The Bionutrient Food Association (BFA) has recently found that the same crops grown under different conditions offer wide variations in nutrient levels, which should be of major interest to consumers. In fact, antioxidant, polyphenol and mineral levels in carrots and spinach appear to vary significantly from sources such as farms, farmers markets and stores, researchers concluded in BFA’s first annual report on food supply nutrient variation, released earlier this year. “We discovered a range of variation in mineral nutrient levels between 400 to 1,800 per cent, depending on the mineral assayed,” says the association on its website ...