[zhte415]

Whey powder.

A large tub, about 5kg, is inexpensive, about $50. Just search on Amazon or eBay.

But, it's a supplement. Can't like on whey alone.

[steve19]

Be very careful buying cheap protein from unknown suppliers. The chemicals used to cheat protein tests are very toxic.

https://en.m.wikipedia.org/wiki/Protein_adulteration_in_Chin...

https://en.m.wikipedia.org/wiki/Melamine