Nutrients · µg
Vitamin B12
Vitamin B12 is essential for nerve function, red blood cells, and DNA. It occurs naturally only in animal products, so plant-only diets rarely hit it without fortified foods or a supplement.
How much you need
Values are for general adults and vary by age, sex, and life stage. S8D personalizes the exact target to your profile.
Where to get it
- Meat, fish & shellfish
- Dairy & eggs
- Fortified plant milks & cereals
- Fortified nutritional yeast
Common questions
How much Vitamin B12 do adults need?
Most adults need 2.4 µg for adults of Vitamin B12 (measured in µg). The exact target depends on age, sex, and life stage — S8D personalizes it to your profile.
What is the tolerable upper limit for Vitamin B12?
The tolerable upper limit is No established upper limit. Staying under it avoids the risks of excess intake; S8D never builds a day that exceeds any nutrient's upper limit.
Which foods are high in Vitamin B12?
Good sources include Meat, fish & shellfish, Dairy & eggs, Fortified plant milks & cereals, Fortified nutritional yeast.
Why does Vitamin B12 matter?
Vitamin B12 is essential for nerve function, red blood cells, and DNA. It occurs naturally only in animal products, so plant-only diets rarely hit it without fortified foods or a supplement.