New research claims that over 90% of pregnant individuals may lack key nutrients in their diets, while another study finds many prenatal vitamins on the market lack essential nutrients like choline and iodine. Some of the supplements exceed safety limits for toxic metals, raising accuracy and safety concerns. Despite the general estimate of 10% of pregnant people struggling to meet nutritional needs, research from the Stevens Institute of Technology, US, claims a majority of them are failing to get enough iron, vitamin D or vitamin E from their diets.