High oleic safflower oil is a type of safflower oil bred to contain predominantly oleic acid, a monounsaturated fat, instead of the linoleic acid (a polyunsaturated fat) that dominates standard safflower oil. Standard safflower oil is about 71 to 75% linoleic acid and only 16 to 20% oleic acid. High oleic varieties flip that ratio, pushing oleic acid content to roughly 75 to 80% or higher. This single change gives the oil a different fat profile, better heat stability, and a longer shelf life.
How It Differs From Regular Safflower Oil
The difference comes down to one fatty acid. Regular (sometimes called “linoleic” or “Type I”) safflower oil is rich in omega-6 polyunsaturated fat. High oleic (“Type II”) safflower oil is rich in monounsaturated fat, the same category of fat that makes olive oil a staple of heart-healthy diets. Both oils come from the same plant species, but the seeds have been bred to produce a very different balance of fats.
In practical terms, this means the two oils behave differently in the kitchen and in your body. High oleic safflower oil is more chemically stable because monounsaturated fats resist oxidation better than polyunsaturated fats. It also has a neutral flavor, a light texture, and a high smoke point, which makes it popular for frying, baking, and processed foods where a clean taste matters.
Why Oleic Acid Matters for Stability
Polyunsaturated fats have multiple weak points in their chemical structure where oxygen can attack, causing the oil to go rancid. Monounsaturated fats like oleic acid have only one such point, which makes them far more resistant to breaking down. This is measurable: conventional high oleic safflower oil lasts about 13 hours in a standard oxidative stability test at 110°C, compared to just 3.2 hours for regular linoleic safflower oil. Newer “super high oleic” varieties developed through advanced breeding push that number past 50 hours, making them among the most stable vegetable oils available.
For you, this translates to oil that holds up better during cooking at high temperatures, produces fewer harmful breakdown products when heated, and stays fresh longer in your pantry.
Not a GMO Product
High oleic safflower varieties were developed through traditional plant breeding, not genetic engineering. The trait traces back to a natural genetic event: a wild relative of safflower (Carthamus palaestinus) passed a version of a key fat-producing gene into cultivated safflower through natural cross-pollination. A mutation in that gene reduced the plant’s ability to convert oleic acid into linoleic acid, so oleic acid accumulated in the seeds instead. Breeders at UC Davis identified this trait and released the first commercial high oleic safflower variety, called “UC-1,” in 1966. Every high oleic safflower variety since has been developed using conventional breeding and selection from that same genetic origin.
Cholesterol and Heart Health Effects
Replacing saturated fats with high oleic oils produces meaningful improvements in blood lipids. A systematic review of clinical trials found that when high oleic oils replaced saturated fats, LDL (“bad”) cholesterol dropped by an average of 10.9% and total cholesterol fell by about 8%. HDL (“good”) cholesterol generally stayed the same. When high oleic oils replaced trans fats, the results were even more dramatic: LDL cholesterol dropped 9.2%, triglycerides fell 11.7%, and HDL cholesterol actually increased by about 5.8%.
One important nuance: when high oleic oils replaced oils already high in omega-6 polyunsaturated fats (like regular safflower oil or soybean oil), cholesterol levels didn’t change much in either direction. The cardiovascular benefit comes specifically from using high oleic oil instead of more harmful fats, not from any magic property of the oil itself.
The FDA recognizes this evidence. It allows food labels to carry a qualified health claim stating that about 1½ tablespoons (20 grams) per day of oils high in oleic acid, when used to replace saturated fat without increasing total calories, may reduce the risk of coronary heart disease. The agency characterizes this evidence as “supportive but not conclusive.”
Effects on Blood Sugar and Body Composition
A crossover study in obese postmenopausal women with type 2 diabetes found that daily safflower oil supplementation for 16 weeks reduced HbA1c (a measure of long-term blood sugar control) by 0.64 percentage points, a clinically significant improvement. Insulin sensitivity also improved. Participants lost about 1.6 kg of trunk fat while gaining 1.0 kg of lean mass, even though their overall body weight and BMI didn’t change. The researchers noted 16 weeks as the minimum supplementation period needed to see these metabolic effects.
These findings came from a single study and involved linoleic-type safflower oil specifically, so they shouldn’t be generalized too broadly. But the results suggest safflower oil may have metabolic effects beyond its basic fat profile.
How It Compares to Olive Oil
High oleic safflower oil and olive oil share a similar monounsaturated fat profile. Both are dominated by oleic acid. Where they diverge is in everything else. Extra virgin olive oil contains a range of antioxidants, polyphenols, and vitamins that safflower oil simply doesn’t have. Safflower oil’s main micronutrient is vitamin E, and beyond that, it’s nutritionally spare.
The trade-off is versatility. Safflower oil has a neutral flavor and higher smoke point, making it better suited for frying, baking, and any recipe where you don’t want the oil’s taste to come through. Olive oil brings its own distinct flavor and works best at lower temperatures or in uncooked applications like dressings. If your priority is overall nutritional density, olive oil wins. If you need a clean, heat-stable cooking oil with a heart-healthy fat profile, high oleic safflower oil is a strong choice.
Where You’ll Find It
High oleic safflower oil shows up in two places: as a bottled cooking oil and as an ingredient in processed foods. Food manufacturers favor it because its stability means longer shelf life for snack foods, baked goods, and anything fried. It replaced partially hydrogenated oils (a source of trans fats) in many products after the FDA’s 2018 ban on artificial trans fats. On ingredient labels, it typically appears as “high oleic safflower oil,” though some labels simply say “safflower oil.” Checking the nutrition panel for monounsaturated versus polyunsaturated fat content will tell you which type you’re getting. If monounsaturated fat is the dominant fat listed, it’s the high oleic variety.