Anti-aging supplements taken by millions may undermine cancer treatment, study warns

Over-the-counter anti-aging supplements taken by millions of Americans to boost energy and lessen the side effects of chemotherapy may actually impair cancer treatments, a new study suggests.

Researchers at the Case Western Reserve University School of Medicine found that popular vitamin B3 derivatives – including nicotinamide mononucleotide (NMN), nicotinamide riboside (NR) and nicotinamide (NAM) – could help cancer cells survive chemotherapy.

Those compounds are used by the body to produce NAD+...