Last updated: October 2026
There’s no good evidence that CBD helps you lose weight. Some trials found CBD reduced appetite, but mostly in people taking very high prescription doses, often 30 times or more what a typical supplement provides. At everyday amounts, CBD isn’t a weight-loss product. Diet, activity, sleep and, where suitable, NHS treatment are what work.
Below, we look at what the research actually shows, why the “CBD burns fat” headlines come from lab studies, how CBD differs from THC and THCV, and where CBD might reasonably fit into a healthy routine.
What the research shows
| Type of study | What it found | What it means for you |
|---|---|---|
| Systematic review of 11 human trials (2022) | Most reported less appetite and/or lower body weight with CBD; some found no change and one found more appetite | Mostly in epilepsy and other clinical trials at very high doses; the authors flagged risk of bias |
| Type 2 diabetes trial (UK, 2016) | 62 adults took CBD 100mg twice a day, THCV, a combination or placebo for 13 weeks. CBD alone didn’t significantly change glucose or the other main measures compared with placebo | No sign of a meaningful metabolic effect, even at 200mg a day |
| Prescription CBD (Epidyolex) | Decreased appetite and weight loss are listed as common side effects | Doses are 5 to 20mg per kg of body weight a day, so hundreds of mg or more |
| Lab cell studies | CBD promoted “browning” of fat cells in a dish | Interesting biology, but not evidence that it works in people |
| Cannabis user surveys | Cannabis users don’t tend to weigh more, despite the “munchies” | These studies are mostly about cannabis with THC, not CBD supplements, and can’t show cause and effect |
Put simply, the appetite effect seen in trials appears at doses far above what’s in a food supplement, and as a side effect rather than a goal. There are no good-quality trials showing that CBD supplements help healthy adults lose weight.
Does CBD reduce or increase appetite?
Neither, for most people at supplement doses. CBD doesn’t give you the “munchies”: that’s THC, which activates CB1 receptors in the brain that drive hunger. CBD works differently and doesn’t activate CB1 in the same way. See what is the endocannabinoid system?
At high prescription doses, reduced appetite is a known side effect, which is why it shows up in trials. A few people notice small changes in appetite at lower doses, in either direction, but this isn’t reliable or predictable.
Does CBD burn fat or boost metabolism?
Not in any way that’s been shown in people. Claims that CBD “turns white fat into brown fat” come from a 2016 study on mouse fat cells grown in a dish. Cell studies are a starting point for research, not proof that a supplement changes your body. No human trial has shown CBD increases calorie burn or fat loss.
CBD vs THC vs THCV and weight
| Cannabinoid | Effect on appetite | UK status |
|---|---|---|
| CBD | Little effect at supplement doses; may reduce appetite at high doses | Legal as a food supplement |
| THC | Increases appetite (the “munchies”) | Controlled drug |
| THCV | Studied for appetite and blood sugar; early research only | Complicated; see what is THCV? |
A medicine that blocked CB1 receptors, rimonabant, was licensed for weight loss in Europe but suspended in 2008 because of serious psychiatric side effects. It’s a reminder that tinkering with appetite through this system isn’t simple.
Is there a “best CBD oil for weight loss”?
No. Any brand selling a CBD oil “for weight loss” is making a claim the evidence doesn’t support, and in the UK, weight-loss claims for food supplements are tightly restricted. If you want a CBD oil for general wellbeing, choose one that’s broad spectrum, batch tested by an independent lab and linked to the FSA public list. See how to choose a CBD oil in the UK.
Where CBD might fit in
Weight management is about habits you can keep up, and sleep and stress matter more than many people realise. NHS guidance links poor sleep with weight gain, and stress often drives comfort eating. Many people use CBD as part of a calm evening routine, alongside better sleep habits. See CBD for sleep. That’s a supporting role in your routine, not a fat-loss effect.
If you’d like to try CBD, start low, around 10mg a day. The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication. See how much CBD to take and CBD side effects.
CBD with weight-loss injections
If you’re on Mounjaro (tirzepatide) or Wegovy (semaglutide), speak to your prescriber or pharmacist before adding CBD or any supplement. CBD can interact with some medicines, and these injections already reduce appetite, so you need to keep eating enough protein and nutrients. See can CBD interact with medication?, can’t sleep on Mounjaro? and magnesium and Mounjaro.
What actually works for weight loss
- A modest calorie deficit you can stick to. The NHS suggests aiming to lose 0.5 to 1kg a week.
- Mostly whole foods: plenty of vegetables, fibre and protein, fewer sugary drinks and ultra-processed snacks.
- Moving more: the NHS recommends at least 150 minutes of moderate activity a week, plus strength work twice a week.
- Sleep and stress: a regular bedtime and wind-down routine.
- Support: the free NHS Weight Loss Plan app, your GP, or local weight management services. Your GP can also tell you whether medical treatment is suitable.
Magnesium is another supplement often linked with weight loss. It doesn’t burn fat either, but it contributes to normal energy-yielding metabolism. See magnesium for weight loss.
FAQs
Does CBD help you lose weight?
There’s no good evidence it does. Trials that found reduced appetite used very high prescription doses. CBD supplements aren’t a weight-loss product.
Does CBD make you hungry?
No. The munchies come from THC. CBD doesn’t stimulate appetite in the same way, and at very high doses it can reduce appetite.
Can CBD make you gain weight?
Weight gain isn’t a common effect of CBD. A few people notice small appetite changes either way, but this isn’t common at supplement doses.
What is the best CBD oil for weight loss?
There isn’t one. No CBD oil has been shown to cause weight loss. If you use CBD, choose a lab-tested broad spectrum oil from a brand on the FSA public list.
Can I take CBD with Mounjaro or Wegovy?
Check with your prescriber or pharmacist first. CBD can interact with some medicines, and weight-loss injections already reduce appetite.
Does CBD speed up metabolism?
Not as far as human research shows. Claims about fat browning come from cell studies, not people.
Sources
- Pinto JS, Martel F. Effects of cannabidiol on appetite and body weight: a systematic review. Clin Drug Investig, 2022.
- Jadoon KA et al. Efficacy and safety of cannabidiol and tetrahydrocannabivarin on glycemic and lipid parameters in patients with type 2 diabetes. Diabetes Care, 2016.
- Parray HA, Yun JW. Cannabidiol promotes browning in 3T3-L1 adipocytes. Mol Cell Biochem, 2016.
- Goodpaster KPS. Cannabis, weight, and weight-related behaviors. Curr Obes Rep, 2025.
- emc. Epidyolex 100mg/ml oral solution: summary of product characteristics.
- NHS. Obesity: treatment.
- NHS Better Health. Lose weight.
