W7-L2: Vitamin B12

Question 1

What are the Functions of Vitamin B12?

Answer 1

1. Red Blood Cells
2. Neurological Functioning
3. DNA synthesis
4. Water Soluble

Question 2

What is the major function of Vitamin B12?

Answer 2

Essential for the production of healthy red blood cells, and helps prevent megaloblastic anaemia (large, immature red blood cells).

Question 3

How does Vitamin B12 aid in
Neurological Functioning?

Answer 3

1. Supports myelin sheath formation (the protective coating around nerves), which is crucial for nerve transmission and brain health
2. Helps maintain cognitive function and mental health (deficiency can lead to neurological symptoms like memory loss, confusion, and even depression

Question 4

How does Vitamin B12 play a role in
DNA synthesis?

Answer 4

Involved in DNA synthesis and cell division, essential for growth and repair of tissues

Question 5

What is the unique function of Vitamin B12?

Answer 5

The only water-soluble vitamin stored in the body, primarily in the liver.

The body can store enough B12 for several years, so deficiencies may take years to develop

Question 6

What are good sources of Vitamin B12?

Answer 6

Question 7

What is the RDA for Vitamin B12?

Answer 7

RDA is 2.4 mcg/day M & F

Question 8

Are there problems with taking high doses of Vitamin B12?

Answer 8

High doses are generally safe because the body excretes excess B12, but doses should be individualized based on need and absorption capabilities

Question 9

When might an individual need to take
Vitamin B12 supplementations?

Answer 9

Supplement dosages vary widely, but 500 mcg/day is common for those with deficiency or absorption issues

Question 10

What group is likely to be defecient in B12?

Answer 10

Vegans more likely to have B12 deficiency

Question 11

How is Vitamin B12 absorbed?

Answer 11

Vitamin B12 absorption is a complex process involving intrinsic factor (a protein produced in the stomach), which binds to B12 and allows its absorption in the ileum (part of the small intestine).

Question 12

How can we mask anemia caused by
Vitamin B12 deficiency?

Answer 12

High folate intake can mask anemia caused by B12 deficiency

Question 13

When should Vitamin B12 be
especially examined?

Answer 13

• Should be examined in depression

Question 14

What might Hinder Vitamin B12 Absorption?

Answer 14

Malabsorption issues (e.g., from conditions like Crohn’s disease or atrophic gastritis) can hinder B12 absorption and lead to deficiency