How come i lost weight so easily?!

How come i lost weight so easily?

over the last few days ive been veryyy healthy and doing lots of cardio, and i lost 1.5kgs (im currently about 53kgs, 163cm tall, 19 years old)

im just wondering how come the weight came off so easily? it took only 3 days to lose 1.5kgs...i know its not that healthy to lose weight this fast, but still.... is this actual fat lost or is it water weight or...?

thanks

at your age its fine to loose weight because you are active.that might be fat lost and it depends do you take regular walks ? that can be one of the reasons if the answer is yes .i don't think if there is any reason to be alarmed.