Diabetes drink

So I had my diabetes test this morning (1hr one) and I noticed something. I had a killer headache this morning, as I’ve had most mornings/ days lately. About 20 minutes after I had my drink, my headache was gone. Totally. No remnants of it at all which is also unusual. I have to say it was one very positive side effect of having to drink that! 😂 (though I don’t think it tastes horrible to begin with. Wouldn’t be my first choice to drink but it’s not awful.)