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Influence of meal composition on the postprandial response of the pituitary–thyroid axis

Kamat V, Hecht WL, Rubin RT. Influence of meal composition on the postprandial response of the pituitary–thyroid axis. Eur J Endocrinol 1995;133:75–9. ISSN 0804–4643

Ingestion of food can result in an acute decline of serum thyrotropin (TSH) concentrations, but it is not known whether meal composition and/or stomach distension are influential. Normal men and women were given a normocaloric or hypocaloric, isobulk meal at lunch and at dinner in a randomized design. The normocaloric, but not the isobulk, meal resulted in a significant decline in serum TSH at both lunch and dinner; thyroid hormones and cortisol were not affected significantly. These findings suggest that meal composition is influential in the acute postprandial decline of serum TSH in man. A possible mechanism is food-induced elevation of somatostatin and consequent suppression of TSH secretion.

Robert T Rubin, Neurosciences Research Center, Allegheny General Hospital, 320 E North Ave. Pittsburgh, PA 15212-4772, USA

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