Iodine is an essential micronutrient. The total body content of iodine is about 50 mg. The blood level is about 8 to 12 micro- grams/dl.

Functions

1. It is required for the synthesis of thyroid hormones

2. Minute amounts are required for growth, development and well being.

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Sources :

The best sources of iodine are sea foods (e.g. sea fish and sea salt) and codliver oil. Small amounts are present in milk, meat, cereals and vegetables.

Deficiency:

Deficiency of iodine leads to iodine deficiency dis­orders which include

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1. Goiter and hypothyroidism.

2. Retarded physical growth and mental development.

3. Spontaneous abortion and still birth.

4. Neurological cretinism.

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5. Myxoedematous cretinism.

Requirement: 150 micrograms per day.