Some protein powders and shakes contain unsafe levels of lead, according to a Consumer Reports investigation .  In the report, published Tuesday, Consumer Reports analyzed 23 protein powders and shakes — a range of dairy, beef and plant-based protein supplements — and found that more than two-thirds of the products contained more lead in a single serving than what experts say is safe to consume, about 0.5 micrograms per day. "Protein powders and shakes have become immensely popular and are part