Vitamin B12: energy, nerves and a meat-free diet
2026-06-27 · 4 min read
Vitamin B12 is needed for energy, the nervous system and blood formation. Its quirk is that it is found almost only in animal products — so vegans and vegetarians almost always need to supplement it.
Why you need it
B12 takes part in energy production, supporting nerves and forming red blood cells. Deficiency brings fatigue, weakness, brain “fog” and tingling in the hands and feet.
Who especially needs it
Above all vegans and vegetarians, and also older people in whom B12 absorbs less well. For them, regular intake is not “optional” but necessary.
Which form to choose
Methylcobalamin is the active, well-absorbed form. B12 is water-soluble, so it is hard to overdose, and sublingual tablets and drops are convenient for absorption.
FAQ
How do I know if I’m low on B12?
For certain, with a blood test. Indirect signs (fatigue, numbness, paleness) occur in other conditions too, so it is best to check.
Can I get B12 from plants?
There are virtually no reliable plant sources. Vegans need to get B12 from fortified foods or supplements.
Related sections
This article is for information only and is not a substitute for professional advice. Supplements are not medicines.