Magnafolate® is the patent protected C crystalline L-5-Methyltetrahydrofolate Calcium salt (L-5-MTHF Ca) which is invented by Jinkang Pharma from China in 2012.
A scientist Dr.Mitchell from USA extracted around 1mg active folate from four tons of spinach successfully in 1943. However, the chemical property is too active to be stored. “How to make the active folate be stable?” has been a global difficulty since 1943.
The preparation of the Calcium salt and the crystal type C solved the stability problem completely.
Making it into Crystalline type is the key to open the door of stable active folate.

website : https://www.magnafolate.com/