Lamberts Methyl B Complex is a superior and complete B Vitamin supplement. Instead of folic acid, it contains a type of folate called methylfolate (or 5-MTHF), which is similar to the natural form found in foods, such as green leafy vegetables, and is already active and ready for the body to use. Quatrefolic®, the form of folic acid that provides optimal stability and bioavailability, has been specifically selected to ensure optimal methylation. Several of the B vitamins are known to contribute to the normal function of the immune system and normal psychological function. Others are recognised as contributing to the reduction of tiredness and fatigue, as well as the maintenance of normal skin.