College of Massage Therapists of British Columbia (CMTBC) Practice Exam

Which vitamin is known to aid in the absorption of iron?

1. Vitamin A

2. Vitamin B

3. Vitamin C

4. Vitamin D

The correct answer is: Vitamin C

Vitamin C is well-known for its role in enhancing the absorption of iron, particularly non-heme iron, which is the type of iron found in plant-based foods. When vitamin C is consumed alongside iron-rich foods, it converts iron into a form that is more readily absorbed by the body. This interaction is significant, especially for individuals who have a higher risk of iron deficiency, such as vegetarians, vegans, and those with certain medical conditions. The mechanism involves vitamin C creating a more acidic environment in the intestines, which helps in the solubilization of iron, making it easier for the intestinal lining to absorb it. Additionally, vitamin C can help reduce iron to a ferrous state during digestion, which is more easily absorbed compared to the ferric state. Other vitamins, like A, B, and D, while essential for various bodily functions, do not play a significant role in iron absorption. Vitamin A is involved in vision and immune function, B vitamins are integral to energy production and brain health, and vitamin D is crucial for calcium absorption and bone health. None of these vitamins directly enhance the bioavailability of iron in the same way that vitamin C does.