Having reviewed the research and user experiences for years, I find DSIP most impressive not for any single dramatic effect, but for how it seems to bring multiple sleep-related systems into better alignment
Honestly, though, the choice between these scenarios comes down to your specific needs
Out of 41 RCTs, 39 studies have shown a significant lowering effect of L-carnitine supplementation on FBG (mg/dl) (69, 7180), 19 studies on serum insulin (pmol/l) (51, 5355, 57, 59, 61, 63, 68, 7176, 80), 20 studies on serum HbA1c (%) (5355, 57, 58, 61, 63, 66, 67, 71, 74, 77, 79, 80), and 17 studies on HOMA-IR (50, 5457, 59, 61, 63, 68, 7073, 75)
Chua B, Flood V, Rochtchina E, Wang JJ, Smith W, Mitchell P
(2010) Selective autophagy in cancer development and therapy, Cancer Res