There is no known toxicity of riboflavin.
et al. Disorders of riboflavin metabolism. J Inherit Metab Dis. 2019;42:608.
et al. Riboflavin deficiency-implications for general human health and inborn errors of metabolism. Int J Mol Sci. 2020;21:3847.
et al. Riboflavin in human health: a review of current evidences. Adv Food Nutr Res. 2018;83:57.