All your achievement will depend upon what you are aiming for, you will achieve what you are thinking or what you want to achieve. Crash diet could be very effective if you need to lose weight in few days to look attractive on the event upcoming. The implementation of crash dieting is hard as it restricts the calorie intake and it is very Monotone. 

It can be dangerous and if you talk about instant lose weight then crash diet side effects are also there. You are preventing your body from having valuable calories and healthy nutrition, it means you are not only lost weight in short time but you are putting extra stress on your body as well. It will weakens your thinking capacity as well, you may get patient of anxiety.

There are most of the people who achieve the level of insanity by taking crash diet to a new level. Yes we are talking about tapeworm, people purposely infect themselves with it to lose weight. What is the point of being slim, staying alive is more important thing than being slim. Don’t do such things which can cost your life, if you want to adopt crash dieting then crash diet side effects are also there for you.