Cod liver oil, vitamin A toxicity, frequent respiratory infections, and the vitamin D deficiency epidemic

Cannell, J. J., Vieth, R., Willett, W., Zasloff, M., Hathcock, J. N., White, J. H., … Giovannucci, E. (2008). Cod liver oil, vitamin A toxicity, frequent respiratory infections, and the vitamin D deficiency epidemic. Annals of Otology, Rhinology and Laryngology. Annals Publishing Company. https://doi.org/10.1177/000348940811701112