Abstract
The tubular reabsorption of Ca has been studied by means of Ca clearance investigations in 16 patients with non endocrine diseases during long term therapy with small doses of corticosteroids. The tubular reabsorption of Ca was reduced in 7 patients. This is attributed to the anti-anabolic action of the corticosteroids on the cells of the tubules. Ca reabsorption became normal on administration of anabolic steroids.