Detox Your Kitchen: The problems with preservatives
Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are preservatives added to keep oils in foods, cosmetics and drugs fresh. Some animal studies have shown an association between these chemicals and cancer, and they have been linked to chronic skin conditions like hives.
Nitrates and nitrites, which appear on labels as sodium nitrate and potassium nitrate, are used in cured meats like hot dogs, bacon and sausage. These chemicals can bond with others called amines, forming yet another substance, nitrosamine, that is a carcinogen, at least in animal studies. Is the amount humans take in enough to make us sick? Hard to tell yet.
Sulfites, on labels as sulfur dioxide, sodium or potassium sulfite, bisulfite, or metabisulfite are used in wine, dried fruits, frozen potatoes, maraschino cherries and fresh shrimp. They can cause mild to life-threatening symptoms in a small percentage of asthmatic people, such as chest tightness, hives, stomach cramps and diarrhea.
Trans-fatty acids (trans fats): Most of the trans fats we consume have been chemically created. Hydrogen is added to vegetable oil atoms to give the substance a firmer texture for baking and provide a cheaper alternative than lard or butter that stays fresher far, far longer. Pies, cookies, chips, margarine - for a while, trans were hard to avoid.
The problem with trans fats is they have been found to significantly increase bad cholesterol levels (LDL) and decrease the beneficial ones (HDL) in human test subjects. Large studies over years show that they significantly increase risk of fatal heart disease. They are generally considered to be as bad for you as saturated fats, if not worse.
The FDA now mandates that food with more than 0.5 grams of trans fats must say so on the label. How much can you safely eat in a day? Hard to say; the United States Department of Agriculture says that fat should make up no more than about 35 percent of a day’s calories, and that trans fats should be limited. Experts on the dietary guidelines committee unanimously recommended that trans fats should be limited to 1 percent of total daily calories, though no official documents include this recommendation (What did they do, gag these folks and stuff 'em in the closet?).
Meanwhile, seeking our good side, manufacturers are finding new formulations for crappy snack foods, with oils such as canola, safflower, and olive, or genetically modified specialty oils. Just look for labels that boast no trans fats, or list no partially hydrogenated oils. (There may still be less than 0.5 grams in them, though.)
Short-term fixes: When assessing your risk, think about what and how much you eat. If your family has a few mass quantity items that commonly use worrisome additives, you may want to find organic substitutes. USDA-certified organic meat, milk and cheeses are produced without using hormones, growth antibiotics, pesticides or preservatives. Look for the round green USDA organic label.
If you suspect you or your child has a problem from an additive – hives, irritability, stomach upset - talk to your doctor about symptoms. She may have suggestions on pinpointing a cause using restricted diets or tests. Some food allergies can cause minor but irritating symptoms that persist for years until you undertake a fact-finding mission.
Longer term, when it comes to food, the simpler the better. Basing your family’s diet on simple staples and ingredients obviously reduces additives, though this way of eating increases cooking and shopping time and expense. It may be worth taking stock of how you eat, though, and not just to cut down on chemicals and trans fats. The fiber in minimally processed produce, whole grains and beans can lower your risk of heart disease, diabetes and colon disorders.











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