For most sleepers, reBloom should work 30-60 minutes after you drink the product for the first time. If you consumed excessive amounts of caffeine that day, have altered your sleep routine, or are sleeping with some sort of sleep disturbance (bright light, loud noises, etc.) it will not work as well as under normal conditions.
Although reBloom is clinically proven, no product, including reBloom, works for everyone. For just that reason, we have a 100% money-back guarantee. Read more about the reBloom guarantee here.