Diet pills or weight loss tips!

Sa
Looking for some diet tips! Just want a flatter tummy! And I know that your tummy is 75% of what you eat! I'm a vet tech so I work a lot! So does anyone know of any diet pills that actually work? I've used Garcia cambogia before & it didn't really help! I'm 23 & weigh about 118-120! Just trying flatten my tummy & feel a little better! :) thanks guys!