Fig. 6. IL-2 and IFN- in supernatant from PBMC obtained from middle-aged men and incubated with PHA (5 µg/mL) plus media, the dietary supplement (containing androstenedione and DHEA at 10^-7 M), androstenedione (10^-7 M) or DHEA (10^-7 M). Results are expressed as mean ± SEM.