In a recent survey of the performance-enhancing claims made for dozens of fitness products, researchers found not a single one that could be supported by rigorous scientific research. Moreover, the fitness products that have been thoroughly evaluated appear to have no effect on strength, endurance, speed or reduced muscle fatigue.
“All the companies say they’ve got a scientific basis for these products,” said the senior author, Dr. Matthew Thompson, a senior clinical scientist at the University of Oxford. “That sounds good until you look at it with an objective scientific point of view.”
