SupplementsProprietary blends: what supplement labels are allowed to hideUS rules require a proprietary blend to list its ingredients by weight order and its total weight — but not a single individual amount.Gordon FieldingApril 9, 2026
SupplementsHeavy metals in protein powders: what the testing foundIndependent tests of protein powders have detected cadmium, lead, arsenic and mercury at varying levels — mostly trace, occasionally elevated, and never zero.Gordon FieldingFebruary 23, 2026