic acid, linoleic acid, palmitic acid, and stearic acid, all of which help maintain your skin’s moisture barrier and keep it soft. Linoleic acid is particularly valued because skin that’s low in this fatty acid tends to be more prone to dryness and breakouts.
On the comedogenic scale (a zero-to-five ranking of how likely an oil is to clog pores), refined sesame oil scores a one, meaning it’s unlikely to cause breakouts for most people. Unrefined sesame oil scores a three, so if you’re acne-prone, the refined version is the safer choice for facial use. Either version works well as a body moisturizer or massage oil.
Sun Protection: Limited on Its Own
You’ll sometimes hear that sesame oil offers natural sun protection, and there’s a grain of truth to this. The oil does absorb some ultraviolet radiation, particularly in the UVA range (335 to 380 nm). However, its estimated SPF is only about 2, which is far too low to protect against sunburn or skin damage on its own. Research using reflectance measurements on skin confirmed that sesame oil does not provide significant protection against UV radiation. It can be included in sunscreen formulations alongside stronger UV filters, but it should never replace actual sunscreen.
Pharmaceutical Uses
Sesame oil serves as a carrier for certain injectable medications, most notably progesterone injections used in fertility treatments and hormone therapy. The oil dissolves the hormone and allows it to be absorbed slowly after intramuscular injection. This is worth knowing if you have a sesame allergy, because the oil in these injections can trigger a reaction. Product labels for these medications list sesame oil as an ingredient and warn against use in people with sesame allergies.
Sesame Allergies
About 0.2% of children and adults in the United States are allergic to sesame, a rate similar to soy and pistachio allergies. The highest prevalence is among 18- to 29-year-olds (0.33%), while adults over 60 have the lowest rates (0.09%). Sesame was designated the ninth major food allergen in the U.S., which means it now requires labeling on packaged foods. Before this designation, accidental exposure was a significant concern because sesame could appear unlisted in ingredients like “natural flavors” or “spice blend.”
Storage and Shelf Life
Sesame oil lasts longer than many other cooking oils thanks to its lignans, which act as natural antioxidants and slow the chemical breakdown that causes oil to go rancid. In oxidation testing, blending sesame oil with less stable oils nearly doubled their shelf life at room temperature, from about 110 days to 193 days, without adding any synthetic preservatives. Pure sesame oil stored in a cool, dark place typically stays fresh for six months to a year after opening. Toasted sesame oil, because it’s unrefined, is slightly less stable and benefits from refrigeration once opened. You’ll know it’s gone off when it smells sharp or bitter instead of nutty.