Soybean oil is the most widely consumed vegetable oil in the United States and one of the most versatile. It shows up in everything from salad dressings and deep fryers to biodiesel fuel, livestock feed, printing inks, and skincare products. The U.S. alone produced 28.6 billion pounds of soybean oil in the 2024/25 marketing year, and global trade reached 12.6 million metric tons, with Argentina, Brazil, and the United States leading exports.
Cooking and Food Manufacturing
Food processing is the single largest use for soybean oil worldwide. Its mild, neutral flavor makes it a go-to for frying, sautéing, and baking, while its affordability keeps it dominant in large-scale food manufacturing. Refined soybean oil has a smoke point of about 234°C (453°F), which is high enough for deep frying, stir-frying, and most high-heat cooking methods without breaking down quickly.
Beyond home kitchens, soybean oil is a core ingredient in packaged foods you probably buy regularly. It serves as the base oil in many commercial salad dressings, mayonnaise, and marinades. It’s blended into margarine and shortening to provide structure and moisture in baked goods. Snack chips, crackers, and frozen foods frequently list it on their ingredient labels. If you pick up a processed food in a U.S. grocery store and check the back, there’s a good chance soybean oil is in it.
Nutritional Profile
Soybean oil is predominantly polyunsaturated fat. Per 100 grams, it contains roughly 58 grams of polyunsaturated fat, 23 grams of monounsaturated fat, and 16 grams of saturated fat. The dominant fatty acid is linoleic acid, an omega-6 fat that makes up 48% to 58% of the oil. It also contains 4% to 11% alpha-linolenic acid, an omega-3 fat, which is higher than most common cooking oils like corn or sunflower oil.
That fat composition has practical health implications. Clinical evidence shows that replacing saturated fats in your diet with soybean oil lowers circulating cholesterol levels and reduces coronary heart disease risk. Research also indicates it does not increase markers of inflammation or oxidative stress. The omega-6 to omega-3 ratio is relatively high, which some nutrition researchers flag as a concern in diets already heavy in omega-6 fats, but the oil’s overall effect on cardiovascular markers appears favorable when it replaces butter, lard, or other saturated fat sources.
Biodiesel and Industrial Products
Soybean oil is a major feedstock for biodiesel production, which has become one of its fastest-growing uses. The oil can be chemically converted into a fuel that works in standard diesel engines, and U.S. policy incentives for renewable fuels have significantly increased demand in this sector. This “green diesel” application now competes with food use for a growing share of the soybean oil supply.
Beyond fuel, soybean oil finds its way into a surprising range of industrial products. It’s used in soy-based printing inks, which produce brighter colors and are easier to recycle than petroleum-based inks. It serves as a base for environmentally friendlier hydraulic fluids and lubricants. Soybean oil also appears in plasticizers (which make plastics more flexible), adhesives, solvents, and certain types of foam insulation. Its appeal in these applications comes from being renewable, biodegradable, and cheaper than many petroleum alternatives.
Animal Feed and Livestock Nutrition
Soybean oil is a concentrated energy source in livestock diets. Dairy farmers, poultry producers, and swine operations add it to feed rations to boost caloric density without increasing the total volume of feed animals need to eat. A typical inclusion rate for dairy cows is around 2.5% of total dry matter intake, which raises the fat content of the diet from roughly 3.5% to about 5.7%.
This energy boost can partly compensate when animals eat slightly less total feed, as the higher calorie content of the oil makes up the difference. In dairy cows specifically, adding soybean oil to the diet also shifts the fatty acid profile of the milk, increasing certain fats that may be more nutritionally favorable for human consumption. It’s used as a primary omega-6 source in animal nutrition research and commercial feed formulations alike.
Skincare and Cosmetic Products
Soybean oil has a well-documented role in topical skincare. It helps strengthen the skin’s moisture barrier, the outer layer that prevents water loss and keeps irritants out. In clinical testing, applying soybean oil to the skin produced a significant decrease in transepidermal water loss (how much moisture escapes through the skin) within just 30 minutes of application.
Longer-term use shows even broader benefits. In one study, three weeks of daily application of a soybean oil-based body wash led to significant improvements in skin dryness on forearms, elbows, and legs, along with reduced skin hyperpigmentation. Moisturizers containing soybean extracts have also been shown to improve skin pH after a month of regular use. You’ll find soybean oil in body lotions, face creams, cleansers, and lip balms. Soybean-derived phosphatidylcholine, a fat extracted from the oil, is also used in liposomal skincare formulations designed to deliver active ingredients deeper into the skin. Products formulated for people with mild to moderate eczema have incorporated soybean oil for its barrier-repair properties.
Shelf Life and Storage
One trade-off of soybean oil’s high polyunsaturated fat content is that it oxidizes faster than more saturated oils like coconut or palm oil. Polyunsaturated fats are chemically less stable, meaning they react with oxygen more readily. Under accelerated testing conditions at elevated temperatures, stripped soybean oil (with natural antioxidants removed) showed an oxidation induction period of just 1 to 2 days. Commercially sold soybean oil retains its natural antioxidants like vitamin E, which extends shelf life considerably, but it still benefits from proper storage.
To get the most life out of a bottle, keep it sealed, stored in a cool and dark place, and use it within several months of opening. If the oil develops an off smell or tastes bitter or stale, it has likely gone rancid. For food manufacturers, this oxidation tendency is why soybean oil is sometimes partially hydrogenated or blended with more stable oils, though the trend has moved away from hydrogenation due to concerns about trans fats.