Methyl folate or folic acid
Methyl folate - folic acid
Vitamin B9 is known as folic acid. It should be noted that folic acid does not occur in nature, in food products, nor in our body. Folic acid is a completely foreign substance. So-called folates occur in nature (in food products of vegetable - but also animal - origin), and/or - since the ingested food folates are transformed into methyl folates in animals (and in people, as well), food products of animal origin - besides folates - also contain methyl folate, as well. Methyl folate is the active formula, so the only thing that matters is how much methyl folate is contained in our body.
Folic acid is used in various dietary supplements, medications to enrich food products, in cereals, etc., because folate is unstable, so it can only be contained in fresh food.