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It's an antioxidant in food, an abrasive agent in toothpaste (dicalcium phosphate dihydrate) as well as being a firming agent. Firming agents are added to seperate residual pectin (occurs in ripe fruits and vegetables and is used in making fruit jellies and jams), thus strengthening the supporting tissue and preventing its collapse during processing.

Ascorbic acid helps maintain the red color of cured meat and prevents the formation of nitrosamines, which promote cancer (see SODIUM NITRITE). It helps prevent loss of color and flavor by reacting with unwanted oxygen. It is used as a nutrient additive in drinks and breakfast cereals. Sodium ascorbate is a more soluble form of ascorbic acid. ERYTHORBIC ACID is very similar to ascorbic acid, but has no value as a vitamin. Large amounts of ascorbic acid may reduce the severity of colds and offer other health benefits.

Gelatin

Gelatin is derived from collagen, which is mainly involved with connective tissues and bones. It is known for its capability to gel and form semi-solids with its solution. The type of gelatin depends on the source of where it came from. Many of these sources include cattle bones, cattle hides, pork skins, and dried crushed bone. Cattle hides are the least used source for gelatin, while crushed bone is used mostly for photographic or pharmaceutical applications. Pork skin is the most commonly used raw source for edible gelatin in North America. The gelatin produced, Type A gelatin is extracted from the pork skin through a complex process involving acid treatment, washing, sterilization, and more. Because of the use of animal as a raw material source, gelatin should be restricted from diets concerning animal by-products.

"How We Make Gelatin." Gelatin Information, News, History and More. Gelatin Manufacturers Institute of America, 2001. Web. 17 May 2011.

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or iron, iron sulfate, Used in the food industry as a carrier for iron.



Iron in the body works with proteins that release energy in metabolism such as hemoglobin, which carries oxygen in the blood stream. Also involved in the making of ammino acids, hormones, and neurotransmitters.

Iron can be found in meats, poultry, and fish and many fortified foods. Fruits, vegetables and juices also provide some iron.

Iron deficiency symptoms include; anemia, inability to concentrate, weakness, fatigue, pallor, being out of breath after small exertion, cold hands and feet. Some people may develop a smooth round tongue, and have difficulty swallowing.



Symptoms of overload include: nausea, vomiting, diarrhea, rapid heartbeat, dizziness, shock and even death.



***Parents should be warned that iron supplements and multivitamins containing iron are the second most common cause of poisoning in young children in the U.S. (Aspirin is the first) The lethal dose of ferrous sulfate for a 2-year-old is only 3g.***



Source: Harvard Medical School - Health Publications Group, Vitamins and Minerals

Flavor(s) Natural & Artificial

A combination of both what is considered “natural” and “artificial” flavoring under the Federal Drug Administration(FDA) Regulations. Artificial flavoring “means any substance, the function of which is to impart flavor, which is not derived from a spice, fruit or fruit juice, vegetable or vegetable juice, edible yeast, herb, bark, bud, root, leaf or similar plant material, meat, fish, poultry, eggs, dairy products, or fermentation products thereof.” In other words, substances not found in nature to add flavor to a substance is considered artificial. See Artificial Flavor. Natural flavoring “means the essential oil, oleoresin, essence or extractive, protein hydrolysate, distillate, or any product of roasting, heating or enzymolysis, which contains the flavoring constituents derived from a spice, fruit or fruit juice, vegetable or vegetable juice, edible yeast, herb, bark, bud, root, leaf or similar plant material, meat, seafood, poultry, eggs, dairy products, or fermentation products thereof, whose significant function in food is flavoring rather than nutritional.” See Natural Flavor.

Code of Federal Regulations Title 21 of the Us. Food and Drug Administration. Title 21. Volume 2. Revised 1 April 2010.

Starch, the major component of flour, potatoes, and corn, is used in many foods as a thickening agent. However, starch does not dissolve in cold water. Chemists have solved this problem by reacting starch with various chemicals to create MODIFIED STARCHES

Stearic Acid from vegetable fats is used helps bind and thicken lotions and creams, is also useful in making harder soap and candles. Usage at 5% is enough for most applications

Vitamin E

Synonyms: vitamin E acetate, tocopherol acetate, 2H-1-benzopyran-6-ol, various other trade names



Works primarily as a antioxident to protect cells throughout the body.



Vitamin E can be extracted from natural oils (e.g. soybean, cottenseed, corn),leafy green vegetables and some nuts. Also can be synthesized. Humans and mammals are unable to synthesize Vitamin E.

Clinical symptoms of Vitamin E deficiency include neuropathy, fetal death, and myopathy (muscle disease).

Major uses include animal feeds (approx 75% of use), as a food supplement, as an antioxidant, and in pharmaceutical formulations



Source: Foodfacts

The term “vitamin E” refers to a family of eight related, lipid-soluble, antioxidant compounds widely distributed in plants. The tocopherol and tocotrienol subfamilies are each composed of alpha, beta, gamma, and delta vitamers having unique biological effects. Different ratios of these compounds are found in anatomically different parts of a plant. For example, the green parts of a plant contain mostly alpha-tocopherol and the seed germ and bran contain mostly tocotrienols. Along with other nutrients tocopherols and tocotrienols are concentrated in the bran layers of the rye grain, and are only present at low levels in the flour endosperm. Tocopherols are also present in algae, mint teas, and other food stuff.87-93



When this family of compounds was first discovered and determined to be essential for health, a standardized test for its activity was devised for which the members of the family were rated for their biological activity. In one test, alpha tocopherol scored highest and was rated 100% with all others having lower ratings. In accordance with this rating, alpha-tocopherol was deemed to be the essential compound and was called vitamin E. One International Unit (IU) of vitamin E activity is the activity under this rating of one mg of the plant-derived form of alpha-tocopherol.94



Since the original rating method was established, many additional important biological effects of these compounds have been discovered and many nutritional scientists now consider that rating method to be incomplete. For example, by the original rating, gamma-tocopherol was only 10% to 30% as strong as alpha-tocopherol, yet more recent studies have shown it to be essential for maintaining the health of cell membranes, especially if alpha-tocopherol is being supplemented. New studies continue to elucidate the unique benefits of individual members of the vitamin E family. For these and other reasons, the original definition of vitamin E has been enhanced to include all eight family members and the related compounds that convert to them in the body.94



Vitamin E compounds are usually produced and made available in esterified form as alpha-tocopheryl acetate or alpha-tocopheryl succinate. Neither of these forms has any antioxidant activity until converted to alpha-tocopherol in the body, but they are much more stable with respect to storage time and temperature than the unesterified forms. Moreover, while the acetate form is rapidly activated within the body, activation of the succinate form is slower. The succinate form appears to access and benefit areas of the tissues that are unavailable to the other forms. For this reason, there is a tendency to regard alpha-tocopherol succinate as a distinctly different and beneficial compound. Alpha-tocopherol succinate appears to have longer half-life in the body, and does not interfere with vitamin A or K absorption.95-98



Serious vitamin takers prefer cold-water dispersible dry powder vitamin E supplements in the form of alpha-tocopheryl succinate or acetate because the cold-water dispersible forms are efficiently absorbed even when taken on an empty stomach or with a low-fat meal. The non-cold water dispersible (oil) forms of vitamin E may be poorly absorbed unless taken with several grams of fats or oils.



Cold-water dispersible vitamin E is more efficiently absorbed than some other forms. Both “acetate” and “succinate” vitamin E can come from natural sources. The importance to the consumer is how well the vitamin E absorbs into the bloodstream. Cold-water dispersible vitamin E, whether in a succinate or acetate form, always comes in a white dry powder, while non-cold water dispersible natural and synthetic acetate forms of vitamin E are always in a thick brown oil.



Source: http://www.lef.org/newshop/items/item00063.html

(Thickening Agent) Carrageenan is obtained from seaweed. Large amounts of carrageenan have harmed test animals colons; the small amounts in food are generally recognized as safe.



A 2007 joint FAO (Food and Agriculture Organization)/WHO (World Health Organization) committee stated that “based on information available, it is inadvisable to use carrageenan or processed eucheuma seaweed in infant formulas.” While Carrageenan is “generally recognized as safe” in the US due to the very small amounts generally included in products, when it is included in formula, the infant tends to consume much more and is therefore at risk for negative health consequences, such as GI ulceration and intestinal inflammation. Carrageenan is banned for use in formula in the EU.

used as a confectionery mold release agent.

contained in many Nutritional Supplements

for its supply of magnesium.

Vitamin B3



Also called Niacin, Nicotinic Acid, Niacinimide, Nicotinic.



Acts as a co-enzyme in the release of energy from carbohydrates. Also needed to help breakdown fats and proteins. Aids in formation of red blood cells.

Since the 1950's doctors have used nicotinic acid to treat high cholesterol. Niacin is the only drug available that both substantially lowers the "bad" lipids (LDL), and increases the "good"(HDL) cholesterol. The reason this vitamin is not in the forefront of cholesterol therapy is because many people treated with high doses of niacin experience bothersome side effects such as; facial flushing, nausea, stomach pain, diarrhea and much more serious, liver damage.



Milk, eggs, meats (especially liver), chicken, fish, and most other protein-rich foods contain a significant amout of niacin. Also in smaller amounts in coffee and tea.



Dificiency is very rare in modern countries. Symptoms include: Pellagra (diarrhea, dermatitis, and dementia) Less severe symptoms of deficiency include irritability, loss of appetite, weekness and swollen tongue.

A white or yellowish-white, amorphous, odorless, water-insoluble powder, ZnO, used chiefly as a paint pigment, in cosmetics, dental cements, matches, white printing inks, and opaque glass, and in medicine in the treatment of skin conditions. Also called flowers of zinc, zinc' white'.

A word about "Partially Hydrogenated" Oils:



It is now known that the process of hydrogenation creates "trans fatty acids" (TFAs), which are toxic entities that enter cell membranes, block utilization of essential fatty acids (EFAs) and impede cell functionality. TFAs also cause a rise in blood cholesterol. These substances are not present in natural oils.



Trans fat, which is also called hydrogenated or partially hydrogenated vegetable oil. Trans fat is found in margarine and shortening and foods -- such as cookies, crackers and other commercially baked goods -- made with these ingredients. Trans fat raises LDL cholesterol and lowers high-density lipoprotein (HDL), the "good" cholesterol.



Hydrolyzed: A protein obtained from various foods (like soybeans, corn or wheat), then broken down into amino acids by a chemical process called acid hydrolysis. Hydrolyzed plant or vegetable protein is used as a flavor enhancer in numerous processed foods like soups, chilis, sauces, stews and some meat products like frankfurters. Hydrolyzation of protein inevitably creates some (processed) free glutamic acid (MSG).



Manufacturers are acutely aware that many consumers would prefer not to have MSG in their food. Some manufacturers have responded by using "clean labels," i.e., labels that contain only ingredient names they think consumers will not recognize as containing MSG -- names such as "hydrolyzed soy protein." Others advertise "No MSG," "No MSG Added," or "No Added MSG," even though their products contain MSG



ref: truthinlabeling.org



source: www.healthfinder.gov/news

Pantothenic acid, also called vitamin B5 (a B vitamin), is a water-soluble vitamin required to sustain life (essential nutrient). Pantothenic acid is needed to form coenzyme-A (CoA), and is critical in the metabolism and synthesis of carbohydrates, proteins, and fats. In chemical structure, it is the amide between D-pantoate and beta-alanine. Its name is derived from the Greek pantothen (pa?t??e?) meaning "from everywhere" and small quantities of pantothenic acid are found in nearly every food, with high amounts in whole-grain cereals, legumes, eggs, meat, and royal jelly. It is commonly found as its alcohol analog, the provitamin panthenol, and as calcium pantothenate.

Red 40 Lake

Adding “lake” after the name of a dye indicates that the dye is mixed with Aluminum Hydroxide. Aluminum hydroxide is safe as a food ingredient and often sold as an antacid. Mixing the Aluminum Hydroxide with Red 40 allows the manufacturer to color the surface of a solid and ensures that it will not run off easily if the product gets wet. See Red 40.

FD&C Red Dye #40 Information, Education and Discussion. Web. 16 May 2011. .





RED 40 ... Artificial coloring: Soda pop, candy, gelatin desserts, pastry, sausage. The most widely used food dye. While this is one of the most-tested food dyes, the key mouse tests were flawed and inconclusive. An FDA review committee acknowledged problems, but said evidence of harm was not "consistent" or "substantial." Like other dyes, Red 40 is used mainly in junk foods.



Ref : Center for science in the public interest



Banned in Denmark, Belgium, France, Germany, Switzerland, Sweden, Austria and Norway



A lake is a solid, non water soluble form of a dye. It's produced by mixing the dye with Aluminum Hydroxide. By itself Aluminum Hydroxide is a safe food ingredient and it's often sold as an antacid. When combined with Dye, the chemicals form a deep powder that can be applied to the outsides of tablets, gumballs and other solids. You may also notice this form listed in the ingredients as "Aluminum Lake"

Yellow 6 Lake

Adding “lake” after the name of a dye indicates that the dye is mixed with Aluminum Hydroxide. Aluminum hydroxide is safe as a food ingredient and often sold as an antacid. Mixing the Aluminum Hydroxide with Yellow 6 allows the manufacturer to color the surface of a solid and ensures that it will not run off easily if the product gets wet. See Yellow 6.

FD&C Red Dye #40 Information, Education and Discussion. Web. 16 May 2011. .





FD&C Yellow No.6; used in cereals, bakery, sweets, snack foods, ice cream, drinks and canned fish; synthetic; also in many medications including Berocca, Polaramine, Ventolin syrup; side effects are urticaria (hives), rhinitis (runny nose), nasal congestion, allergies, hyperactivity, kidney tumours, chromosomal damage, abdominal pain, nausea and vomiting, indigestion, distaste for food; seen increased incidence of tumours in animals; banned in Norway

Industry-sponsored animal tests indicated that this dye, the third most widely used, causes tumors of the adrenal gland and kidney. In addition, small amounts of several carcinogens contaminate Yellow 6. However, the FDA reviewed those data and found reasons to conclude that Yellow 6 does not pose a significant cancer risk to humans. Yellow 6 may also cause occasional allergic reactions.



Ref: Center for science in the public interest (http://www.cspinet.org/reports/chemcuisine.htm#Alphabetical)

Ref: Food additives guide (http://www.foodag.com/en/100.htm)



The manufacturer doesn't want the color to run off if the pill gets a little wet. The answer is to use a dye in a lake form.

A lake is a solid, non water soluble form of a dye. It's produced by mixing the dye with Aluminum Hydroxide. By itself Aluminum Hydroxide is a safe food ingredient and it's often sold as an antacid. When combined with Dye, the chemicals form a deep powder that can be applied to the outsides of tablets, gumballs and other solids. You may also notice this form listed in the ingredients as "Aluminum Lake"

Xylitol is a naturally occurring alcohol found in most plant material, including many fruits and vegetables. It is extracted from birch wood to make medicine.



Xylitol is widely used as a sugar substitute and in "sugar-free" chewing gums, mints, and other candies. However, sorbitol is the most commonly used sweetener in sugarless gums because it is less expensive than xylitol and easier to make into commercial products.



As a medicine, xylitol is used to prevent middle ear infections (otitis media) in young children, and as a sugar substitute for people with diabetes.



Xylitol is added to some chewing gums and other oral care products to prevent tooth decay and dry mouth.



Xylitol is sometimes included in tube feeding formulas as a source of energy.



Dog owners should know that xylitol can be toxic to dogs, even when the relatively small amounts from candies are eaten. If your dog eats a product that contains xylitol, it is important to take the dog to a veterinarian immediately.



How does it work?

Xylitol tastes sweet but, unlike sugar, it is not converted in the mouth to acids that cause tooth decay. It reduces levels of decay-causing bacteria in saliva and also acts against some bacteria that cause ear infections.

Aspartame

One of the most common artificial sweeteners is aspartame, also seen as Equal or Nutrasweet. It is 200 times sweeter than table sugar and lower in calories. It is composed of the amino acids aspartic acid and phenylananine, which are building blocks of proteins. The Food and Drug Administration (FDA) recommends the acceptable daily intake of 50 mg/kg of body weight/day. The European Food Safety Authority recommends only 40 mg/kg. There is much controversy on whether aspartame causes cancer. Expert agencies in the United States declare aspartame as safe to consume. A few studies have given rats aspartame with leukemia and lymphomas occurring in rats. However, many studies in the lab and by the National Cancer Institute (NCI) examined the effects of aspartame and saw no signs of aspartame as a carcinogen, or causing cancer. Health problems can still occur with the consumption of aspartame. People with phenylketonuria (PKU) should not eat foods with aspartame because phenylalanine is a component of aspartame and they cannot break down that specific amino acid. If it does, levels of phenylalanine can build up in the blood, preventing necessary chemicals to reach the brain.

"Aspartame." American Cancer Society :: Information and Resources for Cancer: Breast, Colon, Prostate, Lung and Other Forms. 17 Feb. 2011.

Web. 17 May 2011. .

FD&C Blue No.2, commonly added to tablets and capsules; also used in ice cream, sweets, baked goods, confectionary, biscuits, synthetic coal tar derivative; may cause nausea, vomiting, high blood pressure, skin rashes, breathing problems and other allergic reactions. Banned in Norway. The largest study suggested, but did not prove, that this dye caused brain tumors in male mice. The FDA concluded that there is "reasonable certainty of no harm."



A lake is a solid, non water soluble form of a dye. It's produced by mixing the dye with Aluminum Hydroxide. By itself Aluminum Hydroxide is a safe food ingredient and it's often sold as an antacid. When combined with Dye, the chemicals form a deep powder that can be applied to the outsides of tablets, gumballs and other solids. You may also notice this form listed in the ingredients as "Aluminum Lake"



Ref: Food additives guide

(http://www.foodag.com/en/100.htm)

Obtained either by dissolving cupric oxide in hydrochloric acid or by the action of chlorine on copper. Its principal use is in the food industry is for sweetening.

Pyridoxine Hydrochloride

Activated vitamin B-6 is extensively involved in the metabolism of amino acids. efficiently from pyridoxine in the liver. Ex cessive protein intake, alcohol or contraceptive use also indicates a greater need for vitamin B-6. It also plays a crucial role in the multiplication of cells.



Source: Vitamin & Mineral Safety 2nd edition - by John N. Hathcock PHD

Vitamin A is a fat-soluble vitamin that is essential for the function of all the organs in your body and is particularly important for growth and development. Acetate is a retinol form of vitamin A commonly used in supplements (this is a synthetic form of vitamin A). Vitamin A is essential for healthy eyes and vision, health of epithelial cells, growth, a healthy reproductive system, protection against infection, bone development and brain development. It is also important for the maintenance of the proper functioning of the immune system.

Vitamin B2, or riboflavin, is required to complete several reactions in the energy cycle. Reddening of the lips with cracks at the corners of the mouth, inflammation of the tongue, and a greasy, scaly inflammation of the skin are common symptoms of deficiency.Riboflavin (B2)- Classic riboflavin deficiency involves the lips, tongue, eyes, skin and nervous system. Vision changes, cheliosis (tiny lesions in the mouth or cracks in the corners of the mouth) tongue inflammation and discomfort eating or swallowing.



Riboflavin?s role in the body involves the metabolism of fats and proteins. Enzymes influenced by riboflavin are absolutely necessary to transport oxygen to the cells. A decrease in this vitamin can result in fatigue. New research indicates that migraine headache sufferers may benefit by riboflavin. 400mgs.day have been shown to lessen the incidence of migraines.



Required for red blood cell formation, antibody production, cell respiration and growth. Important for good muscle tone. Involved in metabolism of protein, protein fats, and carbohydrates. Necessary for good vision, skin, hair and nails.

Vitamin B-1, Perfectly safe, despite adding minuscule amounts of nitrate to our food.

Derived from Licorice root, mono-ammonium glycyrrhizinate is a unique product that has an extremely sweet taste. MAG can be used in many products, not only to sweeten, but also to enhance the natural product flavor while saving cost on expensive ingredients. It is used to flavor tobacco for expensive cigarettes.



Uses include dairy products, confections, baked goods, and beverages where sweetness or flavor enhancement is desired. It is an excellent addition to sauces such as gravy, BBQ, soy, beverages, chocolate puddings, ice cream, candies, cough syrups or cough drops and even cosmetics. Ammonium Glycyrrhizinate is an excellent foaming agent that acts as a co-emulsifier. It is also excellent in recipes that require gelling or suspension properties for a consistent feeling in the mouth or a stable cloud effect in the product.



Very small quantities are required to achieve the desired results, usually a few parts per million. However, varying amounts should be evaluated in your product for best taste.



MAG is up to 50 times sweeter than sucrose — and can greatly enhance an already sweetened product as a result of synergies with both natural and synthetic sweeteners.

One of the most important and abundant of the carotenes, a portion of which the liver converts to vitamin A. It should be noted, however, that while excess vitamin A can be toxic to the body, residual beta carotene is quickly eliminated. Scientists now believe that beta carotene is a powerful ANTIOXIDANT with properties that can contribute to reducing cancer and heart disease. It's found in vegetables like carrots, broccoli, squash, spinach and sweet potatoes. Beta carotene's orange-yellow pigment is also used as a coloring in foods like butter and margarine.Carotenoids are the red, orange and yellow plant pigments that give fruits and vegetables their vivid colors. All fruits and vegetables contain varying concentrations of carotenoids, but their colors are often covered up by green chlorophyll contained in the plant.



There are more than 600 different naturally-occuring carotenoids. Some of them have been identified as playing a vital role by protecting our cells and tissues from the damaging effects of free radicals and singlet oxygen. Lycopene, the carotenoid that gives tomatoes their red color, is particularly effective at quenching the destructive free radical singlet oxygen.

Folic acid is the synthetic form of the B vitamin folate. Folic acid is necessary for the synthesis of nucleic acids and the formation of red blood cells. Folic-acid deficiency most commonly causes folic-acid-deficiency anemia. Symptoms include gastrointestinal problems, such as sore tongue, cracks at the corners of the mouth, diarrhea, and ulceration of the stomach and intestines. Large doses of folic acid can cause convulsions and other nervous-system problems.

The Food and Drug Administration (FDA) regulations require enriched grain products to contain this essential vitamin.



Current studies have discovered a link between folic acid and brain function in older people. The study divided 818 people ages 50 to 75 to take either a vitamin containing 800 micrograms of folic acid a day, or a dummy pill, for three years.



On memory tests, the supplement users had scores comparable to people 5.5 years younger, Durga said. On tests of cognitive speed, the folic acid helped users perform as well as people 1.9 years younger.

a colorless crystalline growth vitamin of the vitamin B complex found especially in yeast, liver, and egg yolk; no side effects are known.



One of the B-vitamins that functions as a co-enzyme in the metabolism of carbohydrates and fats. The biotin co-enzyme also serves in crucial roles in the breakdown of amino acids. Deficiency of the vitamin can result in hair loss and dermatitis, thus it is found as a popular ingredient in hair care products.

Vitamin B12, also called cobalamin, is important to good health. It helps maintain healthy nerve cells and red blood cells, and is also needed to make DNA, the genetic material in all cells . Vitamin B12 is bound to the protein in food. Hydrochloric acid in the stomach releases B12 from protein during digestion. Once released, B12 combines with a substance called intrinsic factor (IF) before it is absorbed into the bloodstream.

Good sources include meat, particularly liver, salmon, cod, milk, cheese, eggs, yeast extract, and some fortified breakfast cereals.

Vitamin D, calciferol, is a fat-soluble vitamin. It is found in food, but also can be made in your body after exposure to ultraviolet rays from the sun. Vitamin D exists in several forms, each with a different activity. Some forms are relatively inactive in the body, and have limited ability to function as a vitamin. The liver and kidney help convert vitamin D to its active hormone form.

The major biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus . Vitamin D aids in the absorption of calcium, helping to form and maintain strong bones. It promotes bone mineralization in concert with a number of other vitamins, minerals, and hormones. Without vitamin D, bones can become thin, brittle, soft, or misshapen. Vitamin D prevents rickets in children and osteomalacia in adults, which are skeletal diseases that result in defects that weaken bones

Magnesium is a naturally occurring mineral. Magnesium is important for many systems in the body especially the muscles and nerves.



Magnesium oxide is used as a supplement to maintain adequate magnesium in the body.



Before taking magnesium oxide, tell your doctor if you have any other medical conditions, allergies, or if you take other medicines or other herbal/health supplements. Magnesium oxide may not be recommended in some situations.

Potassium iodide, also known as KI, is a form of iodine. Potassium iodide has been determined by the U.S. Food and Drug Administration (FDA) to be a safe and effective method to block exposure to one product of a nuclear release - radioactive iodine. Radioactive iodine, either inhaled or ingested through contaminated food or milk, can increase a person's risk of developing thyroid cancer.



The thyroid functions to absorb and store iodine, but it can hold only so much, and will just as readily absorb non-radioactive potassium iodide as radioactive iodine. Because of this, one dose of potassium iodide, which is not harmful to the thyroid, works by filling the gland so it cannot take up any radioactive iodine.