Vitamin B12 Adequate Intake

Since b12 is a water soluble vitamin there is no danger of overdose when a high dose is administered.
Vitamin b12 adequate intake. The recommended daily intake rdi for vitamin b12 for people over 14 is 2 4 mcg however you may want to take more or less depending on your age lifestyle and specific situation. Sources of vitamin b12 food. Vitamin b12 is generally not present in plant foods but fortified breakfast cereals are a readily available source of vitamin b12 with high bioavailability for vegetarians 5 13 15.
Only a small. This applies to almost anyone over the age of 14. Vitamin b12 is involved in the breakdown of a protein called homocysteine.
A lack of adequate vitamin b12 can increase homocysteine levels. High dose vitamin b12 of around 1000 µg per day is needed if there is an increased requirement due to a number of factors that we will discuss below or if b12 deficiency is suspected. However your lifestyle age or special circumstances can mean that you should be taking more or less than the rdi.
Vitamin b12 is a normal component of human milk 1 the recommended daily intake in lactating women is 2 8 mcg and for infants aged 6 months or less is 0 4 mcg 2 lactating mothers may need to supplement their diet to achieve the recommended daily intake or to correct a known deficiency. High homocysteine levels are associated with an increased risk of heart disease and stroke as it may promote the formation of blood clots and excess free radical cells and may impair normal blood vessel function. The rdi recommended daily intake for vitamin b12 is 2 4 mcg.