NutriDex

The Supplement Research Compendium
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CBG (Cannabigerol)

Non-intoxicating hemp cannabinoid promoted for calm and gut health.

Preliminary evidence 🌙Sleep & Mood🛡️Gut & Immune

✚ Updated · How we grade evidence

Evidence tier
Preliminary
Research weight
Citations
8 verified / 8
Classification
Sleep & Mood
❝
What the evidence says. Graded preliminary: only two small human RCTs exist. One single-dose trial showed acute anxiety reduction, but the only sleep RCT was negative, and the touted gut and antibacterial benefits rest entirely on mouse and lab studies. (Preliminary evidence: Early or small human trials; promising but not yet conclusive.)

What is CBG (Cannabigerol)?

CBG (Cannabigerol) is a sleep and mood supplement used for acute anxiety & stress relief. NutriDex grades the human evidence as Preliminary. CBG is the non-intoxicating 'mother cannabinoid' from which THC and CBD are formed in the hemp plant. Human evidence is very early. In a 2024 double-blind crossover trial (n=34), a single 20 mg dose modestly reduced subjective anxiety (about a 27% drop) and acute stress with no intoxication or impairment, and slightly improved verbal memory. However, a 2024 randomized trial in 63 veterans found 25–50 mg/day did not improve sleep better than placebo. Widely marketed claims for inflammatory bowel disease, pain and infection come only from animal and test-tube work: CBG eases chemically induced colitis in mice and is a potent antibacterial against MRSA in the lab. No long-term human safety or efficacy data exist, and products are largely unregulated, so potency and purity vary.

Purported Benefits

✓Acute anxiety & stress relief
✓Calm without intoxication
✓Gut anti-inflammatory (preclinical)
✓Antibacterial (preclinical)

Evidence by outcome

The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.

OutcomeEvidenceEffectStudies
Acute anxiety & stressSingle 20 mg dose in one n=34 crossover trial cut anxiety ~27%; no replication yet. Preliminary ↑ benefit · moderate 1
Sleep25-50 mg/day for 4 weeks did not beat placebo in 63 veterans. Preliminary — no effect · negligible 1
Gut inflammation (colitis)Benefit shown only in mouse colitis models; no human data exist. No Evidence ↑ benefit 2
Antibacterial (MRSA)Potent against MRSA in vitro and in mice only; entirely preclinical. No Evidence ↑ benefit 1

Dosing & Compounds

Typical Dose
Most human data use 20–50 mg/day of oral hemp-derived CBG tincture; no established therapeutic dose.
Active Compounds
Cannabigerol (CBG)

Safety & Cautions

Short human trials report good tolerability; reported effects are mild and may include dry mouth, sleepiness or low blood pressure. CBG inhibits liver CYP enzymes in vitro, so it may raise levels of drugs metabolized that way and could add to the effect of sedatives or blood-pressure-lowering medicines. Avoid in pregnancy and breastfeeding due to absent safety data, and note that unregulated hemp products vary widely in CBG content and can contain THC. Educational only — always check with your doctor or pharmacist before combining CBG (Cannabigerol) with any medicine.

Key Studies

RCT Cuttler 2024 ✓ PubMed
Single 20 mg CBG cut subjective anxiety ~27% and acute stress vs placebo, no intoxication or impairment; verbal memory improved (n=34).
RCT Veterans ECS21 2024 ✓ PubMed
25–50 mg/day CBG for 4 weeks did not improve sleep vs placebo (n=63); well tolerated but no efficacy signal.
Review Henderson 2024 ✓ PubMed
High-CBG hemp extract reduced DSS colitis severity and remodeled the gut microbiome in mice; no human data.
Review Nachnani 2024 ✓ Full text
Comprehensive review concludes CBG shows broad preclinical promise but human trial evidence remains minimal.
Review Farha 2020 ✓ Full text
CBG was the most potent antibacterial cannabinoid, killing MRSA and biofilms in vitro and treating systemic MRSA infection in mice.
Review Robinson 2021 ✓ PubMed
Acute CBG did not disrupt fear memory or stress-induced anxiety in mice, suggesting limited use for PTSD/stress anxiety.
Review Nachnani 2021 ✓ Full text
Review: CBG acts at CB1/CB2, alpha-2 adrenoceptors and 5-HT1A; therapeutic case rests largely on preclinical data.
Review Borrelli 2013 ✓ PubMed
CBG attenuated DNBS-induced colitis in mice, lowering myeloperoxidase, iNOS and ROS; reduced colon damage (animal model).
8 sources cited · 8 verified Search all studies on PubMed ↗

Common questions about CBG (Cannabigerol)

What is CBG (Cannabigerol) used for?

CBG (Cannabigerol) is most often taken for Acute anxiety & stress relief, Calm without intoxication, Gut anti-inflammatory (preclinical), Antibacterial (preclinical). Non-intoxicating hemp cannabinoid promoted for calm and gut health.

Does CBG (Cannabigerol) work — what does the evidence say?

Preliminary evidence. Early or small human trials; promising but not yet conclusive. CBG is the non-intoxicating 'mother cannabinoid' from which THC and CBD are formed in the hemp plant. Human evidence is very early. In a 2024 double-blind crossover trial (n=34), a single 20 mg dose modestly reduced subjective anxiety (about a 27% drop) and acute stress with no intoxication or impairment, and slightly improved verbal memory. However, a 2024 randomized trial in 63 veterans found 25–50 mg/day did not improve sleep better than placebo. Widely marketed claims for inflammatory bowel disease, pain and infection come only from animal and test-tube work: CBG eases chemically induced colitis in mice and is a potent antibacterial against MRSA in the lab. No long-term human safety or efficacy data exist, and products are largely unregulated, so potency and purity vary.

What is the typical dose of CBG (Cannabigerol)?

Most human data use 20–50 mg/day of oral hemp-derived CBG tincture; no established therapeutic dose.

Is CBG (Cannabigerol) safe? Any cautions or side effects?

Short human trials report good tolerability; reported effects are mild and may include dry mouth, sleepiness or low blood pressure. CBG inhibits liver CYP enzymes in vitro, so it may raise levels of drugs metabolized that way and could add to the effect of sedatives or blood-pressure-lowering medicines. Avoid in pregnancy and breastfeeding due to absent safety data, and note that unregulated hemp products vary widely in CBG content and can contain THC.

How many studies support CBG (Cannabigerol)?

NutriDex cites 8 sources for CBG (Cannabigerol), graded "Preliminary".

Cite this page
APA

Peh, D. (2026). CBG (Cannabigerol): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 26 Jun 2026, from https://nutridex.info/s/cbg

BibTeX
@misc{nutridex_cbg,
  author       = {Peh, Daryl},
  title        = {CBG (Cannabigerol): Benefits, Dosage, Side Effects \& Evidence},
  year         = {2026},
  howpublished = {NutriDex --- The Supplement Research Compendium},
  url          = {https://nutridex.info/s/cbg},
  note         = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

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