Humulene, terpene found in some weed strains (and also other plants like hops and ginger), has some evidence of being an appetite suppressant.

When I first went through the process of getting my medical card, I was required to have a consultation with the pharmacist and she recommended strains with that if I have a problem with the munchies. Personally, I really like to get high and eat so I’ve mostly avoided those strains, so I cannot attest to the effectiveness of this myself.