Worried about Loose Skin after Water Fast(?)

Hallo Everybody,

I want to attempt to do a 21 Day water fast.
I am 20 years old but the thing is that I am worried about having loose skin after my Water Fast because of the fast weight loss.

I currently weight 85kg - [187pounds].
I plan om fasting a eating raw food to my goal weight of 55kg - [121pounds].
I am 167cm tall..about 5'5".

Will I have excess skin after a fast? and is it in any way preventable????

PLEASE HELP!!!!!

-------------------------I will start my 21 day fast tomorrow if anybody care to join me.

if you want to correspond with me direct about how the fasting is going it would be even better!!!! please email me!!! Tweet