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Quest Vitamins LTD,
8 Venture Way,
Aston Science Park,
B7 4AP.

Tel: 0121 359 0056
Fax: 0121 359 0313
Registered in England No. 2530437

Thyroid Disorders


An endocrine gland in the neck, the thyroid regulates the body?s metabolic rate. Disorders result when the thyroid secretes too little or too much thyroxine.

A deficiency of thyroxine secretion (hypothyroidism) occurs when insufficient Iodine is taken in with the diet, a condition prevalent in certain areas of the world, particularly ones remote from salt water. In this condition, all body processes slow down and metabolic rate lowers dramatically. The result of such a deficiency is usually goitre, or enlargement of the thyroid.

Excessive secretion of thyroxine (hyperthyroidism) causes an increased metabolic rate, loss of weight despite healthy appetite, protrusion of the eyeballs, rapid pulse, and irritability. The condition (also known as Grave?s disease) may be accompanied by enlargement of the thyroid. Treatment is by surgical removal of part of the gland, by administering antithyroid drugs (chemicals that inhibits thyroxine formation), or by administering radioactive Iodine, which destroys over-functioning thyroid tissue.




Evening Primrose Oil
Niacin (1)
Vitamin A
Vitamin C
Vitamin E (3)
Zinc (2)


1. Shakir KMM, Kroll S, Aprill BS, et al. Nicotinic acid decreases serum thyroid hormone levels while maintaining a euthyroid state. Mayo Clin Proc 1995;70:556-58.
2. Hartoma TR, Sotaniemi EA, Maattanen J. Effect of Zinc on some biochemical indices of metabolism. Nutr Metab 1979;23:294-300.
3. Krishnamurthy S, Prasanna D: Serum Vitamin E and lipid peroxides in malnutrition, hyper and hypothyroidism, Acta Vitaminol Enzymol, 6(1), 1984, p 17-21.

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