Drinking lemon water as soon as you wake up spikes your energy levels physically and mentally. Lemon water gives you steady, natural energy that lasts the length of the day by improving nutrient absorption in your stomach. You need to drink it first thing in the morning (on an empty stomach) to ensure full absorption. You should also wait 15–30 minutes after drinking it before eating (perfect time to squeeze in some exercise). Lemons are packed with nutrients; they’re chock full of potassium, vitamin C, and antioxidants. If you’re under 150 pounds, drink the juice of half a lemon (a full lemon if you’re over 150 pounds). Don’t drink the juice without water because it’s hard on your teeth.