im 15 year old male i way like 220 i wanna way 200 or less in 14 days

NO it can cause your blood sugar to drop. thus making you dizzy. sorry to say but time to find another diet for you. some people can handle it others cant (did you follow the complete book instructions? It's not just about eating only meat you need supplements and vitamins. you need leafy greens)

It can for the first week or so while your body is suffering carb withdrawal. After that you should feel fine, assuming you are doing it right.