It also reduces lactic acid, which naturally builds up in overworked muscles and leads to cramping. But Dr. Lyle Lundblad, president of the Midwest Institute of Urology in Minneapolis, warns that it may not be good for all muscles. One side effect with creatine is erectile dysfunction in some men. Lundblad estimates about 10 percent to 20 percent of his patients have supplement-related erection or virility problems. Health professionals agree that adolescents under age 18 should not use creatine.
Kids are better off getting on a diet program.
They should drink mixes with protein powders, and nutrients and take base supplements like vitamins and minerals. A number of other groups are warning that use of creatine by teen-agers may be dangerous. Blue Cross and Blue Shield Association's Healthy Competition Foundation said anecdotal evidence from physicians, coaches, trainers and athletes indicate a link between creatine use and several adverse reactions, including cramping, diarrhea, nausea, dizziness, dehydration, muscle strain, high blood pressure, incontinence, and abnormal liver and kidney functions. According to Blue Cross and Blue Shield, a large number of high school seniors are using creatine monohydrate with little or no scientific evidence of its safety. One state high school federation in New Jersey is expected to recommend this year that its 440 members discourage athletes from using such diet supplements as androstenedione and creatine.