Introduction
Iodine is one of the essential components for the growth and development of all infants. It is one of the important constituents of thyroid hormones, thyroxine, and triiodothyronine. It is present in breast milk that can vary in amount depending on total iodine levels in the mother's body. The iodine demand increases in pregnant mothers for fetal development. Any deficiency or excessive concentration of iodine in pregnant women can lead to iodine deficiency in newborns. Read the article in detail to know more about iodine intake and its influence on breastfeeding.
What is Iodine and What is its Importance?
Iodine is a mineral that is required by our body to produce thyroid hormones. Thyroid hormones are responsible for maintaining body metabolism and many other functions like the development of the brain and bones. The average daily intake of iodine depends on the age of the person. Recommended daily intake of iodine at different ages of life are:
-
Birth to six months:110 micrograms per day.
-
7 to 12 months infant: 130 micrograms per day.
-
1 to 8 years Children: 90 micrograms per day.
-
9 to 13 years Children: 120 micrograms per day.
-
14 to 18 years (Teenage): 150 micrograms per day.
-
Adults:150 micrograms per day.
-
Pregnant women: 220 micrograms per day.
What Is Recommended Dietary Allowance of Iodine in Breastfeeding Mothers?
-
Before Pregnancy: 150 micrograms per day.
-
During Pregnancy: 220 micrograms per day.
-
Breastfeeding: 290 micrograms per day.
The recommended dose of iodine in pregnant and breastfeeding mothers, suggested by the American thyroid association and American academy of pediatrics, is around 150 micrograms per day. A prenatal vitamin supplement should be taken daily by pregnant women.
What Are Forms of Iodine Dietary Supplementation Available in the Market?
The dietary supplements of iodine available in the market are
-
Potassium iodide.
-
Sodium iodide.
-
various other multivitamin supplements contain iodine.
What Are the Normal Iodine Levels Recommended by the World Health Organization?
-
The normal drug levels of iodine recommended by the World Health Organization (WHO) for lactating mothers is around 100 mcg/kg.
-
The normal iodine concentration in breast milk recommended by other organizations is around 60 and 450 mcg/kg.
Who Is at Risk of Deficiency of Iodine While Breastfeeding?
Women at risk of iodine deficiency while breastfeeding is
-
Women who do not consume iodized salt.
-
In women who are smokers.
-
Women who do not consume dairy products.
-
Women who do not consume food containing iodine, such as low-fat milk, eggs, seafood, and bread prepared commercially.
-
Women who consume food containing goitrogens that affect the thyroid gland resulting in disturbance in the formation of thyroid hormones. A deficiency of iodine can increase by stimulating thyroid hormone (TSH), which may lead to subclinical hypothyroidism.
How Does Iodine Deficiency in Breastfeeding Mothers Influence the Health of Infants?
The deficiency of iodine in breastfeeding mothers had a greater impact on the growth and development of infants. A few below-mentioned examples of health impacts on infants are
-
Development of Infant and Fetus: The deficiency of iodine in breastfeeding mothers can disrupt the child's growth and development and can increase the risk of a condition called cretinism. According to the American thyroid association, women who are planning to become pregnant, breastfeeding mothers, and pregnant women should consume 150 micrograms of iodine per day. Any deficiency in iodine intake can affect the neurological development of the child.
-
Effects on Cognitive Function of Infants: Severe iodine deficiency in breastfeeding mothers can result in deleterious effects on the growth and development of the brain and nervous system. According to research, even a minute deficiency of iodine in breastfeeding mothers or during pregnancy can have a greater impact on the cognitive development of infants or children.
-
Fibrocystic breast disease: Painful breasts and lumps in the breast are seen in the case of fibrocystic breast disease in women with iodine deficiency. It affects women in menopause or during reproductive age.
How Does Iodine Excess Affect the Health of Breastfeeding Mothers?
-
Excess of iodine in breastfeeding mothers also impacts the health of infants or children. Increased amounts of iodine in breast milk can result in hypothyroidism in neonates or breastfed infants. Continuous breastmilk intake high in iodine concentration by infants or newborns may lead to permanent dysfunction of thyroid function in infants.
-
Excess of iodine can result in swelling of the thyroid gland, increase risk of thyroid cancer, enlarged thyroid gland, and permanent dysfunction of the thyroid gland.
-
Increased doses of iron can lead to a burning sensation in the mouth, throat, and stomach.
-
Nausea, vomiting, fever, weak pulse, diarrhea, and coma are other harmful effects of excess iodine in the body.
-
Synthesis of thyroid hormones reduces abruptly in case of high amounts of iodine in the body which is known as “Wolff Chaikoff Effects”.
Should Iron Levels Be Checked Regularly During Pregnancy?
Healthcare professionals usually check thyroid hormone levels (T3, T4, and TSH) by performing blood tests during pregnancy. Normal thyroid hormone secretion indicates normal serum iodine levels.
What Are the Few Limitations of Standard Iodine Prophylaxis in Pregnant and Breastfeeding Mothers?
Different physiological changes are observed in pregnant and breastfeeding mothers regarding the metabolism of iodine, such as
-
Increase secretion of iodine in urine.
-
Increase in the transfer of iodine from the mother to the fetus while the placenta.
-
Increase demand for iodine in the fetal thyroid gland during the second trimester of pregnancy.
These factors increase the daily demand for iron in pregnant and lactating women.
Conclusion
Iodine is an essential nutrient in breast milk and is required for the growth and development of infants. Adequate daily dietary intake of iodine in breastfeeding women should be around 150 micrograms. Breastfeeding mothers need to consume a balanced diet containing iodine-rich foods to maintain the normal levels of iodine in the body. It is crucial for breastfeeding mothers to take vitamin supplements containing iodine in case a deficiency of iodine is diagnosed by the doctors after a laboratory examination. Maintenance of normal iodine levels in breastfeeding mothers should be recommended to prevent harmful effects on the health of infants or children and to ensure optimal thyroid functions in both breastfed infants and breastfed mothers.