Healthy Fats for Keto: What to Cook With and What to Skip
The best fats for cooking, drizzling, and eating raw — plus why you should stop worrying about saturated fat.
Medically reviewed by Elena Marsh · Certified Nutrition Coach (NASM-CNC)
Every article on Keto Kitchen Hub is fact-checked against peer-reviewed research and reviewed by a registered dietitian before publication. This content is for educational purposes and is not medical advice.
Fat is 70–80% of your keto calories, so quality matters. Not all fats are equal — some are stable at high heat, some belong on salads, and some are best avoided regardless of your diet.
Best for high-heat cooking
- Butter and ghee — smoke points 350°F / 480°F respectively
- Avocado oil — smoke point 520°F, neutral flavor
- Beef tallow and duck fat — smoke point 400°F, extraordinary flavor
- Coconut oil — smoke point 350°F, distinct flavor
Best for salads and finishing
- Extra virgin olive oil — the gold standard
- Flaxseed oil (never heat) — high omega-3s
- Walnut oil (never heat) — nutty, expensive, delicious
- MCT oil — used cold in coffee or dressings
Fats to skip
- Corn, soybean, safflower, sunflower, cottonseed, canola oil — highly processed seed oils
- Margarine and vegetable shortening
- Any oil labeled 'partially hydrogenated'
Why we don't fear saturated fat
The mid-20th-century link between saturated fat and heart disease has been substantially revised by modern research. Multiple meta-analyses of large cohorts have not found a clear causal link. Individual response varies; monitor your lipids and discuss with a physician.
The best fat storage practices
- Olive oil: dark bottle, cool cabinet, use within 6 months of opening
- Nut oils: refrigerate after opening; they oxidize quickly
- Butter: fridge for 3 weeks, freezer for a year
- Bacon fat: strain, refrigerate, use within 6 weeks
Frequently asked questions
Can I reuse cooking oil?
Once for shallow frying; discard after. Repeated heating creates oxidized compounds.
Is coconut oil bad because it's saturated?
The debate is ongoing; moderate use fits most keto diets. Variety in fat sources is likely healthier than any single oil.
References
Dr. Julian Reyes, RD
Nutrition Reviewer · PhD Nutritional Sciences, Registered Dietitian
Julian reviews every article for scientific accuracy and appropriate scope. He researches metabolic health and lipid metabolism in academic and clinical settings.