ฆome agencies have issued warnings regarding creatine supplementation. For example, in 2001, a French food authority declared that creatine supplementation could increase the risk of developing cancer. however, other health educators have disputed these claims and blamed them on a faulty interpretation of animal studies. To date there is little evidence that creatine supplementation poses problems in healthy people. A few cases of kidney complications have been reported in medical journals but, typically, the athletes involved had pre-existing problems.