Because there are so few human studies, we do not have a clear picture of long-term safety
Animal studies show that the metabolites can be toxic to neurons at levels that are much lower than those required for liver damage.[ref][ref] I cant help but think that the times when you give an infant acetaminophen circumcision, shots, and illnesses are also the times when the antioxidant system is already taxed, bringing about two hits to their young detox system
CMV-Hb was measured at 0.01-0.7% (CMV-Hb/Hb x 100) and while the assay sensitivity was such that Hb was robustly measured in single erythrocytes, at least 5 erythrocytes were needed to measure CMV-Hb
That being said, most people don't train nearly hard enough
Butler, Sonia & Crowfoot, Gary & Quain, Debbie & Davey, Andrew & Magin, Parker & Maguire, Jane