Extra virgin olive oil (EVOO) and canola oil have the most robust clinical evidence for improving cholesterol and maintaining chemical stability during cooking.1 Both lower LDL. EVOO’s polyphenols provide additional oxidative protection at frying temperatures. Coconut oil and palm oil lack these benefits and raise LDL via saturated fat content.
What “healthy” oils are hurting my cholesterol?
A 2024 review confirmed that tropical oils, coconut and palm, raise serum total cholesterol and LDL in metabolic syndrome patients due to their saturated fat content.1
The coconut oil MCT claim: lauric acid, the dominant fat in coconut oil, does not behave like the purified medium-chain triglycerides (MCTs) used in clinical research. In practice, it raises LDL in a pattern consistent with other saturated fats.
Palm olein (the liquid fraction of palm oil) has a more complex lipid profile than standard palm oil due to positional fat distribution, but it still lacks the cardioprotective benefits of unsaturated oils.
| Oils that help lower LDL & Total Cholesterol | Oils that may increase LDL & Total Cholesterol |
| Canola Oil | Coconut Oil (Lauric acid ≠ pure MCT) |
| Virgin Olive Oil | Palm Oil (Distinguished from Palm Olein) |
| Rice Bran Oil | Butter |
Is it safe to fry with these oils?
When you fry food, temperatures typically reach between 150–190 °C. At these heats, oils undergo complex chemical changes called thermoxidation and polymerization. Essentially, the oil reacts with oxygen and heat to break down into new compounds that can thicken the oil or create a “varnish” on your pans.
Extra Virgin Olive Oil (EVOO) is considered a premium frying oil.2 Its high content of monounsaturated fats and natural antioxidants—specifically polyphenols—gives it exceptional oxidative stability. These polyphenols are crucial because they actively inhibit the formation of secondary oxidation products, effectively protecting the oil from degrading into harmful substances.
As a general rule for frying safety, look for oils with a linolenic acid level below 3%. Oils rich in polyunsaturated fats (PUFAs) that exceed this threshold, such as traditional sunflower or soybean oil, are prone to forming “toxic breakdown products” called aldehydes when overheated or reused.
What oil can help me lose weight or lower my blood pressure?
Clinical data from recent reviews suggest that certain oils offer metabolic support that go far beyond just managing your cholesterol:
- Sesame Oil: Research indicates that sesame oil can improve blood sugar control (measured by HbA1c) and assist in weight reduction.1
- Flaxseed Oil: This oil is a powerhouse for heart health, with the potential to lower diastolic blood pressure.3 This is likely due to its high \alpha-linolenic acid (ALA) content, though it is very heat-sensitive and should never be used for cooking.
- Rice Bran Oil: This oil contains a unique compound called \gamma-oryzanol, a plant sterol that provides potent antioxidant activity and specific benefits for those with metabolic syndrome.2
- Canola Oil: There is moderate-certainty evidence that consistent use of canola oil can help reduce overall body weight and BMI.1
What to Look for on the Label
- “Virgin” or “Extra Virgin”: cold extraction preserves polyphenols and antioxidants — refining removes them
- “High-Oleic”: indicates a higher monounsaturated fat concentration, which resists heat and oxidation significantly better than standard versions
- Dark glass packaging: protects delicate fats from light-induced degradation; avoid clear plastic bottles for oils you will store
Kitchen Swap Guide
| Replace | With | Why |
| Coconut oil | Extra virgin olive oil | Higher oxidative stability; lowers LDL; polyphenol protection |
| Butter or lard | Canola oil | Reduces total cholesterol; supports weight management |
| Standard sunflower or soybean oil | High-oleic sunflower or rice bran oil | High-oleic resists aldehyde formation; rice bran adds γ-oryzanol |
| Standard salad dressing base | Flaxseed or sesame oil (cold) | ALA for blood pressure; lignans for HbA1c management |
References
- Voon PT, Ng CM, Ng YT, Wong YJ, Yap SY, Leong SL, Yong XS, Lee SWH. Health Effects of Various Edible Vegetable Oil: An Umbrella Review. Adv Nutr. 2024 Sep;15(9):100276. doi: 10.1016/j.advnut.2024.100276. Epub 2024 Jul 23. PMID: 39053603; PMCID: PMC11374968.
- Abrante-Pascual S, Nieva-Echevarría B, Goicoechea-Oses E. Vegetable Oils and Their Use for Frying: A Review of Their Compositional Differences and Degradation. Foods. 2024 Dec 23;13(24):4186. doi: 10.3390/foods13244186. PMID: 39767128; PMCID: PMC11675685.
- Fornari Laurindo L, Fornari Laurindo L, Dogani Rodrigues V, da Silva Camarinha Oliveira J, Leme Boaro B, Cressoni Araújo A, Landgraf Guiguer E, Rucco Penteado Detregiachi C, Maria Cavallari Strozze Catharin V, Federighi Baisi Chagas E, Cavallari Strozze Catharin V, Direito R, Barbalho SM. Evaluating the effects of seed oils on lipid profile, inflammatory and oxidative markers, and glycemic control of diabetic and dyslipidemic patients: a systematic review of clinical studies. Front Nutr. 2025 Feb 7;12:1502815. doi: 10.3389/fnut.2025.1502815. PMID: 39996006; PMCID: PMC11849496.
