The "munchies" are the most reliable effect in the entire pharmacology, using them therapeutically is harder.
CB1 activation in the hypothalamus increases hunger and food reward. Of every effect cannabis is claimed to have, appetite stimulation is among the most consistent and best understood.
THC & appetite via CB1, PubMed ↗The approval dates to 1992 and rests on controlled trial data showing improved appetite and stabilized weight. It remains a licensed indication, a real therapeutic foothold, not marketing.
Dronabinol & AIDS wasting, PubMed ↗Trials in advanced cancer show patients may feel hungrier, yet weight, muscle mass and survival do not improve meaningfully. Cachexia is driven by tumor metabolism, not just low intake, fixing the hunger signal does not fix the disease.
Cannabinoids & cancer cachexia, PubMed ↗THC-driven hunger preferentially boosts craving for palatable, energy-dense food. As a side effect it is benign for most; as a daily pattern it shapes diet quality in the wrong direction.
Cannabis use & diet quality, PubMed ↗Cannabis is not an approved treatment for appetite in most jurisdictions, and nothing here recommends using it. If appetite affects your life, bring this research, literally, these sources, to a physician and decide together. Laws differ by country and state; check CannabisLaws.ai before anything else.
Is it legal where you live? Tell us your city to see the law status and minimum age.
Status for all 64 jurisdictions on CannabisLaws. Not legal advice.