Wow, a new study in the Journal of HortScience claims nutrient composition of fruits and vegetables in the United States has been dropping over the last 50 to 100 years, in some cases median declines of 5% to 40% for minerals, with similar results in protein and vitamins. The studied crops, broccoli and wheat, may be victim of the newly recognized genetic dilution effect, referring to the use of genetic methods to increase crop yield, but consequently dilute nutrient concentrations in crops; from U.S. Food Policy.
More reason to buy organic! Organic fruits and veggies usually have more nutrients than conventional produce. According to Dr. Fuhrman, the theory is when plants are forced to deal with the stress, like insects, they produce more compounds beneficial to humans, like flavonoids. Plus organic tastes better and is better for the environment.
In related news, crops grown in dirt fertilized with livestock manure may actually absorb the antibiotics injected into cattle, helping spawn antibiotic-resistant bacteria. Eek!
Image credit: Elizabeth Thomsen