Foods that contain small amounts of folate but are not considered good sources can contribute significant amounts of folate to an individual diet if these foods are eaten often or in large amounts.

• 有的食物还有很少量的叶酸，被认为是叶酸的较差来源，但是如果个体食用的次数很频繁或者量很大的话，它们提供的叶酸的量也是很可观的。