Label data · how much b12 per day supplement
Vitamin B12: mcg per serving on every B12 label we carry
B12 labels print 500 mcg to 5,000 mcg per tablet — hundreds of times the daily value — because absorption from a tablet is a small fraction and the vitamin is water-soluble. The table lists the printed B12 per serving and form for every B12 product we track.
1 labels we read
- Lowest
- 1,000 mcg
- Median
- 1,000 mcg
- Highest
- 1,000 mcg
Vitamin B12 per serving as printed on the Supplement Facts panel of each product below.
What to check on the label
- mcg per tablet and pieces per serving
- Cyanocobalamin (standard, stable) vs methylcobalamin (marketed as 'active')
- Sublingual vs swallowed
Vitamin B12 on each label we carry
Sorted by the printed amount. Tap a row to see it on eBay; the product page has the full label.
We may earn a commission when you buy through our links, at no extra cost to you. Affiliate disclosure

Nature's Bounty Vitamin B12 1000 mcg Coated Tablets
Vitamin B12: 1,000 mcg per serving
Go deeper
Questions people ask
Is 1,000 mcg of B12 too much?
It's a common label dose; B12 is water-soluble and has no NIH upper limit. Whether you need a supplement at all is a blood-test question for your doctor.
Methylcobalamin or cyanocobalamin?
Cyanocobalamin is the standard, stable form used in most studies; methylcobalamin is marketed as the active form. The mcg number on the label is the comparable part.
Part of the open label dataset (CC BY 4.0) · how we read labels · other ingredients: Creatine monohydrate · Whey protein · Plant protein · Collagen peptides · Magnesium · Melatonin · Ashwagandha · Vitamin D3