Lemon Balm for Weight Loss
Evidence Rating
Evidence Rating
None
No credible evidence, or actively debunked
No human clinical trials exist for lemon balm and weight loss. One 2025 mouse study showed reduced weight gain on a high-fat diet, but this has not been tested in humans. Lemon balm has genuine evidence for anxiety and sleep, which may indirectly support weight management.
Lemon Balm Key Facts
No human evidence
Zero human clinical trials exist for lemon balm and weight loss. A 2025 mouse study showed reduced weight gain, but animal results frequently do not translate to humans.
Anxiety and sleep improvement
Meta-analysis of 5 RCTs (302 patients) found significant improvements in anxiety (SMD -0.98) and depression (SMD -0.47). This is lemon balm's genuine, evidence-based benefit.
Very safe
Excellent safety profile at 300-1,600 mg/day. Rare mild side effects include drowsiness and GI upset. Theoretical interaction with sedatives and thyroid medications. Avoid in pregnancy.
Yes, OTC
Multiple AUST L listed products from Wanderlust, Nature's Sunshine, and other brands. Available at Chemist Warehouse and health food stores.
$15-40 per month
Capsules/extract supplements: $15-40/month. Lemon balm tea: significantly less ($5-15/month).
No
Available over the counter as an AUST L listed complementary medicine.
How Lemon Balm Claims to Work
Animal studies suggest lemon balm extracts may activate PPAR-alpha (fat metabolism), increase brown fat thermogenesis, and suppress fat cell development. These mechanisms are scientifically plausible but have only been demonstrated in mice, not humans.
What the Research Shows
Mouse study - lemon balm extracts on high-fat diet
200 mg/kg/day lemon balm extracts reduced weight gain from 51.9% to 27.7-29.7% vs controls in mice on a high-fat diet. Water extract suppressed fat cell differentiation; ethanol extract increased brown fat thermogenesis. No human studies followed.
Animal study (mice)
Lipid profile meta-analysis
5 RCTs with 302 patients: significant decreases in triglycerides, total cholesterol, and LDL cholesterol. Not a weight loss outcome, but suggests metabolic benefits.
Peer-reviewed journal
302 patients across 5 RCTs
Anxiety and depression meta-analysis
Significant improvement in anxiety (SMD -0.98) and depression (SMD -0.47) vs placebo. This is lemon balm's strongest area of evidence.
Source data from published peer-reviewed studies. Links open in a new tab to external medical databases.
Side Effects & Risks
Common (rare)
- Drowsiness
- Mild GI upset
- Headache (uncommon)
Cautions
- Theoretical interaction with sedative medications (may enhance drowsiness)
- Theoretical interaction with thyroid medications
- Avoid in pregnancy (insufficient safety data)
Australian Regulatory Status
Frequently Asked Questions
Other Supplements Reviewed
Berberine for weight loss
Evidence: Moderate | $35-75/mo
Apple Cider Vinegar for weight loss
Evidence: Weak | $3-25/mo
Protein Powder for weight loss
Evidence: Strong | $30-90/mo
Weight Loss Patches for weight loss
Evidence: None | $10-50/mo
Natural Appetite Suppressants for weight loss
Evidence: Moderate | $10-40/mo
Peptides for Weight Loss for weight loss
Evidence: Weak | $150-450/mo
Pink Salt (Himalayan Salt) for weight loss
Evidence: None | $1-5/mo
Medical disclaimer: This website is for informational purposes only. We are not medical professionals and nothing on this page constitutes medical advice, diagnosis, or treatment. Supplements are not a substitute for evidence-based medical treatment. Always consult a qualified doctor, pharmacist, or accredited practising dietitian before starting any supplement.
Supplements listed as AUST L on the Australian Register of Therapeutic Goods have been assessed by the TGA for safety and quality only, not for efficacy. An AUST L listing does not mean the TGA has verified that a supplement works for weight loss.
Data sourced from PubMed, Cochrane, TGA ARTG, FSANZ, and published clinical trial data. Last reviewed April 2026.