Scientists recently reported that obesity itself or having an obese mother adversely affects sperm quality in mice and that nicotinamide mononucleotide (NMN) supplementation can negatively impact sperm quality, depending on dose.

Scientists from UNSW Sydney and the University of Queensland in Australia, along with David A. Sinclair from Harvard, demonstrate elevation of nicotinamide adenine dinucleotide (NAD+) levels may provide an effective and non-invasive strategy to restore and maintain female fertility during aging. The scientists use the NAD+ precursor, NMN.