Ever since I got a new protein, after taking it Ihave a metallic taste to my mouth. Obviously, there is no metal init, and I don't understand where does this aftertaste come from. Isit bad for the health, or it is just the taste?
Sounds nasty. Just switch brands. It must be some type of artificial flavouring or something causing the aftertaste. Try out Whey To Build Muscle from n2bm. It is a pure whey isolate without any of those fake ingredients. They only use stevia as a sweetener.
Most probably this taste is caused by some artificial sweeteners, or other additives. I would change the protein product, because this effect definitely can not take place with a high quality product.