# CBD Increases Food Intake in Controlled Human Trial

> **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637)
> **Publisher:** CED Clinic (https://cedclinic.com)
> **Canonical URL:** https://cedclinic.com/cbd-appetite-regulation-increased-food-intake-study/
> **Published:** 2026-05-22T17:20:35-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T10:05:52-04:00
> **Clinical Summary:** Explore how CBD appetite regulation influences energy intake with new clinical trial evidence showing increased food consumption despite lower hunger hormone levels.

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CED Clinical Relevance #7 High Direct Clinical Relevance This controlled human trial directly challenges common assumptions about CBD’s appetite effects and has immediate implications for patient counseling about weight changes.
Clinical Insight | CED Clinic This study flips the script on CBD appetite assumptions, but findings in healthy volunteers may not translate to patients with cachexia or appetite disorders. The mechanism remains unclear and warrants caution before clinical extrapolation.
Cannabidiol (CBD) Appetite Regulation Energy Intake Ghrelin Signaling Metabolic Effects

Audience
Cannabis Clinicians, Patients Using CBD, Researchers

Primary Topic
CBD Effects on Appetite and Energy Balance

Source
[Read the full article](https://doi.org/10.1016/j.appet.2026.108531)

Table of Contents

- [CBD Increased Food Intake in Healthy Adults Despite Lower Ghrelin Levels](#CBD_Increased_Food_Intake_in_Healthy_Adults_Despite_Lower_Ghrelin_Levels)
- [Frequently Asked Questions](#Frequently_Asked_Questions)[Does CBD increase or decrease appetite?](#Does_CBD_increase_or_decrease_appetite)
- [Why did participants eat more despite lower ghrelin levels?](#Why_did_participants_eat_more_despite_lower_ghrelin_levels)
- [Should patients using CBD for other conditions worry about weight gain?](#Should_patients_using_CBD_for_other_conditions_worry_about_weight_gain)
- [How does this compare to THC’s well-known appetite effects?](#How_does_this_compare_to_THCs_well-known_appetite_effects)
- [What dose of CBD was used in this study?](#What_dose_of_CBD_was_used_in_this_study)
- [Could CBD be useful for treating appetite loss or cachexia?](#Could_CBD_be_useful_for_treating_appetite_loss_or_cachexia)
- [Did CBD affect metabolism or how the body processes food?](#Did_CBD_affect_metabolism_or_how_the_body_processes_food)
- [Why did participants not report feeling hungrier if they ate more?](#Why_did_participants_not_report_feeling_hungrier_if_they_ate_more)
- [Related](#Related)

## CBD Increased Food Intake in Healthy Adults Despite Lower Ghrelin Levels

A controlled human trial reveals that cannabidiol significantly increased energy intake at lunch by nearly 200 calories while paradoxically suppressing the hunger hormone ghrelin, challenging common assumptions about CBD’s appetite-dampening effects and raising questions about alternative appetite pathways.

What This Study Teaches Us

This double-blind crossover trial provides the first human evidence that acute CBD administration increases actual food consumption, not just subjective hunger. The finding contradicts rodent data showing appetite suppression. The study’s major limitation is the small sample size (15 participants) and single-dose design, which cannot establish dose-response relationships or long-term effects.

Why This Matters
[Cannabis medicine](https://cedclinic.com/essential-oils-industrial-hemp-antimicrobial-benefits/) discussions often frame CBD as an appetite suppressant, contrasted with THC’s well-known hunger-inducing effects. These findings challenge that narrative and have direct clinical implications for patients using [CBD products](https://cedclinic.com/fda-warning-on-cbd-products/) who report unexpected weight changes or increased appetite. The disconnect between actual eating behavior and both subjective hunger and ghrelin signaling suggests alternative appetite-regulation pathways that warrant investigation. Understanding these mechanisms matters for both patient counseling and targeted therapeutic applications in conditions affecting appetite and body weight.

Study Snapshot

Study Type
Randomized, double-blind, placebo-controlled crossover trial

Population
Fifteen healthy adults (11 males, 4 females), mean age 25 years, mean BMI 24.3 kg/m²

Exposure or Intervention
Single oral dose of 298 mg CBD isolate

Comparator
Matched placebo

Primary Outcomes
Ad libitum energy intake at lunch 180 minutes post-dose; postprandial glucose and lipid metabolism

Sample Size or Scope
N=15 participants in crossover design

Journal
Appetite

Year
2026

DOI
10.1016/j.appet.2026.108531

Funding or Conflicts
National Centre for Sport and Exercise Medicine, Loughborough University; NIHR Leicester Biomedical Research Centre

Clinical Bottom Line
A single 298 mg dose of CBD increased lunch energy intake by approximately 200 kilocalories in healthy adults, despite lower circulating ghrelin and unchanged subjective hunger ratings. This controlled trial contradicts animal models and common clinical assumptions that CBD suppresses appetite.

What This Paper Looked At
Researchers tested whether acute CBD ingestion affects energy intake, subjective appetite, or postprandial glucose and lipid metabolism in healthy adults. Participants consumed either CBD or placebo, ate a standardized breakfast 30 minutes later, and had blood drawn hourly for metabolic and hormonal analysis. At 180 minutes post-dose, participants were offered an ad libitum pasta lunch and instructed to eat until comfortably full. The primary outcome was total caloric consumption at that meal.

What the Paper Found

Participants consumed 193 kilocalories more at lunch after CBD ingestion compared to placebo (979 kcal vs 786 kcal, p=0.003), representing a 25% increase in energy intake. The effect size was large (Cohen’s d=0.94). Ghrelin concentrations were significantly lower following CBD at both 120 and 180 minutes, and the minimum ghrelin level and area under the curve were also reduced compared to placebo. Despite this biochemical signal for reduced hunger, there were no differences in subjective appetite ratings (hunger, fullness, desire to eat) between conditions. Postprandial glucose, triglycerides, non-esterified fatty acids, insulin, GLP-1, energy expenditure, and substrate oxidation rates were all similar between CBD and placebo conditions.

How Strong Is This Evidence?

This is a well-designed randomized controlled crossover trial with appropriate blinding, standardized conditions, and objective measurement of food intake. The crossover design strengthens internal validity by using participants as their own controls. The effect is robust (large effect size, statistically significant). However, the small sample size (N=15), homogeneity of the population (mostly young, healthy males), and single-dose acute design limit external validity and prevent assessment of dose-response relationships or longer-term effects.

Where This Paper Deserves Skepticism

The study tested only a single dose on a single day in each condition. We do not know whether this effect persists with repeated dosing, whether tolerance develops, or what the dose-response curve looks like. The population was young, healthy, and predominantly male. These findings may not generalize to older adults, those with metabolic disease, patients with appetite disorders, or clinical populations using CBD therapeutically. The mechanism remains unknown. The researchers offer no explanation for why CBD would increase eating while simultaneously lowering ghrelin and not affecting subjective hunger. The meal was self-selected pasta, and food preferences or macronutrient-specific effects were not assessed. Finally, the study did not measure CBD plasma concentrations, so we cannot confirm bioavailability or relate blood levels to effects.

What This Paper Does Not Show

This study does not demonstrate that CBD causes weight gain over time, that these effects persist with chronic dosing, or that CBD is orexigenic in clinical populations such as patients with cachexia, cancer-related anorexia, or eating disorders. It does not identify the mechanism by which CBD influenced food intake independently of ghrelin or subjective hunger. It does not establish whether different doses, formulations, or routes of administration would produce similar effects. The study does not compare CBD to THC or other cannabinoids, nor does it assess effects on food choice, macronutrient preference, or eating behavior beyond total caloric intake at a single meal.

How This Fits With the Broader Clinical Conversation
This finding directly contradicts rodent data showing CBD reduces food intake and body weight. It also challenges a common clinical narrative positioning CBD as an appetite suppressant, often marketed for weight loss. However, the finding aligns with observational reports from some CBD users who describe increased appetite or weight gain. The disconnect between ghrelin suppression and increased eating suggests CBD may influence appetite through pathways independent of the classic ghrelin-NPY axis, potentially involving reward circuitry, hedonic eating, or endocannabinoid modulation of feeding behavior. The field needs mechanistic studies and larger [clinical trials](https://cedclinic.com/endocannabinoid-system-emotional-memory-ptsd-treatment/) in diverse populations before drawing definitive conclusions about CBD’s appetite effects. Clinicians should remain open to the possibility that CBD’s effects on appetite may be bidirectional, context-dependent, or population-specific.

Dr. Caplan’s Take
*This paper stops me in my tracks because it directly challenges a clinical talking point I have repeated hundreds of times: that CBD suppresses appetite while THC stimulates it. The data here are clean, the design is solid, and the effect is large. What makes this particularly interesting is the paradox at its core. People ate more, but their hunger hormone went down and they did not report feeling hungrier. That disconnect tells us we do not understand the mechanism, and it suggests CBD’s appetite effects operate through pathways we have not mapped yet.*
*Clinically, this matters because patients sometimes report weight changes on CBD that surprise them, and this gives us a framework to discuss those observations without dismissing them. But I am cautious about over-interpreting a single-dose study in 15 healthy young adults. We do not know if this effect persists, whether it occurs in patients with disease, or whether it scales with dose. What I will take from this into practice is humility about our certainty regarding CBD’s appetite effects and openness to bidirectional or context-dependent outcomes. I will ask patients using CBD about appetite and weight more carefully, and I will stop framing CBD as categorically appetite-suppressing until we have more data.*

What a Careful Reader Should Take Away
This well-executed trial provides the first human evidence that acute CBD administration can increase food consumption, challenging assumptions derived from animal models. The magnitude of the effect is clinically meaningful (200 kilocalories represents 10-25% of typical lunch intake), and the paradoxical suppression of ghrelin alongside increased eating reveals gaps in our mechanistic understanding. However, the small sample size, single-dose design, and healthy population limit generalizability. Clinicians should incorporate these findings into patient counseling about CBD’s potential effects on appetite and weight, acknowledging uncertainty and monitoring individual responses rather than applying categorical predictions. Future research must address dose-response relationships, chronic effects, clinical populations, and the underlying mechanisms driving this unexpected orexigenic signal.

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📰 Source: [A single dose of cannabidiol increases ad libitum energy intake in healthy adults but does not affect postprandial glucose or lipid metabolism](https://doi.org/10.1016/j.appet.2026.108531)

## Frequently Asked Questions

### Does CBD increase or decrease appetite?

The answer appears more complex than previously thought. This controlled trial in healthy adults showed CBD increased food intake by about 200 calories at a single meal, contradicting animal studies showing appetite suppression. However, we do not yet know whether this effect persists with repeated use, varies by dose, or occurs in all populations. Clinical observations suggest CBD’s appetite effects may be bidirectional or context-dependent. More research is needed before making definitive claims.

### Why did participants eat more despite lower ghrelin levels?

This is one of the study’s most intriguing mysteries. Ghrelin is known as the hunger hormone and typically stimulates appetite when elevated. CBD suppressed ghrelin but increased eating, suggesting alternative appetite pathways are at play. Possibilities include effects on reward circuitry, hedonic eating behavior, endocannabinoid signaling independent of ghrelin, or metabolic signals we have not yet identified. The mechanism remains unknown and warrants further investigation.

### Should patients using CBD for other conditions worry about weight gain?

Not necessarily. This study measured a single meal after a single dose in healthy volunteers. We do not know whether repeated CBD use leads to sustained increased caloric intake or actual weight gain over time. Many patients use CBD chronically without reporting weight changes. However, clinicians and patients should monitor appetite and weight when starting CBD, particularly at higher doses, and adjust treatment if unwanted changes occur. Individual responses vary considerably.

### How does this compare to THC’s well-known appetite effects?

THC reliably increases appetite through CB1 receptor activation, producing subjective hunger and increased food intake. This study did not compare CBD directly to THC, so we cannot make definitive statements about relative magnitude or mechanisms. However, the fact that CBD increased eating without increasing subjective hunger suggests different pathways may be involved. THC’s appetite effects are mediated by CB1 receptors in hypothalamic circuits, whereas CBD has low affinity for CB1 and may act through alternative mechanisms.

### What dose of CBD was used in this study?

Participants received 298 mg of CBD isolate as a single oral dose. This is a moderate to high dose compared to typical [CBD products](https://cedclinic.com/fda-warning-on-cbd-products/) marketed for wellness (which often contain 10-50 mg per dose), but within the range used in some [clinical trials](https://cedclinic.com/endocannabinoid-system-emotional-memory-ptsd-treatment/) for therapeutic indications. We do not know whether lower doses would produce similar effects or whether a dose-response relationship exists. The study did not measure CBD blood levels, so we cannot relate plasma concentrations to outcomes.

### Could CBD be useful for treating appetite loss or cachexia?

This study raises the possibility but does not establish clinical utility. The trial enrolled healthy young adults, not patients with appetite disorders, cancer-related cachexia, or wasting syndromes. Effects in disease states may differ substantially from effects in healthy populations. Additionally, a single-meal increase in caloric intake does not guarantee sustained nutritional benefit or weight gain over time. Controlled trials in relevant patient populations would be needed to determine whether CBD has therapeutic value for [appetite stimulation](https://cedclinic.com/dronabinol-hiv-wasting-syndrome-appetite-weight-gain/).

### Did CBD affect metabolism or how the body processes food?

No. The study found no differences between CBD and placebo in postprandial glucose, triglycerides, insulin, GLP-1, energy expenditure, or rates of carbohydrate and fat oxidation. CBD increased the amount of food consumed but did not alter how the body metabolized that food. This suggests the effect is on appetite regulation or eating behavior rather than metabolic processing.

### Why did participants not report feeling hungrier if they ate more?

This is another unresolved question from the study. Subjective hunger ratings (measured by visual analog scales assessing hunger, fullness, and desire to eat) did not differ between CBD and placebo conditions, yet participants consumed significantly more calories after CBD. This disconnect between subjective experience and actual eating behavior suggests CBD may influence food intake through pathways that bypass conscious hunger perception, potentially involving reward, palatability, satiety signaling, or other mechanisms not captured by standard appetite questionnaires.

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### Related

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### Verification & Medical Governance

- **Lead Clinical Author:** Benjamin Caplan, MD
- **Credentials:** Board Certified in Family Medicine (ABFM), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House).
- **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`).
- **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/).
- **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637).
- **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).