Furthermore, vitamin B12 is needed for Calcium absorption. Deficiencies of vitamin B12 are usually caused by a lack of intrinsic factor, a substance that allows the body to absorb vitamin B12 from the digestive system. Such a deficiency can cause a range of symptoms such as fatigue, shortness of breath, diarrhea, nervousness, numbness or tingling sensation in the fingers and toes. People with the blood disorder pernicious anemia do not produce sufficient intrinsic factor and must take high doses of vitamin B12 to maintain their health. Vegetarians who follow a strict vegan or macrobiotic diet are also at risk of deficiency in Vitamin B12.
Vitamin B12, also called cobalamin, is one of eight water-soluble B vitamins. They are vitamins which are soluble in water ane are dispersed throughout the body dissolved in fluid. They are not stored in the body to any appreciable extent and must be replaced every day. Their influence on the body lasts for 14-18 hours after ingestion after which their potency decreases. Excessive intake of water-soluble vitamins is typically passed out through the urine. If your diet contains less than 50% RDA of water-soluble vitamins, deficiency symptoms may be displayed in as little as 4 weeks; much quicker than for fat-soluble vitamins.
All B vitamins, often referred to as B complex vitamins, assist and regulate carbohydrate, fat and protein metabolism. These are essential mechanisms which produce energy for the body. They also contribute to hemoglobin synthesis and red blood cell production which carries oxygen around the body. Furthermore, B complex vitamins help maintain muscle tone along the wall of the digestive tract and promote healthy skin, hair, eyes, mouth, liver and nervous system.
Vitamin B12 RDA
children 1-3 yrs 0.9 μg
children 4-8 yrs 1.2 μg
children 9-13 yrs 1.8 μg
Males 14-70+ yrs 2.4 μg
Females 14-70+ yrs 2.4 μg
Pregnancy 19-50 yrs 2.6 μg
Lactation 19-50 yrs 2.8 μg
For further information on nutrients RDA see our complete list for recommended dietary allowance.
Good sources are:beef, blue cheese, eggs, mackerel, sardines,
We have sorted our nutrition database by foods high in Vitamin B12. You can easily see how much Vitamin B12 is contained in different foods. You can also search through our database using the search box below or browse the Vitamin b12 content by food category.
Vitamin B12 content by food category:
|3D picture of Vitamin B12 (Cobalamin)|
Different forms or alternative names for Vitamin B12 (Cobalamin):
Importance of Vitamin B12 (Cobalamin):
key role in metabolism of carbohydrates, fat and protein
assists production of energy within the body
helps formation and regeneration of red blood cells, thus helping prevent anemia
maintains a healthy nervous system
promotes growth in children
needed for Calcium absorption
reduces heart disease risk
Deficiency of Vitamin B12 (Cobalamin) may cause:
growth failure in children
degeneration of spinal cord
lack of balance