Recent medical opinion suggests that if your body is not absorbing enough iron from your food or supplements, taking Vitamin C may assist but it's not a good idea to take them together as a vitamin supplement.
"Vitamin C is exceptionally effective at increasing iron absorption in the body, which can lead to iron toxicity if the vitamin supplement is taken in high doses," Dr. Huffman, founder of Ambari Nutrition, tells us. "If you have to take both vitamin supplements, then make sure to take one of the supplements at least two hours after taking the other to avoid toxicity."