Oh it does give appetite suppression gave it immediately for me and. I'm coming from tzt, 6mg, and I can tell you right now do not listen to all these people saying you will be so hungry lol. Maybe what made the difference for me was that I stopped the tzt for almost a month and then started reta. So the effects of the tzt were gone and the reta kicked in immediately for me. The appetite suppression imo it provides is wayyy more superior bc you can actually eat and enjoy the food but control how much and it gives you energy to burn it off. It makes you full quick too.