High-Dose NAC Linked to Offspring Skull, Face Changes
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- Texas A&M College of Veterinary Medicine and Biomedical Sciences researchers found that male mice given high doses of NAC and selenium for six weeks produced offspring with noticeable changes in skull and facial structure, while the fathers themselves showed no outward health issues.
- The study, published in Frontiers in Cell and Developmental Biology, was led by Dr. Michael Golding and built on his lab's prior work linking paternal alcohol consumption to developmental issues in offspring, including craniofacial abnormalities.
- Female offspring showed more pronounced physical differences, including closer-set eyes and smaller skulls — traits also associated with fetal alcohol syndrome.
- Golding warned that midline facial abnormalities likely reflect midline brain abnormalities, noting that 'the face mirrors the brain' and linking such changes to potential impulse control problems, epilepsy, and other developmental issues.
- NAC is a common component in multivitamins and is sometimes included at elevated levels; Golding cautioned that supplements providing 1,000% of the recommended daily amount are risky, while staying within the 100% range is generally safe.
- Researchers noted it remains unclear whether the offspring in the study will experience central nervous system issues, with more research needed to determine any long-term neurological effects.
Why it matters: High-dose antioxidant supplements like NAC — commonly found in multivitamins — carry potential intergenerational risks for men planning families, according to Golding's team. The finding that paternal supplement use altered offspring craniofacial development in mice challenges the 'more is better' supplement culture, particularly since NAC is routinely included at elevated levels in over-the-counter products.
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