3. Monosodium glutamate
Commonly known as MSG, this flavor enhancer is a popular addition to soups, salad dressings, frozen entrees, chips and many types of restaurant foods. Studies have revealed MSG to be an excitotoxin which is a substance responsible for overexciting cells to the extent of damage or death.
MSG is believed to impact neurological brain pathways and disengage the satiation factor which is why this additive is commonly linked with weight gain. Some other symptoms associated with regular MSG use can include headaches, nausea, flushing and heart palpitations among others.