Polyunsaturated fats are the absolute WORST oils to use when cooking because these omega-6-rich oils are highly susceptible to heat damage.
- Corn
- Soy
- Safflower
- Sunflower
- Canola
Damaged omega-6 fats or trans-fats are disastrous to your health, and are responsible for far more health problems than saturated fats ever were by clogging your arteries & raising LDL cholesterol.
This is formed when vegetable oils are hardened into margarine or shortening.
There is no safe level of trans-fat consumption. Use pure virgin coconut oil for cooking which is stable at high temperature.