The liver is a very important part of the body, without it, you would possibly, if not surely be very ill all the time. It is responsible for cleaning the blood and removing any dead blood cells from the blood stream. Over time your liver can get toxic and can cause it to not work as well as it once could in the past, trust me you will know it when it happens. You might ask why, and the answer to that is, blood, if your blood is toxic then you are toxic. The blood is a key component for everything in your body, without good blood nothing will reap the benefits of it, causing you to feel the outcome, like diseases and sicknesses. Pollution in the air and maybe even some of the foods you eat right now can cause this, fortunately the liver can come back and regenerate itself but only if you give it the things it needs.
So what you want to do is give it foods and herbs that can help cleanse all the nasty out. Things like dandelion root and licorice can do some good. These two herbs help with digestion and can be natural laxatives, they will be a help during the detox process and speed things up. Drink plenty of water, not drinking enough as most people know can dehydrate you, dehydration causes the kidneys to work harder, the kidneys are responsible for cleaning the blood so if they can't then the liver has to, stressing the liver further. A good number of foods help the liver also like garlic, grapefruit, green tea, and your green foods like kale, spinach, lettuce, collards and so on.
Some ways to know if your liver is under pressure, observe how many times a day you excrete waste, if you are not doing that enough then you aren't digesting well and your liver isn't doing so hot either. If you have nightmares or trouble sleeping those are also signs. One thing people get confused with is pain under your right rib, most people confuse it with a cramp but it could be your liver otherwise. Acne and hair breakage can also be some red flags, but even if you are filling good at times, always remember to make it a routine to detox to help prevent things and keep you steady.