AdvertisementAnd according to NHS surgeon, author, and podcast host Dr Karan Rajan, “If you consume too much calcium, either in supplement form or in food, this can actually impact iron absorption” too. In fact, the Mayo Clinic advises against taking calcium supplements alongside iron-rich meals, too. 4) Green tea or green tea extract and ironGreen tea or green tea extract can also impact iron absorption. Dr Rajan said not to drink either if you need to take iron supplements. 5) Vitamin C and vitamin B12Vitamin C and vitamin B12 don’t mix well when taken together, the surgeon continued, as “vitamin C in high doses can reduce the amount of vitamin B12 that’s absorbed... take vitamin C at least two hours after vitamin B12”.

Source: Huffington Post November 28, 2025 15:46 UTC