Proven by Science Changing Brands Can Change Your Life The Landmark Study, led by an acclaimed nutrition researcher with the University of California, Berkeley, is one of the largest studies of long-term users of multiple supplements. The study showed that people who used Shaklee supplements had much healthier biomarkers for heart, brain, and cognitive health compared to non-supplement or non-Shaklee product single-supplement users. 2 01 9 - 2 02 0 | 9