Influence of diet on plasma steroids and sex hormone-binding globulin levels in adult men.

Several experimental studies have suggested that diet can alter the production and metabolism of steroids in men. The purpose of this study was to determine the levels of unconjugated steroids and steroid glucuronides as well as sex hormone-binding globulin (SHBG) among normal adult men who were either omnivorous or vegetarians. The participants were white volunteers ranging from 25-35 years of age and the blood samples were taken between 0900 h and 1000 h and between 1600 h and 1700 h for two consecutive days.

Cortisol and catecholamines response to venisection by humans with different blood groups.

Hormonal response following a minor physiological stress induced by bleeding in a blood donor clinic was investigated in 134 humans with different blood groups. After venisection, serum cortisol concentration (mean +/- SD) was found highest in blood group A donors (455 +/- 217 nmol/L), followed by group B (364 +/- 206), AB (325 +/- 154) and O (297 +/- 110). In 14 subjects of blood group A compared to an equal number of blood group B subjects, mean plasma adrenaline level was higher in group A (0.

A reproducible estimation of triiodothyronine uptake.

A simple method for the determination of triodothyronine (T3) uptake using I125-T3 and dextran coated charcoal is described. This reaction is time dependent after the addition of dextran coated charcoal. Effect of temperature, concentrations of I125-T3 and charcoal are reported.