I have a customer who has duplicated this experiment
Three months of 50mg daily DHEA for men and women showed a 10% elevation in serum IGF-1 [CLINICAL ENDOCRINOLOGY; Morales,AJ; 49(4):421-432 (1998)]. But a full year of 50mg daily DHEA showed no positive effect on either muscle strength or muscle cross-sectional area [ARCHIVES OF INTERNAL MEDICNE; Percheron,G; 163(6):720-727 (2003)]. (DHEA may be a safer means of raising serum IGF-1 than growth hormone replacement.)
A customer of mine (lab) has duplicated the 10 % increase in IGF-1 level with 50 mg/ml of oral DHEA.
Sounds like a cheap way to increase your IGF-1 level 10 % !