JoinLiv YYH-Folate contains Quatrefolic®, the glucosamine  salt of (6S)-5-methyltetrahydrofolic acid, a source of the  naturally-occurring form of folate, which may have  better bioavailability and stability than regular folic  acid.* Additionally, JoinLiv YYH-Folate contains Yin  yang huo, a traditional herb from China.