300 Quick Dissolve Fast Acting Vitamin B-12 2500 mcg, Natural Cherry Flavor tablets Sublingual B-12 is placed under the tongue, where it quickly dissolves B-12 is excellent for energy metabolism ...

Beef liver is one of the most concentrated sources of vitamin B12. A 4-ounce raw serving contains 67 micrograms (mcg) of B12, nearly 3,000% of the recommended dietary allowance (RDA) for adults.

The amount of vitamin B12 in an egg depends on its size and a large egg contains about 0.6 mcg of vitamin B12 in it. The recommended daily intake for most adults is 2.4 mcg, meaning one large egg ...