Everything about Vitamin B12
All articles on Vitamin B12 — from dosage to timing, explained clearly.
Vitamin B12 on a vegan diet: why a supplement belongs
Vegan is the one diet for which the DGE considers a B12 supplement mandatory. Why algae, sauerkraut and organic oat drink do not close the gap.
Vitamin B12 and folic acid: why the gap gets hidden
Both show the same blood count, but often only one is missing: why folic acid can mask a B12 deficiency — and where the 1,000 µg upper limit comes from.
Spotting a vitamin B12 deficiency: serum, holo-TC, MMA
A normal B12 value in the blood does not rule out a deficiency. What serum B12, holo-TC and methylmalonic acid each show — and in which order they change.
Vitamin B12 foods: what one portion delivers
Four everyday portions cover the reference value of 4 µg. What milk, egg, cheese and fish actually contribute — and why algae do not count.
Buying vitamin B12: price per month, not per µg
1,000 µg on the tin says little about what arrives. What makes a B12 pack comparable: days per tin, the form in the ingredients, mandatory label details.
Vitamin B12 forms: cyano-, methyl-, hydroxocobalamin
Four B12 forms are approved for food supplements. What sets them apart chemically, what the body makes of them — and what the label says.
Taking vitamin B12: timing, stomach acid, metformin
Morning or evening, on an empty stomach or with food, a gap to metformin? What actually decides how much B12 arrives — and what only sounds like a rule.
Vitamin B12 absorption: intrinsic factor and the 1 % rule
The active uptake route for vitamin B12 is full at around 1.5 µg per meal. What happens beyond that, why tablets hold 1,000 µg and who absorbs less.