My body is weird

It’s been 6 weeks since I’ve started the eat clean program. At first I was livid, since I do love to eat. But after being fat and obese, I am happy to report that I am now just overweight 🤣🤣 (Baby steps I know). I just finally realised that what we eat just don’t disappear into the ether. Since according to the laws of physics that matter just doesn’t disappear but rather change into a different from. So by drinking 1 litre of water means I am actually transferring 1 kilograms of mass in my body (I am baffled 😁). Anyway, that means you are what you eat. I think I should start exercising more than usual since I am currently having a hard time going down below 80kgs