(5 mins) Transcript. Dr Greger's summary: "Laboratory models suggest that extreme doses of heme iron may be detrimental, but what about the effects of nutritional doses in humans? A look at heme’s carcinogenic effects."

(6 mins) Transcript. Dr Greger's summary: "What do clinical studies show about the role of heme in the formation of a class of carcinogenic compounds?"

(7 mins) Transcript. Dr Greger's summary: "Rectal biopsies taken before and after eating meat determine the potentially DNA-damaging dose of heme."

(4 mins) Transcript. Dr Greger's summary: "Heme iron, the type found predominantly in blood and muscle, is absorbed better than the non-heme iron that predominates in plants, but may increase the risk of cancer, stroke, heart disease, and metabolic syndrome."

(3 mins) Transcript. Dr Greger's summary: ""

(1 min) Transcript. Dr Greger's summary: "An argument that non-anemic women should choose plant-based sources of iron, and not supplement during pregnancy."

(3 mins) Transcript. Dr Greger's summary: "An extraordinary thing happened when those at high risk for heart disease were randomized to give blood—and it had nothing to do with their heart."

(4 mins) Transcript. Dr Greger's summary: "Prioritizing plant-based sources of iron may be more effective than giving blood at reducing the risk of potentially “ferrotoxic” (iron-related) diseases such as cancer and diabetes."