Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too much Vitamin A

The limit for Vitamin A is supposed to be 5,000 IU and this pre-natal supplement is 13,000 IU. A study in the NEJM in 1995, found that among women who take more than 10,000 IU of supplemental vitamin A, an estimate of 1 in 57 involves a baby with a birth defect attributable to high vitamin A intake. I don't understand why Solaray has such a high dose in these vitamins.