[5] Robuschi G et al.  J Endocrinol Invest.  1986 Aug; 9(4): 287-291.

[6] Karbownik M and Lewinski A.  The role of oxidative stress in physiological and pathological processes in the thyroid gland: possible involvement in the pineal-thyroid interaction.  Neuro Endocrinol Lett. 2003 Oct; 24(5): 293-303.

[7] Benvenga S et al.  The usefulness of L-carnitine, a naturally occurring peripheral antagonist of thyroid hormone action, in iatrogenic hyperthyroidism: a randomized, double blind, placebo controlled clinical trial.  J Clin Endocrinol Metab. 2001 Aug; 86(8): 3579-3594.

[8] Shakir K et al.  Nicotinic acid decreases serum thyroid hormone levels while maintaining a euthyroid state.  Mayo Clin Proc. 1995 June; 70(6): 556-558.

[9] Pizzorno J, Murray M, Joiner-Bey H.  The Clinicians Handbook of Natural Medicine.  2002 Churchill Livingstone. Pages 242-249.

[10] Goswami UC and Choudhury S.  The status of retinoids in women suffering from hyper and hypothyroidism: interrelationship between vitamin A, beta-carotene and thyroid hormones.  Int J Vitam Nutr Res.  1999 Mar; 69(2): 132-135.

[11] Bianchi G et al.  Oxidative stress and anti-oxidant metabolites in patients with hyperthyroidism; effect of treatment.  Horm Metab Res. 1999 Nov; 31(11): 620-624.

[12] Pizzorno J, Murray M, Joiner-Bey H.  The Clinicians Handbook of Natural Medicine.  2002 Churchill Livingstone. Pages 242-249.

[13] Seven A et al.  Biochemical evaluation of oxidative stress in propylthiouracil treated hyperthyroid patients.  Effects of vitamin C supplementation.  Clin Chem Lab Med. 1998 Oct; 36(10): 767-770.

[14] Pizzorno J, Murray M, Joiner-Bey H.  The Clinicians Handbook of Natural Medicine.  2002 Churchill Livingstone. Pages 242-249.

[15] Auf'mkolk M et al.  Extracts and auto-oxidized constituents of certain plants inhibit the receptor binding and the biological activity of Grave's immunoglobulin.  Endocrinology. 1985 May; 116(5): 1687-1693.