This happens easier than you would think, especially if you are being strict and only using organic lemons. Many organic stores are closed on Saturday or Sunday. And sometimes there is no store open at all. If you find yourself without lemons, just drink the maple syrup. If you are out of both, and are feeling low on energy, find a natural, sugar-based liquid. You want to treat your body like a living IV (intravenous). Just get some calories in there without disturbing your resting system.