IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Yes there is good evidence that acetaminophen (the active ingredient in Tylenol) can deplete glutathione under certain conditions. But whether that matters depends on dose, duration, and individual factors. Frontiers Sheep recombinant IGF 1 promotes organ specific growth in fetal sheep