? BEST B12 COMPLEX: By combining all three (!) forms of vitamin B12 – adenosylcobalamin, hydroxocobalamin, and methylcobalamin – along with the co-factors folic acid (vitamin B9) and vitamin B6, our Complex 1a can be readily absorbed by the body. For fatigue and exhaustion. ? GUARANTEED VEGAN B12: At Yes Vegan Naturals, we focus on vegan vitamin B12 and combine our B12 capsules with natural sources like chlorella and the three active forms of B12. ? HIGH-DOSE B12 (ONLY 1 CAPSULE DAILY): Our vitamin B12, B6, and folic acid capsules are very high-dose at 500 μg and last for 180 days. In technical terms, this is referred to as a high-dose vitamin B12 complex. ? DEVELOPED BY EXPERTS: Vitamin B12 is especially important for vegans, which is why our vegan nutritionists have developed a high-dose vitamin B12 supplement that leaves nothing to be desired. ? 30-DAY MONEY-BACK GUARANTEE: We want you to be completely satisfied. Should you experience any problems with our histamine intolerance capsules, you will receive a full refund within 30 days, no questions asked. Were only satisfied when you are!