A cleanse won't detox your body -- but here's what will | Body Stuff with Dr. Jen Gunter

The liver is about the size of an American football and weighs three pounds. It does many jobs to keep our bodies running, from helping the immune system to creating proteins for blood clotting. 

The liver also deals with harmful substances, almost like a factory. It takes nutrients from the food and drinks we consume and breaks them down to be packaged in a usable way while removing the waste in the bile or via the kidneys, usually in the form of urine.

A popular cleanse is the cayenne pepper and lemon juice drink to "help your liver flush toxins." 

You drink it, and it gets digested. Nutrients get absorbed in the blood and arrive at the liver. But the liver processes these nutrients the same as everything else. It packages what's useful and disseminates it throughout the body. What it can't use becomes waste. So there's nothing exceptional about mixing cayenne and lemon. It doesn't "clean the pipes."

You might lose a few pounds at best because you aren't eating much. At worst, you could go into starvation mode.

The best things you can do:

• Don't smoke
• Eat a balanced diet
• Exercise regularly
• Get enough sleep
• Don't consume too much alcohol as it can cause problems over time, such as fatty liver disease, cirrhosis of the liver or liver cancer.
• Some medications can damage your liver.
• Be careful with supplements and herbs.