Below are articles and videos that focus specifically on rice: brown rice (a whole grain) vs white rice (a refined grain).
Articles by Dr Greger:
Videos by Dr Greger:
(4 mins) Transcript. Dr Greger's summary: "What happens when brown rice is put to the test in a randomized controlled crossover trial?"
(1 min) Transcript. Dr Greger's summary: "Which has more antioxidants: black rice, brown rice, or red rice?"
(5 mins) Transcript. Dr Greger's summary: "Protein consumption can exacerbate the insulin spike from high glycemic foods."
Refined grains like white rice have only the endosperm. Whole grains have all three parts: bran, germ and endosperm. The diagram below shows that we lost the vast majority of micronutrients like vitamins and minerals by removing bran and germ. We also lose a lot of fiber.
How many micronutrients are lost in brown rice with bran and germ removal? Whole Grains Council has a diagram:
Rice is not recommended by multiple Whole Food Plant-Based doctors like Dr Greger, Dr Klaper and Dr fuhrman. Why? Because rice has too much arsenic these days! Even if we adopt the best known arsenic reduction technique (boiling in excess water, then draining), cancer risk from arsenic in rice remains too high.