What factor determines the amount of food you should consume from a food type

9, 5, 10000000 ( that is supposed to be a ten for the last one)

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.