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Tiredness and Lack of energy Q&As

What’s the best way to take vitamin B12?

How does the body absorb vitamin B12? Which supplement should you choose? Is there an ideal time of day to take it? Supersmart provides the answers.
Foods rich in vitamin B12
Tray of foods rich in vitamin B12
Rédaction Supersmart.
2020-02-24Commentaires (0)

For maximum absorption, vitamin B12 should be taken in spaced out doses during the day as the body can only absorb small amounts of B12 at a time. It’s also best to avoid taking it too close to a vitamin B12-rich meal: one, for example, containing offal or red meat in general, shellfish, oily fish (tuna, herring mackerel, trout) or eggs...

With regard to dietary supplements, the three forms of vitamin B12 (cyanocobalamin, methylcobalamin et hydroxycobalamin) are all absorbed by the body in a similar way.

Why does vitamin B12 need to be taken in several doses?

The body absorbs vitamin B12 via two mechanisms (1):

That’s why it’s advisable to take supplements in several doses, and to avoid taking them at the same time as a vitamin B12-rich meal.

The role of vitamin B12 and potential consequences of deficiency

A deficit in vitamin B12 can pose serious health risks (2), such as:

Certain individuals need to be particularly careful when it comes to vitamin B12 intake:

Several studies have demonstrated the efficacy of vitamin B12 supplementation (up to 2mg a day) in preventing deficiency. We recommend Methylcobalamine 1 mg, a supplement that comes in the form of sugar-free, sub-lingual tablets, and helps to optimise function of the nervous system and reduce fatigue.

References

  1. O'Leary F, Samman S : Vitamin B12 in health and disease. Nutrients. 2010, Vol. 2(3), pp 299-316.
  2. Pierre Rufenacht, Anne Iten, Sara Mach-Pascual : Hypovitaminose B12 : challenge diagnostique et thérapeutique. Rev Med Suisse. 2008, Vol. 4, pp 2212-2217. 
  3. Kuzminski, A. M., Del Giacco, E. J., Allen, R. H., Stabler, S. P., and Lindenbaum, J. Effective treatment of cobalamin deficiency with oral cobalamin. Blood 8-15-1998;92(4):1191-1198.
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