Frequently Asked Questions

Unrefined oils, also called cold-pressed or extra virgin, are extracted mechanically without heat or chemicals, preserving their natural flavour, aroma, and nutritional compounds. They contain more antioxidants and polyphenols but have lower smoke points, making them better for low-heat cooking, dressings, and drizzling. Refined oils undergo processing with heat and chemicals to remove impurities, resulting in a neutral taste and higher smoke points suitable for high-heat cooking. While refined oils are more heat-stable, they lose some of their beneficial compounds during processing. Choose unrefined oils when flavour and nutrition matter most, and refined varieties for high-temperature cooking applications.

The smoke point is the temperature at which an oil begins to break down and produce smoke, releasing harmful compounds and losing its nutritional value. Different oils have different smoke points based on their composition and processing method. Extra virgin olive oil has a lower smoke point (around 160–190°C) and is ideal for low to medium-heat cooking and finishing dishes. Refined oils like canola and sunflower oil have higher smoke points (200–230°C), making them suitable for stir-frying and baking. Using an oil below its smoke point preserves its health benefits and prevents the formation of free radicals and trans fats. Understanding smoke points helps you select the right oil for each cooking method, whether you're sautéing, roasting, or preparing salad dressings.

Coconut oil is primarily composed of saturated fat, specifically medium-chain triglycerides (MCTs), which are metabolised differently than other saturated fats. Some research suggests MCTs may offer modest metabolic benefits, but coconut oil shouldn't replace other healthy fats in your diet. It contains lauric acid, which may have some beneficial properties, but the overall saturated fat content means it should be used moderately. Virgin coconut oil retains more antioxidants and flavour compared to refined varieties. While coconut oil has culinary uses and a moderate smoke point suitable for baking and medium-heat cooking, it's best enjoyed as occasional variety rather than your primary cooking fat. Balance it with monounsaturated and polyunsaturated fats for optimal nutrition.

Proper storage extends oil shelf-life and preserves its nutritional quality. Keep oils in cool, dark places away from direct sunlight, as UV light breaks down beneficial compounds and causes oxidation. Store bottles in a cupboard or pantry rather than on countertops or near windows. Unrefined oils are more susceptible to degradation and typically last 6–12 months when properly stored, while refined oils can last 1–2 years. Always use airtight containers to minimise exposure to oxygen, which accelerates rancidity. Some oils, particularly nut oils and flaxseed oil, benefit from refrigeration once opened. Check for signs of rancidity such as off-putting smells or unusual flavours, which indicate the oil should be discarded. Label bottles with opening dates to track freshness and rotate stock regularly.

Omega-3 and omega-6 are essential polyunsaturated fatty acids that your body cannot produce, so they must come from food sources. Omega-3 fatty acids, found in fatty fish like salmon and mackerel, flaxseeds, and walnuts, support heart health, brain function, and reduce inflammation. Omega-6 fatty acids, present in vegetable oils, nuts, and seeds, are also important but are consumed in much larger quantities in modern diets. The ideal ratio of omega-6 to omega-3 is approximately 4:1, though many people consume far more omega-6, which can increase inflammation. To balance this ratio, include fatty fish twice weekly, consume ground flaxseeds or chia seeds, and limit refined vegetable oils. Both are essential for different bodily functions, but balance and variety in your fat intake is key to optimal health.

Modern nutritional science shows that not all saturated fats are equal, and completely avoiding them isn't necessary for health. Saturated fats from whole foods like coconut, grass-fed butter, and full-fat dairy contain nutrients and compounds that offer some beneficial properties. The issue arises with excessive consumption and the quality of the saturated fat source. Trans fats, the most harmful type, should be avoided entirely as they are artificially created and have no nutritional benefit. Rather than strict avoidance, focus on moderation and quality. Aim for a balanced fat intake with the majority coming from monounsaturated and polyunsaturated sources, while keeping saturated fats to less than 10% of your daily calories. This approach is more sustainable and aligned with current dietary guidance for overall cardiovascular and metabolic health.

The Mediterranean diet emphasises olive oil as its primary fat source, complemented by fish, nuts, seeds, and moderate dairy consumption. This dietary pattern has been extensively studied and associated with positive health outcomes across Mediterranean populations for centuries. Extra virgin olive oil provides polyphenols and antioxidants that support cardiovascular health, while fatty fish supplies omega-3 fatty acids for brain and heart function. The diet limits processed foods and saturated fats from red meat and refined products, instead focusing on whole grains, legumes, vegetables, and fruits. This approach demonstrates that a diet rich in healthy fats, when combined with whole foods and regular physical activity, supports long-term wellness. The Mediterranean model offers practical, sustainable guidance for incorporating healthy fats into daily eating, making it a useful reference point for dietary choices.

Reusing cooking oil is possible but requires careful consideration. Each time oil is heated, it oxidises and breaks down, producing free radicals and potentially harmful compounds. If you choose to reuse oil, strain it through a fine mesh or cheesecloth to remove food particles that accelerate degradation. Only reuse oil that hasn't been heated to smoking point, and limit reuse to 1–2 additional times at most. Discard oil if it appears dark, smells unpleasant, or has been used for frying foods with strong flavours. For environmental and health reasons, it's preferable to use fresh oil for each cooking session, especially for high-heat applications. Properly dispose of used oil by collecting it in a container and taking it to a recycling facility rather than pouring it down the drain, which can damage plumbing and harm water systems.

Yes, nut butters such as almond butter, peanut butter, and cashew butter provide excellent sources of monounsaturated and polyunsaturated fats alongside protein and fibre. They also contain vitamins, minerals, and antioxidants that support overall nutrition. When selecting nut butters, choose varieties with minimal added ingredients—ideally just nuts and salt, without added sugars or hydrogenated oils. Natural nut butters may separate slightly as the oil rises to the top, which is a sign of minimal processing and quality. A two-tablespoon serving provides approximately 16 grams of fat plus protein and fibre, making nut butters satisfying and nutrient-dense. Include them in breakfasts with whole grain toast, blend into smoothies, or use as a snack with fresh fruit. While nutritious, nut butters are calorie-dense, so portion control remains important. People with nut allergies should explore seed butters like tahini or sunflower seed butter as alternative sources of healthy fats.

Dietary guidelines typically recommend that 25–35% of your daily calories come from fat, with emphasis on healthy unsaturated varieties. For a 2,000-calorie diet, this translates to approximately 55–78 grams of total fat daily. However, individual needs vary based on age, activity level, health status, and personal goals. Rather than focusing exclusively on total fat grams, prioritise fat quality by consuming more monounsaturated and polyunsaturated fats from sources like olive oil, fatty fish, nuts, and seeds. Limit saturated fats to less than 10% of daily calories and avoid trans fats altogether. Keep in mind that fats are calorie-dense (9 calories per gram compared to 4 for protein and carbohydrates), so portion awareness helps with overall energy balance. Consulting a registered dietitian can provide personalised guidance based on your specific health needs, dietary preferences, and fitness objectives. Balance, variety, and whole food sources are more important than hitting exact numbers.

Trans fats are artificially created fats produced by adding hydrogen to liquid vegetable oils through a process called hydrogenation, which extends shelf life and improves texture in processed foods. Unlike naturally occurring fats, trans fats offer no nutritional benefit and significantly harm cardiovascular health by raising harmful LDL cholesterol while lowering beneficial HDL cholesterol. Extensive research links trans fat consumption to increased risks of heart disease, stroke, and inflammation. Many countries have restricted or banned trans fats in commercial food production due to these risks. Check food labels for "partially hydrogenated oils" or "trans fats" and avoid products containing these ingredients, particularly in baked goods, margarine, fried foods, and certain snacks. Reading ingredient lists carefully helps you identify and eliminate trans fats from your diet. Choosing whole foods and products made with natural oils instead of hydrogenated fats is one of the most important dietary choices you can make for long-term cardiovascular and metabolic health.