The problem with n=1 testing is this. I have a couple friends over on BB.com who use glucometer testing for every ingredient under the sun, and they noticed next to nothing with the two ingredients in question. The studies show benefit in type 2 diabetics but none in healthy populations. You personally may respond well to them, but there may be confounding factors (i.e. how is your insulin sensitivity overall?). Interestingly enough, based on some n=1 glucometer testing over on BB.com, pterostilbene was the strongest GDA tested.
I agree n=1 testing is not usually the best way to determine the effectiveness of a substance. In my testing I was very precise and meticulous.
I tested 7 days using VS/CP, 6 meals per day. And 7 days without VS/CP, all the same meals and exact times.
Took 6 tests surrounding meal..
1) 5 Minutes prior to dosing VS/CP
2) 5 Minutes after dosing VS/CP (immediately before meal)
3) Immediately after meal
4) 15 Minutes after meal (Time in which Blood Glucose usually would peak)
5) 30 Minutes after meal
6) 1 hour after meal
I even noticed my blood glucose upon rising was around 65 mg/dL mid week into VS/CP use.
During the week not using VS/CP, my blood glucose upon rising was around 75 mg/dL, still very good.
I believe I am insulin sensitive, which did not seems to be the case for subjects in all the studies I've seen.
All week using VS/CP I noticed significantly lower blood glucose levels. For example, upon rising I would eat 5.2 oz Baked Potato with 50g Whey Protein and my blood glucose would move from 77 mg/dL to 110 mg/dL. When using VS/CP immediately before this same meal at the same time of day I would see my blood glucose rise from 77mg/dL to 95mg/dL. Both measurements recorded at 15 minutes PP.
I also noticed during all days of the week in which I used VS/CP, that I would look significantly drier towards the end of the day, even after consuming the majority of my carbs high glycemic. While during the week in which I did not use VS/CP I was much more watery and soft. No joke!
Now I'm not saying these are the be all end all for GDA's. As I have not tested many others. But I find these work VERY well.
I'm thinking of maybe doing very detailed tests on N-R-ALA, as well as berberine, banaba, etc. Maybe even log them all on here.
I also have great success with Anabolic Pump. It definitely keeps my muscles more pumped and full, than VS/CP.
I admit, it's very hard to argue with clinical studies. But I have found great success with VS/CP for myself.
There is a great thread stickied over at MD.com forums. It's long but I suggest you guys check it out. I don't agree with everything in it, but a lot of people on there also saw great success in keeping blood sugar low with VS/CP use.