11 surprising things may be draining your energy without you even knowing it. Reviewed by Amita Shroff, MD Sure, we all get draggy from time to time. A sleepless night here and there, a stressful day at the office, or one too many Krispy Kremes can take their toll. But when you're constantly feeling drained, it might be time to look at what's bringing you down. Check out these energy zappers and see how many apply to you. What other things do you find pull you down during the day? Share with others on WebMD's Health Cafe board.) One key to cutting back on sugar is having the right food with you so you don't head to the nearest vending machine.