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B is for Bioavailability

Put simply bioavailability refers to the amount of a nutrient that is absorbed from the diet. I often find that people aren't aware that nutrient absorption varies depending on its source. Macronutrients - carbs, proteins and fats - have high bioavailability at more than 90% absorption but with micronutrients things get a bit more complicated. Iron and calcium are better absorbed from animal sources meaning vegetarians and vegans need to pay close attention to these micronutrients. There are some tricks that can help increase absorption. Having vitamin C with plant sources of iron helps to increase absorption and having an adequate vitamin D level helps us to absorb calcium, clever huh?

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