Cannabis for Appetite: The Short Answer

Cannabis can increase appetite. The main compound responsible is THC (tetrahydrocannabinol). THC binds to CB1 receptors in the brain and gut. This triggers hunger signals. The effect is often called the munchies. The FDA approved a synthetic THC pill, dronabinol, to treat appetite loss in AIDS patients.

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How THC Increases Appetite

THC activates CB1 receptors in the hypothalamus. The hypothalamus controls hunger. A 2014 study in Nature Neuroscience found THC also acts on CB1 receptors in the olfactory bulb. This makes food smells more intense. Mice ate more when they smelled food. The same mechanism may work in humans.

Cannabis for Appetite: A Comprehensive Medical Study Buying Guide

THC also affects ghrelin, a hormone that stimulates appetite. Some studies show THC raises ghrelin levels. Other studies show no change. The evidence is mixed.

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Medical Use for Appetite Loss

Dronabinol (Marinol) is FDA-approved for anorexia associated with weight loss in patients with AIDS. The typical dose is 2.5 mg twice per day, before lunch and dinner. The maximum dose is 20 mg per day.

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For cancer patients, evidence is weaker. A 2016 review by the American Society of Clinical Oncology found insufficient evidence that cannabis stimulates appetite in cancer patients. Cannabis may help nausea and vomiting from chemotherapy. That can improve appetite.

CBD and Appetite

CBD (cannabidiol) does not increase appetite. CBD is a negative allosteric modulator of CB1 receptors. It may reduce appetite. No FDA-approved CBD product treats appetite loss.

Dosing and Onset

Start with a low dose. For oral THC, 1 to 2 mg is a starting dose. For inhaled cannabis, 1 to 2 puffs. Inhaled effects start in minutes. Oral effects start in 30 to 90 minutes. Inhaled effects last 2 to 4 hours. Oral effects last 4 to 8 hours.

Wait 2 hours after oral use before taking more. Taking too much THC can cause anxiety, paranoia, and rapid heart rate.

Side Effects and Risks

THC can impair driving and operating machinery. Do not drive after use.

Strains for Appetite

No clinical trials compare cannabis strains for appetite. High THC content matters more than strain name. THCV (tetrahydrocannabivarin) may suppress appetite. Avoid products with high THCV if you want to eat.

Legal Status

Cannabis is illegal under federal law. It is Schedule I. Dronabinol is Schedule III. Nabilone is Schedule II. State laws vary. Check your state.