Does the milk we buy have hormones?
No. The process of pasteurisation, which milk is subjected to, destroys about 90% of rbST before we drink it. When cow’s milk is used to make baby formula, any rbST or IGF-I it may contain is completely denatured (changed irreversibly).
The combination of digestion of rbST and IGF-I and heat treatments such as pasteurisation and boiling, renders cow’s milk and infant formulas made from cow’s milk safe from hormonal effects.