Food for Thought
facts about our nutrition today

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Significant declines in nutrient density have been observed in many fruits and vegetables since the 1950s.
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These declines are largely attributed to changes in agricultural practices, including increased crop yields, soil nutrient depletion, and faster harvesting and storage methods.
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Vitamin C in spinach has decreased by approximately 50–70%, with calcium and iron also showing substantial declines.
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Tomatoes have seen a 25–50% drop in vitamin C content.
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Broccoli’s calcium and vitamin C levels have decreased by 20–50%.
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Apples show a 30–50% reduction in vitamin C and smaller declines in calcium.
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Carrots, potatoes, oranges, peas, and kale also show nutrient declines ranging from 15–50% in key vitamins and minerals.
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The study highlights the importance of soil health and sustainable farming to maintain nutrient density in produce.
Davis, D. R., Epp, M. D., & Riordan, H. D. (2004). Changes in USDA Food Composition Data for 43 Garden Crops, 1950 to 1999. Journal of the American College of Nutrition, 23(6), 669–682.https://doi.org/10.1080/07315724.2004.10719481