Iodine

Question 1

distribution of iodine in the body

Answer 1

• normal =20-30 mg of iodine
• > 75%= thyroid gland
• rest= mammary gland, gastric mucous and blood

Question 2

iodine absorption

Answer 2

• occurs both as free and protein bound in blood
• stored in thyroid
• absorbed in the form of iodine

Question 3

iodine functions

Answer 3

• thyroid hormone synthesis

- T3/T4

Question 4

iodine deficiency

Answer 4

goiter:

• -enlargement of thyroid gland due to over stimulation
• -more prevalent in women
• -South America/India

Goitrogens:

• blocks iodine absorption
• -cabbage
• -turnips
• -peanuts
• -broccoli/cauliflower
• -soy beans

Question 5

dysphagia

Answer 5

trouble swallowing

Question 6

dysphea

Answer 6

trouble breathing

Question 7

iodine deficiency- cretinism

Answer 7

• deficiency during pregnancy
• causes= fetal death, irreversible
• short stature
• protuberant abdomen
• swollen features

Question 8

iodine recommendation

Answer 8

• RDA (AI)- 150 mg/d

- UL- 1,100 mg/d

Question 9

iodine food sources

Answer 9

• seaweed
• processed foods
• iodized salts

Question 10

iodine toxicity

Answer 10

• humans have a high tolerance
• paradoxical goiter
• -enlarged thyroid
• -repletion must be slow
• -Japan/China because of seaweed