Benefits of Manuka Honey for Breast Cancer: Findings From Pre-clinical Research
Interest in the benefits of Manuka honey for breast cancer has grown rapidly following the publication of new preclinical research investigating how high-MGO Manuka honey interacts with breast cancer cells.
While Manuka honey is not a treatment and should never replace standard medical care, laboratory and animal studies suggest it may offer supportive, complementary value due to its antioxidant profile, influence on inflammatory pathways, and potential interaction with hormone-responsive cancer mechanisms.
This article integrates the latest preclinical findings, including the widely reported UCLA research, to explain what is currently known about the benefits of Manuka honey for breast cancer, where the evidence is promising, and where further research is needed.[1]
Understanding Manuka Honey and Its Bioactive Profile
Manuka honey is produced by bees that pollinate Leptospermum species native to Australia and New Zealand. Unlike conventional honey, Manuka honey contains naturally occurring bioactive compounds that have been the subject of increasing scientific interest.
What makes Manuka honey unique?
The defining marker of Manuka honey strength is methylglyoxal (MGO), a compound that develops naturally from dihydroxyacetone (DHA) found in Manuka nectar. MGO levels are used globally to indicate Manuka honey quality, purity and strength.
In addition to MGO, Manuka honey contains:
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Polyphenols and flavonoids with antioxidant activity
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Organic acids contributing to its low pH
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Prebiotic oligosaccharides that support beneficial gut bacteria
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Trace minerals and enzymes
These compounds underpin much of the scientific discussion around the benefits of Manuka honey for breast cancer, particularly in relation to oxidative stress, inflammation and cellular signalling.
Antioxidant and Anti-Inflammatory Support
Oxidative stress and chronic inflammation are widely recognised contributors to cancer development and to many treatment-related side effects. Chemotherapy, radiotherapy and the disease process itself can increase oxidative burden within the body.
Manuka honey has demonstrated a broad antioxidant profile in laboratory studies, with the capacity to neutralise free radicals and reduce oxidative damage.[2] From a supportive care perspective, antioxidant-rich foods may help:
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Reduce oxidative stress affecting healthy cells
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Support cellular resilience during treatment
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Complement a nutrient-dense, whole-food diet
Manuka honey has also shown anti-inflammatory activity in experimental models by influencing inflammatory mediators such as cytokines.[4] These properties are frequently referenced when discussing the benefits of Manuka honey for breast cancer, particularly in relation to comfort, recovery and overall wellbeing.
Latest Preclinical Evidence: Manuka Honey and ER-Positive Breast Cancer
The strongest recent interest in the benefits of Manuka honey for breast cancer comes from a 2024 preclinical study led by researchers at UCLA's Jonsson Comprehensive Cancer Center and published in Nutrients.[1]
Overview of the UCLA study
The research investigated the effects of orally administered Manuka honey in both breast cancer cell lines and mouse models. The study focused primarily on estrogen receptor (ER)-positive breast cancer, which accounts for approximately 70–80 percent of all breast cancer diagnoses.
Key findings included:
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Manuka honey inhibited proliferation of ER-positive MCF-7 breast cancer cells in a dose-dependent manner
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Weaker effects were observed in triple-negative MDA-MB-231 cells, suggesting hormone-receptor specificity
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Oral Manuka honey significantly reduced tumour growth in mouse models
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In one experiment, tumour growth was reduced by approximately 84 percent in established ER-positive tumours
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Healthy breast cells were not significantly harmed in the experimental models
These outcomes were reported without major toxicity in the animal models studied.
How Manuka Honey May Influence Cancer-Related Pathways
Beyond tumour size, the researchers also examined how Manuka honey interacted with processes inside cancer cells in laboratory and animal studies, helping to explain the growth changes seen in preclinical models.
In these early studies, Manuka honey appeared to:
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Encourage cancer cells to undergo apoptosis, a natural process often described as programmed cell death
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Influence internal cell pathways involved in cancer growth and survival, including AMPK, AKT/mTOR and STAT3 [3]
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Affect pathways linked to hormone signalling and reduced response to endocrine therapies, sometimes referred to as endocrine resistance
These cellular pathways play an important role in how cancer cells grow, survive and respond to treatment. Their involvement helps explain why researchers describe Manuka honey as a potential future nutraceutical or complementary approach, rather than a replacement for established breast cancer treatments.
Manuka Honey Alongside Conventional Breast Cancer Therapies
The UCLA study also explored how Manuka honey interacted with tamoxifen, a commonly prescribed endocrine therapy for ER-positive breast cancer.[1]
In the experimental setting, Manuka honey enhanced the growth-inhibiting effects of tamoxifen on ER-positive breast cancer cells. This is particularly relevant given the challenge of endocrine resistance, where cancers become less responsive to hormone therapy over time.
Researchers and commentators consistently emphasise that:
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These findings are preclinical only
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Manuka honey should not replace surgery, endocrine therapy, chemotherapy or radiotherapy
Gut Health, Immunity and Recovery Support
Beyond direct cancer-cell research, Manuka honey is also studied for its effects on gut health and immune function.[5] Cancer treatments can disrupt the gut microbiome, contributing to digestive discomfort and reduced immune resilience.
Manuka honey naturally contains prebiotic compounds that support beneficial gut bacteria, helping to:
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Maintain microbial balance
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Support gut barrier integrity
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Contribute to immune system regulation
Expert commentary highlights the potential role of Manuka honey in addressing treatment-related side effects.
As Peter Brooks, Lead Scientist for the USC Honey Research Lab, explains, “For chemotherapy and radiotherapy, Manuka honey is beneficial in boosting the immune system, decreasing nausea, and it also helps those ulcerations in the mouth and intestinal gut tract that are caused by chemo inflammation.”
This perspective aligns with ongoing scientific interest in Manuka honey’s nutritional profile and its potential role in supporting comfort, gut integrity and overall wellbeing during intensive cancer therapies.
Nutritional Support During Treatment
Breast cancer treatment can make eating well more difficult due to nausea, reduced appetite and changes in taste. During these periods, foods that are easy to tolerate and simple to include can play an important role in supporting overall intake.
As a natural food, Manuka honey provides readily available carbohydrates and may be easier to consume than more complex meals when appetite is low. Its mild sweetness and smooth texture can make it a practical option when maintaining energy intake becomes challenging. When used thoughtfully and alongside professional guidance, it may help support nutrition and quality of life during treatment.
Practical Ways to use Manuka Honey
When people choose to include Manuka honey during breast cancer treatment or recovery, it is typically used in small amounts as part of everyday food and drink. Common approaches include:
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Mixing into warm (not hot) water or herbal tea
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Adding to smoothies, yoghurt or soft foods
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Taking a small amount directly from the spoon if well tolerated
Important considerations
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Manuka honey is naturally high in sugars and should be used cautiously by individuals with diabetes or blood sugar concerns
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It should not replace medical treatment, prescribed nutrition support or dietary advice
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Always discuss the use of Manuka honey with your oncology care team before including it in your routine.
Context Notes
All evidence discussed in this article is derived from laboratory and animal studies. At present:
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No human clinical trials have confirmed Manuka honey as a breast cancer treatment
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Manuka honey should be viewed as a potential future adjunct, not a replacement for standard cancer care
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Anyone considering Manuka honey alongside treatment or recovery should consult their oncology team, particularly due to possible medication interactions and blood-sugar considerations.
Where Manuka Honey May Fit in Supportive Cancer Care
Scientific interest in the benefits of Manuka honey for breast cancer has been strengthened by recent preclinical research demonstrating slowed tumour growth in ER-positive breast cancer models and possible synergy with endocrine therapies. These findings highlight Manuka honey's rich bioactive profile and its ability to influence cancer-related pathways in experimental settings.
However, this research remains preliminary. Manuka honey is not a treatment for breast cancer and should only be considered as part of a broader, clinician-guided approach to nutrition and wellbeing. Human clinical trials are essential to determine whether these early findings translate into meaningful outcomes for patients.
Disclaimer: Statements made have not been evaluated by the TGA (Australian Therapeutic Goods Administration) or FDA (U.S. Food & Drug Administration). Products sold are not intended to diagnose, treat, cure, or prevent any disease. Manuka honey is not intended to be a substitute for other medicines or advice and is best used in conjunction with any existing treatment plans. Please consult your healthcare professional before beginning any treatment. For all of the science-backed and evidence-based information on the natural healing properties of medicinal-grade Manuka honey, please refer to the latest published Manuka Honey research and use at your own discretion.
Frequently Asked Questions
1. Is Manuka honey a treatment for breast cancer?
Manuka honey is not a treatment for breast cancer. Current research is still at an early stage and focuses on laboratory and animal studies. Some people are interested in Manuka honey as part of a broader wellbeing or nutrition approach, but any use should always be discussed with a healthcare professional.
2. Why are researchers interested in Manuka honey and breast cancer?
Researchers are studying Manuka honey because it contains naturally occurring compounds that are being explored in preclinical research. Early studies are helping scientists better understand how these compounds interact with cancer cells, particularly in estrogen receptor-positive breast cancer, but more research is needed.
3. Does the strength or MGO rating of Manuka honey matter?
Many research studies use Manuka honey with clearly defined MGO levels, as MGO is one way to measure Manuka honey’s natural bioactive profile. While defined MGO levels are useful in research, individual needs and contexts can vary, and higher MGO is not inherently necessary for every person.
4. Can Manuka honey be included during breast cancer treatment or recovery?
Some people choose to include Manuka honey as part of their diet during treatment or recovery, especially when appetite or taste changes make eating more difficult. Because everyone’s situation is different, it’s best to talk with an oncologist or healthcare provider before including Manuka honey, to make sure it fits safely within an individual care plan.
References
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Márquez-Garbán, D.C.; Yanes, C.D.; Llarena, G.; Elashoff, D.; Hamilton, N.; Hardy, M.; Wadehra, M.; McCloskey, S.A.; Pietras, R.J., Manuka Honey Inhibits Human Breast Cancer Progression in Preclinical Models, 2024, Nutrients, 16(14), 2369. Link: https://www.mdpi.com/2072-6643/16/14/2369
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Morar, I.I.; Pop, R.M.; Peitzner, E.; Ranga, F.; Orăsan, M.S.; Cecan, A.D.; Chera, E.I.; Bonci, T.I.; Usatiuc, L.O.; Țicolea, M.; But, A.E.; Cătoi, F.A.; Pârvu, A.E.; Dinu Ghergie, M.C., Phytochemical Composition and Antioxidant Activity of Manuka Honey and Ohia Lehua Honey, 2025, Nutrients, 17(2), Article 276. Link: https://pubmed.ncbi.nlm.nih.gov/39861404/
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Fernandez-Cabezudo, M.J.; El-Kharrag, R.; Torab, F.; Bashir, G.; George, J.A.; El-Taji, H.; Al-Ramadi, B.K., The IL-6/STAT3 Signaling Pathway Is an Early Target of Manuka Honey-Induced Suppression of Human Breast Cancer Cells, 2017, Frontiers in Oncology, 7, Article 167. Link: https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2017.00167/full
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Minden-Birkenmaier, B.A.; Meadows, M.B.; Cherukuri, K.; Smeltzer, M.P.; Smith, R.A.; Radic, M.Z.; Bowlin, G.L., The Effect of Manuka Honey on dHL-60 Cytokine, Chemokine, and Matrix-Degrading Enzyme Release under Inflammatory Conditions, 2019, Med One, 4(2), Article e190005. Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC6594701/
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Mohan, A.; Quek, S.-Y.; Gutierrez-Maddox, N.; Gao, Y.; Shu, Q., Effect of Honey in Improving the Gut Microbial Balance, 2017, Food Quality and Safety, 1(2), 107–115. Link: https://academic.oup.com/fqs/article/1/2/107/3860141
The statements on this website have not been evaluated by the Australian Therapeutic Goods Administration (TGA) or the U.S. Food & Drug Administration (FDA). Products sold by Biosota Organics are not intended to diagnose, treat, cure, or prevent any disease. Manuka honey is not a substitute for medical care or professional advice and is best considered as a complementary option alongside existing treatment plans. Always consult a qualified healthcare professional before making changes to your health routine. Where customer testimonials have been cited, please note that individual responses may vary.