Complex sentence: The ideas he promotes have been criticized mostly by medical and scientific professionals, with opinions of him ranging from dismissive to damning; and his claims for the effectiveness of alternative medicine can, some have argued, lure sick people away from medical treatments.
Split into simpler sentences: The ideas he promotes have been criticized mostly by medical and scientific professionals, with opinions of him ranging from dismissive to damning. His claims for the effectiveness of alternative medicine can, some have argued, lure sick people away from medical treatments.