Glucorell - take 1 pill for every 30g of carbs ingested 15-30 minutes before eating said carbs.
I take the Trex with food and only take them early in the day so they won't affect my sleep.
Sesamax you can take 2-3x a day --> the lower end of the dose (what it says on the bottle) if you're not overeating a bunch, the higher end if you are.