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12 Key Additives to Avoid and Their Health Risks:
1.Hydrogenated Fats—cardiovascular disease, obesity
2.Artificial Food Colors—allergies, asthma, hyperactivity; possible carcinogen
3.Nitrites and Nitrates—these substances can develop into nitrosamines in body, which can be carcinogenic
4.Sulfites (sulfur dioxide, metabisulfites, and others)—allergic and asthmatic reactions
5.Sugar and Sweeteners—obesity, dental cavities, diabetes and hypoglycemia, increased triglycerides (blood fats) or candida (yeast)
6.Artificial Sweeteners (Aspartame, Acesulfame K and Saccharin)—behavioral problems, hyperactivity, allergies, and possibly
carcinogenic. The government cautions against the use of any artificial sweetener by children and pregnant women. Anyone with PKU (phenylketonuria—a problem of phenylalanine, an amino acid, metabolism) should not use aspartame (Nutrasweet).
7.MSG (monosodium glutamate)—common allergic and behavioral reactions, including headaches, dizziness, chest pains, depression and mood swings; also a possible neurotoxin
8.Preservatives (BHA, BHT, EDTA, etc.)—allergic reactions, hyperactivity, possibly cancer-causing; BHT may be toxic to the nervous system and the liver
9.Artificial Flavors—allergic or behavioral reactions
10.Refined Flour—low-nutrient calories, carbohydrate imbalances, altered insulin production
11.Salt (excessive)—fluid retention and blood pressure increases
12.Olestra (an artificial fat)—diarrhea and digestive disturbances
Source :http://www.healthychild.com/food-additives-and-human-health