How do i know exactly what does drinking whey protein do for you?

Many benefits: Whey protein has many benefits.It's an easily digested form of protein.It can enhance immune function, support detoxification, prevent osteoporosis, raise hdl, balance sugar & increase production of the antioxidant glutathione. I advise whey from grass-fed cows processed at low temperature such as whey cool: http://www.Rockwellnutrition.Com/p-designs-for-health-whey-cool-vanilla-organic-whey-protein.