Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to get potassium nitrate [title] Make your way to a local drugstore or pharmacy. [step] You'll have the most luck finding potassium nitrate supplements at a store that specializes in body building supplements, like gnc. Potassium nitrate is sometimes used for athlete enhancement.

Ending1: [title] Pay attention to the color of your urine. [step] If you have a pale urine, have a cloudy urine, or experience frequent vaginal urination, potassium nitrate is a good substitute. Ending2: [title] Locate the supplements section if you've gone to a pharmacy. [step] If you're in a pharmacy or drugstore, go to the supplements section and look for a potassium nitrate supplement. Ending3: It works mostly on food and is not difficult to get. [title] Open a package of your potassium nitrate. Ending4: [title] Don't confuse potassium nitrate with a regular natural substance. [step] Potassium nitrate is found in many products.

Answer format: ending1/ending2/ending3/ending4