Many use the terms ‘folic acid’ and ‘folate’ interchangeably, which can be confusing. This is because even though both are a form of vitamin B9, they are a little different.
Firstly, folate is natural and folic acid is synthetic. By that we mean that you can get folate by consuming whole foods like beans, peanuts, dark green leafy vegetables, etc. Folic acid, on the other hand, is mostly found in fortified foods (folic acid-enriched food) and dietary supplements [2].
Secondly, they also have distinct chemical structures, which causes them to react differently in the body. For example, natural folate quickly loses activity during food processing and preparation. Meanwhile, folic acid remains stable for months or years, which is why you can find it even in cereal and supplements [3].
Lastly, due to its chemical structure, your body can only use 25% to 50% of the folate you consume. On the other hand, 100% of folic acid consumed will be used by your body [3].