Which one of the following supplemental vitamins is most likely to cause toxicity?

Name: Which one of the following supplemental vitamins is most likely to cause toxicity?
Brand: Quizplus
Rating: 4.9 (44 reviews)

Question

Quizplus · Accepted Answer

Niacin, especially in high doses taken as a supplement, can cause flushing, itchiness, and other symptoms of toxicity. This can occur with doses as low as 50-100 mg per day, although the threshold may be higher for some individuals. Biotin, riboflavin, and thiamin are less likely to cause toxicity at typical supplemental doses.

Which One of the Following Supplemental Vitamins Is Most Likely