text: do meal replacement shakes really help you to loose weight? ok. i'm 5'5'' and i weigh about 123-25 everyone says i'm skinny as hell and i wear my weight well. anyways do you think i'm fat. i'm 18. i want to start drinking those soy meal replacement shakes. just for the hell of it. i mean they are so freaking good. do they really work though? you’re not fat and you don’t look fat.  the only thing a shake meal replacement ever helped me lose was the ability to feel full.