When describing the 5-Hour Energy feeling, some people say it's like the sun coming up in my head. That's because when you're feeling groggy and lethargic, 5-Hour Energy wakes up your brain and gets you back to feeling the way you want to feel bright, alert, focused and energetic. What you won't feel is jittery, or crash. That's because, unlike other energy drinks, 5-Hour Energy doesn't jack you up with sugar, caffeine and herbal stimulants. Instead, it's packed with stuff that's good for you B-vitamins, amino acids and enzymes. To get anything out of those canned energy drinks you have to force down a lot of liquid up to 24 ounces for some of them. It takes just seconds to slam down a 2-ounce 5-Hour Energy shot. That means its energizing ingredients get into your system faster. In a few minutes you can feel 5-Hour Energy brushing away the cobwebs and helping you regain the alert, focused feeling you need to get through your day. Canned energy drinks give you a lot of sugar, caffeine and herbal stimulants which can make you feel jittery, shaky or tense. But 5-Hour Energy's blend of vitamins, amino acids and enzymes gives you hours of smooth energy. We named it 5-Hour Energy for a reason. People typically feel an elevated sense of energy, focus and alertness for about five hours. Individual results will vary, of course. And when that feeling wears off, it does so gently. Other energy drinks can make you feel jittery and tense for a short time then let you down with a crash leaving you feeling worse than before. FOR MAXIMUM ENERGY: Drink entire bottle at one time. FOR MODERATE ENERGY: Drink a half bottle or less. Re-seal bottle. No refrigeration required. Discard remainder after three days. Contains about as much caffeine as a cup of coffee. Limit caffeine products to avoid nervousness, sleeplessness, and occasionally rapid heartbeat. You may experience a Niacin Flush (hot feeling, skin redness) that last a few minutes. This is cause by Niacin (Vitamin B3) increasing blood flow near the skin. Not for use by children under 12 years of age. Phenylketonurics: Contains phenylalanine. Other Ingredients: Purified water, Natural & Artificial Flavors, Potassium Sorbate & Sodium Benzoate (to protect freshness), Sucralose.