RDAs, iodine

Health Canada has advised consumers against using some products containing iodine (SEAVITE Premium Atlantic Kelp tablets), since these products, when consumed according to the label instructions, can provide 25 times the recommended daily allowance (RDA) of iodine for adults this could lead to serious adverse health consequences (9). The RDA for iodine ranges from 90... 

Anonymous. Iodine. Some products contain more than the RDA. WHO Pharm Newslett 2003 3 2. 

Iodine The major function of I in the human body is the formation of the thyroid hormone (thyroxin). It is also involved in muscle function and growth. The RDAs are 150 mg (adult male) and 110 mg (adult female) per day [15]. 

This increased to 100 pg/kg when feed was supplemented with iodine (Jahreis et al., 1999). Mean concentrations in the range 100-300pg-iodine/kg milk were found in more recent studies in Germany (Bader et al, 2005 Preiss et ai, 1997 Schone et ai, 2003 Launer and Richter, 2005) and other European countries, e.g., Denmark (Rasmussen et al., 2000) and Norway (Dahl et ai, 2003)- The German Society of Nutrition s recommended daily allowance (RDA) of iodine for young people and adults is 200 pg iodine (D-A-CH, 2000). Half a liter of milk with lOOpg-iodine/ kg would provide a quarter of the RDA, but half a liter of milk with 200 pg - iodine/kg would provide half... 

Despite controversy over the relatively low German UL, iodine supplementation, like selenium, has a high application risk (BfR, 2006). This is demonstrated by the slight difference between the RDA of iodine (200 pg iodine/adult/day) and the UL or upper tolerable level (500 pg -iodine/adult/day D-A-CH, 2000). The UL differs from the RDA by a factor of 2.5. Thus suppiementation with more than the 2.5 times the RDA to prevent or treat deficiency and hypothyroidism increases the risk of producing the adverse effects of excess iodine (hyperthyroidism). 

Note-. Al, adequate intake RDA, recommended daily allowance. http //www.iccidd.org/pages/iodine-deficiency.php http //books. nap.edu/openbook. php record id= 10026 page=272. 

Iodine deficiency during the perinatal period and exposure to an iodine excess is quite conspicuos. The iodine intake of newborns is entirely dependent on the iodine content of breast milk and formula preparations used to feed them. The minimum recommended dietary allowance (RDA) for different age groups is summarized in Table 50.1. To meet such requirements, the iodine content of formulas for premature newborns should contain 20 j,g/dl, and that of first and follow-up preparations 10 j,g/dl. We refer here to these new... 

Table 50.1 Daily iodine requirements in infants and children (RDA)...

Fortification vehicle/country/author Serve size Iodine/ micronutrient + iodine Level of iodine per serve or per lOOg or as % RDA Sait used... 

Parboiled milled brown rice, Thailand (Tulyathan et ai, 2007) lOOg Iodine only 96 pg iodine/IOOg of rice, lOOg fortified parboiled rice daily meets about 60% Thai RDA KIO3 or KI or KI -1- KIO3... 

Beverage powder, Botswana (Abrams eta/., 2003) 6-11 240 ml reconstituted drink consumed for 8 weeks Iodine -1- micronutrients 60r g Kl/serve, 50% RDA per serve KI... 

Pro-Iodo National Program for Prevention and Control of Iodine Deficiency Disorders RDA Recommended Dietary Alowances... 

In 2001, the recommended dietary allowance (RDA) of iodine was re-evaluated by the Food and Nutrition Board (FNB) of the United States Institute of Medicine. The new amounts were calculated using several methods, including the measurement of iodine accumulation in the thyroid glands of individuals with normal thyroid function (Food and Nutrition Board, 2001) (Table 124.1). 

Table 124.1 Recommended dietary allowances (RDA) for iodine in males and females (rxg/day)...

Iodine s RDA is the amount of iodine intake recommended by the FNB of the United States Institute of Medicine to avoid IDDs. 

In small amounts, the fluoride ion (often consumed as NaF) prevents tooth decay. According to the American Dental Association, an adult female should consume 3.0 mg of fluorine per day. Calculate the amount of sodium fluoride (45.24% F) that a woman should consume to get the recommended amount of fluorine. 78. The iodide ion, usually consumed as potassium iodide, is a dietary mineral essential to good nutrition. In countries where potassium iodide is added to salt, iodine deficiency or goiter has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 /ig/day. How much potassium iodide (76.45% 1) should you consume to meet the RDA ... 

Prevention of goiter may sometimes be achieved in endemic areas of developing countries by the intramuscular injections of iodized oil once every 2 to 3 years. However prevention of goiter is usually achieved in the developed countries by the use of iodized salt (3 g of which furnishes 228 meg [micrograms] of iodine or slightly more than the Recommended Dietary Allowance [RDA] of 200 meg per day for lactating women). Most people use more than 3 g of salt per day. 

Iodine. Iodine is present in milk, but in variable amounts. As sea water is rich in iodine, milk from coastal agricultural areas contains more iodine than milk from inland areas. The iodine content of milk is highly dependent upon the composition of the animal s feed it can be increased by as much as 200 times by adding iodine to the feed or by giving iodized salt blocks. Whole milk normally contains 13 to 37 meg iodine per 100 g. So, two 8-oz glasses (480 ml) of milk supply about 25 to 69% of the iodine RDA for an adult man, 25 to 50 years of age. 

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