Organic food will not make you healthier
According to researchers at Stanford University, eating organic food will not make you healthier, although it could cut your exposure to pesticides.
They looked at more than 200 studies of the content and associated health gains of organic and non-organic foods.
Overall, there was no discernible difference between the nutritional content, although the organic food was 30% less likely to contain pesticides.
Critics say the work is inconclusive and call for more studies.
The research, published in the journal Annals of Internal Medicine, looked at 17 studies comparing people who ate organic with those who did not and 223 studies that compared the levels of nutrients, bacteria, fungus or pesticides in various foods – including fruits, vegetables, grains, meats, milk and eggs.
None of the human studies ran for longer than two years, making conclusions about long-term outcomes impossible. And all of the available evidence was relatively weak and highly variable – which the authors say is unsurprising because of all the different variables, like weather and soil type, involved.
Fruit and vegetables contained similar amounts of vitamins, and milk the same amount of protein and fat – although a few studies suggested organic milk contained more omega-3.
Organic foods did contain more nitrogen, but the researchers say this is probably due to differences in fertilizer use and ripeness at harvest and is unlikely to provide any health benefit.
Dr. Crystal Smith-Spangler, the lead author of the latest review, said there were many reasons why people chose to eat organic, including animal welfare or environmental concerns.
“Some believe that organic food is always healthier and more nutritious. We were a little surprised that we didn’t find that.
“There isn’t much difference between organic and conventional foods, if you’re an adult and making a decision based solely on your health.”
• Organic food is produced to standards designed to keep the production more “natural”, using environmentally and animal-friendly farming methods
• Fewer, if any, chemicals are used and most pesticides are banned or very carefully controlled
• Food certified as organic is not allowed to contain genetically modified ingredients
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