Is gold standard whey protein powder kosher for Passover???
Ingredients: Protein Blend(Whey Protein Isolate, Whey Protein Concentrate, Whey Peptides), Artificial Flavor, Lecithin, Acesulfame Potassium.
I cannot say that it is kosher for passover. In fact it contains lecithin, which is kitniot, and not permitted for askenazim and some sefardim. Regarding the other ingredients, the production line etc., as a general rule, it would need to have kosher supervision.