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When shopping for cooking oils, options like canola, corn, and vegetable oils are often inexpensive and commonly found in kitchens. However, these oils may not be the healthiest choice, particularly when exposed to high heat. Let’s explore why these oils may not be ideal for your health.
Canola, corn, and vegetable oils are typically high in omega-6 fatty acids. While omega-6 is essential for the body, the typical Western diet already provides an excessive amount. Too much omega-6 can disturb the balance with omega-3 fatty acids, leading to increased inflammation in the body. This imbalance has been associated with various health issues, such as heart disease, obesity, and other inflammatory conditions.
The refining process of oils like corn, soy, or vegetable oil involves high heat and chemical solvents such as hexane. This intense refining strips away beneficial nutrients and antioxidants found in raw oils, leaving behind a more processed product with fewer health benefits.
These oils also have relatively low to moderate smoke points, meaning they break down and burn at lower temperatures. Once they reach their smoke point, they release harmful compounds like free radicals and acrolein. These toxic substances not only affect the flavor of your food but can also pose health risks. Cooking at high temperatures, such as frying, with these oils can result in the formation of unhealthy compounds.
Furthermore, the refining process can produce small amounts of trans fats in these oils. Trans fats are known to raise bad cholesterol (LDL) and lower good cholesterol (HDL), increasing the risk of heart disease, stroke, and type 2 diabetes. Even in trace amounts, trans fats can be harmful over time.
If you’re looking for healthier alternatives, consider oils that are less processed and more stable at high temperatures: