Blood gastrin levels in hyperthyroidism.

Serum gastrin concentrations were measured in 22 untreated and 10 treated thyrotoxic patients. In contrast to similar studies carried out in Japan, serum gastrin levels were normal in hyperthyroid subjects. The mean value in hyperthyroid subjects (94.8 +/- 34.5 pg/ml) was higher than that in the treated patients (73.6 +/- 33.2 pg/ml), but the difference was not significant (P greater than 0.05).