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I called them “toxic foods” because they are unhealthful and can cause harm to your future baby. They include swordfish, shark, king mackerel, and tilefish, soft cheeses and unpasteurized milk, hot dogs, luncheon meats, deli meats, raw or smoked seafood, raw or undercooked meat, unwashed vegetables, raw vegetable sprouts, unpasteurized juices, liver, saturated fats, trans fats, partially hydrogenated oils, added sugars including high-fructose corn syrup, refined flour, and herbal preparations.
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Michael C. Lu (Get Ready to Get Pregnant: Your Complete Prepregnancy Guide to Making a Smart and Healthy Baby)