Took iron pill with grape juice not grapefruit, welch's grape juice. idk if that's bad or not. i drank water and ate afterwards.

Ok: It may actually be helpful to take iron with juices rich in vitamin C because iron is more easily absorbed when taken with vitamin C. Ascorbic acid is the strongest iron inhancer, reducing ferric iron to ferrous iron. Avoid iron inhibitors like tannins in tea, red wine and phytates in nuts, seeds, grains and cereal. They prevent non heme iron from being absorbed