Canola oil is generally the healthier choice for everyday cooking, mainly because it has less saturated fat, more omega-3 fatty acids, and nearly three times the plant sterols that help lower cholesterol. That said, peanut oil has real advantages for high-heat cooking and brings its own nutritional strengths. The better pick depends on how you’re using it.
Fat Composition at a Glance
The biggest nutritional difference between these two oils is their fat profile. Canola oil contains about 7.5% saturated fat, while peanut oil comes in at roughly 18%. That matters because replacing saturated fat with unsaturated fat is one of the most consistent dietary strategies for reducing heart disease risk. Both oils are high in monounsaturated fat (the same type that makes olive oil popular), but canola leads here too: 64% monounsaturated versus 49% in peanut oil.
Peanut oil does contain slightly more polyunsaturated fat overall (about 34% versus 28% for canola). But the type of polyunsaturated fat matters. Canola oil provides around 1,279 milligrams of alpha-linolenic acid per tablespoon, an omega-3 fat that most people don’t get enough of. Peanut oil contains very little omega-3. Instead, its polyunsaturated fat is almost entirely omega-6 (linoleic acid), which most Western diets already supply in excess.
Heart Health and Cholesterol
The American Heart Association’s 2026 dietary guidance specifically names canola oil alongside soybean and olive oils as examples of heart-healthy liquid plant oils. Peanut oil isn’t excluded from a healthy diet, but it doesn’t get the same explicit mention, largely because of its higher saturated fat content.
Canola oil also delivers significantly more phytosterols, plant compounds that block cholesterol absorption in the gut. Canola contains roughly 894 milligrams of total phytosterols per 100 grams, compared to about 320 milligrams in peanut oil. That’s nearly a threefold difference. While you’d need to consume phytosterols in larger amounts (typically 2 grams per day) to see a measurable drop in LDL cholesterol, the gap still tilts the long-term cardiovascular picture in canola’s favor.
Where Peanut Oil Wins: High-Heat Cooking
Peanut oil’s standout advantage is its smoke point. Refined peanut oil can handle temperatures up to 450°F (232°C), making it one of the best choices for deep frying, stir-frying, and searing. Refined canola oil smokes at around 400°F (204°C), which is still respectable for most cooking but less forgiving when you need intense, sustained heat.
That higher smoke point isn’t just about avoiding a smoky kitchen. When oil breaks down past its smoke point, it generates off-flavors and harmful compounds. Peanut oil also has a slightly nutty flavor that many cooks prefer for Asian dishes and fried foods, while canola oil is nearly tasteless, which makes it more versatile for baking and dressings where you don’t want the oil to assert itself.
Vitamin E and Antioxidants
Peanut oil is a meaningful source of vitamin E, delivering about 2.1 milligrams per tablespoon. That’s roughly 14% of the daily recommended intake from a single tablespoon. Vitamin E acts as an antioxidant, protecting cells from damage caused by free radicals. Canola oil contains vitamin E as well, though peanut oil typically provides a bit more per serving.
If you use cold-pressed or unrefined peanut oil, you’ll get an even richer antioxidant profile. Refining reduces the total tocopherol (vitamin E family) content by about 10%, and it strips away some of the polyphenols and other minor compounds found in crude peanut oil. Cold-pressed versions retain more of these, though they also have a stronger flavor and a lower smoke point than their refined counterparts.
Peanut Allergies and Refined Oil
If you or someone in your household has a peanut allergy, you might assume peanut oil is off-limits. For highly refined peanut oil, the risk is actually very small. The refining process removes nearly all detectable peanut protein, and controlled clinical challenges suggest the allergic risk from refined peanut oil is negligible. Protein levels in foods made with refined peanut oil fall below the detection limits of current testing methods.
Cold-pressed, unrefined, or gourmet peanut oils are a different story. These retain more protein and can trigger reactions. If allergy is a concern, stick with refined versions or choose canola oil to eliminate the question entirely.
Which Oil to Use When
- Deep frying and high-heat stir-frying: Peanut oil’s higher smoke point and characteristic flavor make it the stronger choice.
- Everyday sautéing and roasting: Either oil works well at typical oven and stovetop temperatures (350–400°F).
- Salad dressings and baking: Canola’s neutral taste lets other ingredients shine.
- Maximizing heart-health benefits: Canola oil’s lower saturated fat, higher omega-3 content, and greater phytosterol load give it a clear edge for daily use.
There’s no reason you can’t keep both in your kitchen. Using canola as your default and reaching for peanut oil when you need high heat or want that nutty depth is a practical way to get the best of both. But if you’re choosing just one bottle for general health purposes, canola oil has the stronger nutritional resume.