Whey Protein is the liquid by-product of cheese, that lurks around after milk has been curdled and strained. It helps your cells grow, replace and repair themselves. Your body makes some of it’s own protein, but needs 9 essential amino acids from foods sources to complete the processes efficiently. Whey is one such food source that is absorbed rapidly to build and repair muscle cells. 

For best results, the best time to use whey protein is a 30g amount of before and after resistance training. In terms of amounts more, isn’t better. The pre and post workout windows of around 30 min before abd after are times to use around 30g of whey protein.

There are no real side effects except general stomach intolerance, and if this is the case then try and alternative protein like, Pea, Rice or Hemp Protein.