Shaklee Products: Purity, Potency, Performance. Purity: Quality ingredients, safe products. The ingredients used in our exclusive formulas go through an incredibly stringent screening process that surpasses even the pharmaceutical standards of the United States Pharmacopeia (USP). Our purity standards are some of the toughest in the nutrition industry to guarantee that all of our products are 100% safe. Potency: Extensive studies, effective ...