Raspberry leaf tea and GD??

I know that this topic has been posted a few times recently but i just noticed a trend and was wondering if anyone else noticed this too? I failed my 1 hour test and i was told that i had GD and there was no need for the 3h test. Anyway, i have been testing my blood sugar 4x a day. I also started drinking this tea recently and i noticed that if i drink it while i eat my meal, my blood sugar will be lower than when i eat the same exact thing without the drink? Does the raspberry leaf tea make anyone else's blood sugar lower?