6 mistakes that destroy the benefits of even the best cooking oils

Sunflower, corn, olive, flaxseed, and other plant-based oils are essential ingredients in nearly every kitchen. Most households keep at least a few varieties on hand. These oils are used in baking, salad dressings, sauces, marinades, and side dishes. In short, plant-based fats are versatile and indispensable in cooking.

However, the quality of oil plays a major role in the taste, aroma, nutritional value, and health benefits of food. What many people overlook is that oils require specific storage and usage conditions. Failing to follow them can reduce shelf life, spoil the oil, or even make it toxic and harmful to your health.

Most common mistakes that kill the benefits of vegetable oils

Even the freshest, cold-pressed, and high-quality oil can become unhealthy or dangerous if used or stored incorrectly. Below are six common mistakes that can destroy the value of even the best oils:

• Using the wrong oil for cooking, frying, or baking.  Best oils for high-heat cooking include camelina, corn, and mustard oil — they have a high smoke point. Using oils like flaxseed or pumpkin seed oil for frying is a mistake. These delicate oils break down under heat, losing omega fatty acids and fat-soluble vitamins, and producing harmful compounds similar to carcinogens.
• Reusing oil for cooking. No matter how good the oil is, reheating it leads to the formation of toxic compounds. These substances can trigger inflammation and even increase the risk of cancer.
• Storing oil in direct sunlight. Most oils made from nuts or seeds are rich in vitamin E. When exposed to UV light, this antioxidant breaks down and forms harmful radicals. Always store oils in dark, cool places, away from sunlight.
• Letting oil come into contact with air. If the bottle is left open, oxygen interacts with the oil, causing oxidation. This results in a bitter taste, an unpleasant odor, and the formation of harmful substances like peroxides, aldehydes, and ketones.
• Storing oil in the wrong place. Your kitchen might not be the best place for oil, especially near appliances that emit heat. Higher temperatures accelerate oxidation. The best place to store oil is in the main section of the refrigerator, where it remains cool and dark.
• Using the wrong type of container. Natural cold-pressed oil is a «living product» that reacts with its environment. It should never be stored in plastic bottles — microplastics can leach into the oil. Avoid metal containers too, as they promote oxidation. Best choice: dark glass bottles or glazed ceramic containers.

CraftOil natural oils – for health, energy and beauty

CraftOil produces a wide range of fresh, cold-pressed, and flavorful natural oils. Try our delicate flaxseed oil, zesty mustard oil, aromatic black cumin seed oil, hazelnut oil, and sweet poppy seed oil – all made fresh to order.

Every oil is pressed the same day it’s ordered, then poured into eco-friendly glass bottles (100 ml, 250 ml, or 500 ml) and shipped across Ukraine and Europe.

CraftOil also offers certified seeds, grains, and nuts for cooking, sprouting, or oil pressing. Need help choosing the right product? Just leave a request on our website.