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 nutrients. Our scientists find pure and potent ingredients from nature, spending thousands of hours reviewing scientific literature and conducting their own studies to verify efficacy. We use unique combinations of scientifically supported ingredients to create our exclusive formulas.