I have years of experience with fasting. Mainly due to being anorexic but regardless it still has the same effects on everyone. Fasting has its benefits but it also has some hazards...
-You will be malnutritioned and you will have Dry Skin and Hair, Brittle Hair and Nails, Hair Loss
-Insomnia - You will have problems falling and/or staying asleep.
-You will think about food ALL day and when you do finally eat you will binge on unhealthy foods and overeat.
-You will experience side effects of fatigue, malaise, aches and pains, emotional duress, acne, dizziness, headaches, allergies, swelling, vomiting, bad breath, and symptoms of colds and flu.
-You will have extremely low energy levels and tierd all the time
-Blacking out is common when fasting
-When you do finally eat EVERYTHING will immediately turn to fat
But if you are going to fast still please read up on it. There are many hazards to it. Ad when coming off a fast it is very important how to get back into eating so your digestive system can function properly.
Take Care!