All you need for doing this test is a teaspoon and a plastic bag. Try it and check if everything is OK with your respiratory system, intestines, hormones, metabolism, kidneys and teeth.
For doing this test all you have to do is take the spoon and rub your tongue with it. Try to scrub a small deposit from the surface of the tongue. While doing this remember that you to take a sample (deposit) that is closer to your throat.
Then, wrap the spoon in a plastic bag and leave it to stand like that for about 60 seconds under a strong lighting. The strong light from the bulb helps the growth of bacteria, so the stronger the bulb is, the result will be more visible.
In healthy humans, the deposits will be clean. However, if there are too many, strange colors and odor, it can be an early sign of problems with lungs or airways, liver, kidneys, intestines or hormones.
If you get this result, you might want to visit a doctor and examine what wrong with you.
Also, this test can help you detect whether you have bad breath, which people often are not aware of.
If what you feel is a fruity fragrance, it may indicate to ketoacidosis or metabolic disorder, which can cause even diabetes. If you experience an unpleasant odor reminiscent of ammonia, it is possible that you have problems with your kidneys.
However, do not immediately panic – unpleasant breath does not always have to be a sign of diseases of internal organs. In fact, usually it is related with tonsils or gum problems, or due to a decay and bad teeth.