Love it or hate it, unless you seek out hormone-free options, the food you eat likely contains additional hormones. From meat to milk, hormones are added to increase productivity. Some are produced naturally by the foods themselves. We teamed up with our favorite registered dietitian Mary Hartley to look at foods containing hormones, what their effects might be and how you can avoid them.
Hormones are most commonly found in meat, milk and plants. In meat and milk, they are added through production. Steroid hormones are given to beef cattle to make them grow faster, build more muscle and make their meat leaner. Two-thirds of all cattle and about 90 percent of the cattle on feedlots in the United States are given hormones. Six steroid hormones are approved by the FDA for use in food production. They are: estradiol, progesterone, testosterone, zeranol, trenbolone acetate and melengestrol acetate. Steroid hormones are released into the animal from a pellet that is implanted under the skin of the ear. Due to federal regulations, these hormones can only be used on sheep and cattle.