Hey there, Yoni.
The impurities as well as the casein, which is the part of milk which causes allergic reaction, are removed to make whey, so I imagine this would be safe. But I would still treat it as a test food just to be certain. I’m assuming the protein drink contains no sugar.
In several studies, a particular part of whey protein called lactoferrin was shown to inhibit certain yeasts, bacteria, and intestinal parasites. It was concluded that lactoferrin could be an important part of the immune defense against Candida C. albicans, an especially strong type of Candida.
As far as the cocont flour bread is concerned, you can use either or a mixture of both of the following, brown rice bran flour and milled flax seed.