The negative association between serum free testosterone and leptin is dependent on insulin-like growth factor-binding protein 1 in healthy young and middle-aged men
OBJECTIVE: Previous studies have shown that serum levels of testosterone correlate negatively with leptin and positively with insulin-like growth factor binding protein 1 (IGFBP-1). The present study examined whether these associations are linked.DESIGN AND PATIENTS: The association between serum levels of IGFBP-1, free testosterone and insulin on one hand and leptin on the other hand were investi
