The cooking oil debate has become surprisingly heated in recent years. Social media is full of claims about 'toxic' seed oils, while the wellness industry pushes coconut oil as a cure-all. Decades of nutritional research tell a more nuanced story. Here's what the evidence actually shows — and how to make sensible choices for your kitchen.
Extra Virgin Olive Oil: The Gold Standard
Extra virgin olive oil remains the most studied cooking oil in nutrition science, with consistently positive findings across thousands of clinical trials and population studies. It's rich in monounsaturated oleic acid and polyphenols — powerful antioxidants that reduce cardiovascular risk, lower inflammation markers, and appear to protect cognitive function as we age. The Mediterranean diet, which uses EVOO as its primary fat, is associated with reduced risk of heart disease, stroke, type 2 diabetes, and certain cancers.
Despite widespread myths, EVOO is entirely suitable for everyday cooking. Its smoke point of 190–215°C comfortably handles sautéing, roasting, and even most baking. The key is choosing quality: look for "extra virgin" on the label (meaning cold-pressed without heat or chemicals), dark glass bottles to protect from light degradation, and ideally a harvest date within 18 months. The flavour varies considerably by origin — Spanish EVOOs tend to be milder and buttery, Italian varieties more grassy and robust, Greek oils often peppery and intense. All are excellent.
Coconut Oil: More Complicated Than the Hype Suggests
Coconut oil is approximately 82% saturated fat — higher than butter. When saturated fat was universally condemned, this made coconut oil a dietary villain. The picture is more complex. The dominant saturated fat in coconut oil is lauric acid, a medium-chain fatty acid that behaves differently from the long-chain saturated fats in animal products. Lauric acid raises HDL (good) cholesterol alongside LDL, meaning its net effect on cardiovascular risk ratios is less alarming than its saturated fat content implies.
However, the evidence base for coconut oil is considerably thinner than for olive oil. It lacks the polyphenol content that makes EVOO genuinely protective, not merely neutral. Use it where the flavour works — Thai and South Asian curries, certain baking applications, Southeast Asian recipes where coconut is traditional. For general everyday cooking, better options exist.
Seed Oils: The Social Media Villain That Deserves a Fairer Hearing
Sunflower, rapeseed, corn, and vegetable oils — collectively branded 'seed oils' by wellness influencers — are high in polyunsaturated omega-6 fatty acids. The concern is that these oils oxidise at high temperatures, producing aldehydes and other potentially harmful compounds. This is technically true, but the evidence that this is meaningfully harmful at normal home cooking temperatures is limited.
What is well-established is that the modern Western diet is heavily skewed toward omega-6 fatty acids relative to omega-3s, and this imbalance does contribute to a pro-inflammatory state. But the problem isn't primarily home cooking — it's the vast quantities of refined seed oils in ultra-processed foods consumed daily. The occasional home stir-fry in sunflower oil is not the culprit.
Cold-pressed rapeseed oil deserves particular mention as an excellent UK-produced option. It's high in omega-3 alpha-linolenic acid, has a more favourable omega-6 to omega-3 ratio than most seed oils, and its mild nutty flavour works well in both cooking and dressings. It's arguably the most nutritionally complete everyday cooking oil for British kitchens.
Smoke Points: Important, But Overrated
Every oil has a smoke point — the temperature at which it begins to break down and smoke. Beyond this point, flavour deteriorates and some harmful compounds form. For most home cooking — sautéing vegetables, roasting at 180°C, pan-frying — you rarely approach smoke points. Only deep-frying genuinely requires a high-smoke-point oil.
A practical guide: for deep-frying, refined groundnut or sunflower oil works well. For everyday cooking and roasting, EVOO or cold-pressed rapeseed oil are ideal. For dressings and finishing, high-quality EVOO brings flavour that no refined oil can match.
Practical Kitchen Guidance
- Best all-rounder: Cold-pressed rapeseed oil — high smoke point, excellent nutrition, British-grown
- Best for flavour and health: Extra virgin olive oil — for dressings, finishing, lower-heat cooking
- For specific cuisines: Coconut oil, sesame oil, and walnut oil where the flavour is appropriate
- Avoid: Old oil that has been repeatedly heated, cheap blended "vegetable oils" consumed in large quantities through processed food
The real nutritional story isn't which oil you cook with — it's what you're cooking. Vegetables, fish, pulses, and whole grains cooked in decent oil will always outperform nutrient-poor food cooked in "perfect" oil. Keep it simple, buy quality, and don't reheat oil repeatedly.
Get These Nutrients Through Vanda's Kitchen
Understanding cooking oils and health is the first step. The practical next step is ensuring your daily diet actually delivers the nutrients your body needs. For City of London workers, Vanda's Kitchen's freshly prepared Filipino-inspired lunch provides a genuinely nutritious alternative to the processed options that dominate the EC4 lunch scene. Our food is built around lean proteins, fresh vegetables, and complex carbohydrates — a natural source of the nutrients that cooking oils and health research identifies as important.
Our certified halal, 100% nut-free kitchen near St Paul's Cathedral delivers to offices across the City. Every item is freshly prepared and fully allergen-labelled. For a genuinely nutritious working lunch, see our healthy office lunch delivery guide and view our team lunch options.
For related reading, see the Mediterranean diet and macronutrients explained. WhatsApp us or order for your team today.