User:PresleyS123/Vegan nutrition

Lead
According to a 2015 systematic review, there was little evidence available about vegetarian and vegan diets during pregnancy, and a lack of randomized studies meant that the effects of diet could not be distinguished from confounding factors. It concluded: "Within these limits, vegan-vegetarian diets may be considered safe in pregnancy, provided that attention is paid to vitamin and trace element requirements." A daily source of vitamin B12 is important for pregnant and lactating vegans, as is vitamin D if there are concerns about low sun exposure. A different review found that pregnant vegetarians consumed less zinc than pregnant non-vegetarians, with both groups' intake below recommended levels; however, the review found no significant difference between groups in actual zinc levels in bodily tissues, nor any effect on gestation period or birth weight.This was concluded to be because the vegetarian and vegan diets focused more on plant-based foods and the normal diets were usually meals built around protein. Overall they ended with the result that there was no reason for women to be avoiding vegan and vegetarian diets whilst pregnant as long as they take their prenatal supplements as intended