Although rare, animal studies have shown that folate at very high doses may lead to behavioral changes and seizures.

Some people may develop symptoms of allergic reactions, including rashes, itching, and swelling. Although it is known that rare and life-threatening systemic reactions may occur, they are called allergic reactions.
So we recommend:
Magnafolate® L-Methylfolate—maximizes the supplementation delivering a "finished" folate the body can immediately use without any kind of metabolization.
Jinkang Pharma ,the Manufacturer & Supplier of L-Methylfolate.