Comment by textor

You're being petty, rude and irrational. I expect there to be more issues than biotinidase deficiency with you. Do you have any data about the prevalence of this disease? Quick search points to something below 1 in 100 thousand. This means there's about 3000 sufferers like you in the entire country. Statistically speaking, it's utterly absurd for you to throw accusations or demand some special attention from the author of a paper that reports robust positive effects of exercise based on 1.2 million subjects. Take your biotin or something and pipe down.