The most wellknown nutritionist in Sweden stated in a seminar, which was quoted on Swedish TV, that he would never ever run a marathon and thought that Ironman triathlons were ludicrous and that both events (and lifestyle) were harmful to a persons health and specifically the liver.

His argument was that the huge amounts of free radicals produced through exercise, and the equally huge amounts of antioxidants we strive to consume in order to restrict cellular damage (from the free radicals) would have a longterm effect on the liver.

He actually went as far as comparing the liver of longtime IM-individuals to alcoholics..

I´m in Arizona right now training and we have some medical expertise on hand and they don´t get his argumentation. Is the liver at all involved in the process of ridding the body of free radicals?
Isn´t this entire process of radicals and antioxidants taking place on a cellular level?

I just want to have some opinions so I can trash this guys arguments since by all means an IM-lifestyle is far healthier than the average Joe´s sedentary one..