Yes There will be great side effects. You are fourteen years old. Do not eat. I ate it.

Then it will cause hair loss. Insomnia

If you want to lose weight. It's like I haven't eaten for a month. Drink juice. Drink water. Eat fruit.

I am 1.64. Weight: 46 kg. Now I have lost twenty pounds.

But I advise you not to go on a diet. You'll be devastated.