There are many kinds of diet nowadays, but the craziest I’ve heard of is activated charcoal body cleanse and detox. I’m not saying that this is actually the craziest among all the diets available to the public, but this answer is based on my own opinion. In this kind of diet, a person will only drink juice that contains activated charcoal to your regular diet.
The reasoning behind this diet is that the body allegedly could not absorb activated charcoal, so it directly passes untouched through the digestive system. Since the activated charcoal clings on to toxins in the body, it then removes any unhealthy stuff commonly found in processed foods. While it is true that activated charcoal removes toxins out of your body, it also means that it can suck out the nutrients found in the intestine.