[Weight changes under thyroxine substitution for euthyroid goitre (author's transl)]

Area of Science:

• Endocrinology
• Thyroidology
• Metabolic Research

Background:

• Euthyroid goiter is a common thyroid condition.
• Thyroxine replacement therapy is a standard treatment for goiter.
• The potential impact of thyroxine on body weight in euthyroid individuals requires clarification.

Purpose of the Study:

• To investigate the effect of daily thyroxine supplementation on body weight.
• To compare weight changes in patients with euthyroid goiter receiving thyroxine versus a control group.

Main Methods:

• A nine-month prospective study involving 213 out-patients with euthyroid goiter on thyroxine (50-150 mcg/day).
• A control group of 40 individuals received iodine-containing salt.
• Body weight and total thyroxine levels were monitored.

Main Results:

• Average weight gain in the thyroxine group was 0.34 +/- 0.19 kg, compared to 0.44 +/- 0.38 kg in the control group.
• Both groups showed a trend of weight gain in individuals under 50 years and weight loss in older individuals.
• No statistically significant difference in weight change was observed between the groups.

Conclusions:

• Thyroxine, when administered in standard therapeutic doses for goiter treatment, does not influence body weight in patients with normal thyroid metabolism.
• Age appears to be a more significant factor in body weight fluctuations than thyroxine treatment in this euthyroid population.