Acne-causing bacteria are becoming highly resistant to common antibiotics, with 93% of one bacterial type resisting erythromycin, according to a 2026 study of 135 acne patients. Researchers found that reishi mushroom extract killed both types of acne bacteria in laboratory tests and computer modeling suggests it could overcome the bacteria’s resistance mechanisms. While these results are promising, the mushroom extract has only been tested in dishes, not on human skin, so more research is needed before it becomes a standard acne treatment.
A new study of 135 acne patients found that bacteria causing acne are becoming resistant to common antibiotics like erythromycin and amoxicillin. Researchers discovered that an extract from reishi mushrooms (Ganoderma lucidum) can kill these bacteria and may even help overcome their antibiotic resistance. The mushroom extract worked in lab tests against both types of acne-causing bacteria, and computer modeling suggests it could block the bacteria’s defense mechanisms. This research offers hope for a natural alternative treatment as antibiotic resistance becomes a growing problem in acne care.
Key Statistics
A 2026 study of 135 acne patients found that 93.3% of Staphylococcus aureus bacteria resisted erythromycin, a commonly prescribed acne antibiotic, while 86.7% of Staphylococcus epidermidis resisted amoxicillin.
Reishi mushroom extract showed dose-dependent antibacterial activity against both acne-causing bacteria types in laboratory tests, with computer modeling predicting that specific mushroom compounds could bind to and disable the bacteria’s resistance proteins.
In the same 2026 study, gentamicin and rifampin demonstrated 100% effectiveness against both acne bacteria types, suggesting these antibiotics remain viable options as resistance to other drugs increases.
The Quick Take
- What they studied: Whether bacteria that cause acne are becoming resistant to antibiotics, and whether reishi mushroom extract could kill these resistant bacteria.
- Who participated: 135 volunteers with acne lesions. Researchers collected samples and identified two types of acne-causing bacteria: Staphylococcus aureus and Staphylococcus epidermidis.
- Key finding: Most acne bacteria showed high resistance to common antibiotics (93% of one type resisted erythromycin), but reishi mushroom extract killed both bacteria types effectively in lab tests.
- What it means for you: If further testing confirms these results in humans, reishi mushroom extract could become a natural treatment option for acne that doesn’t rely on antibiotics. This matters because antibiotic resistance is making acne harder to treat. However, more research is needed before this becomes a standard treatment.
The Research Details
Researchers collected acne samples from 135 volunteers and identified the bacteria present using laboratory tests. They then tested how well common antibiotics worked against these bacteria to see which drugs the bacteria could resist. Next, they tested reishi mushroom extract on the bacteria in petri dishes to see if it could kill them. Finally, they used computer modeling to predict how the mushroom’s active compounds might work against the bacteria’s resistance mechanisms.
The computer analysis was particularly interesting. Researchers used molecular docking, a technique that simulates how molecules fit together like puzzle pieces, to predict which parts of the mushroom extract would interact with the bacteria’s resistance proteins. They also analyzed whether the mushroom compounds would be safe and effective if taken as medicine using ADMET profiling, which predicts how the body would process these compounds.
This research approach combines real-world bacteria samples with laboratory testing and computer prediction. This multi-layered approach is important because it shows promise at multiple levels: the mushroom extract actually kills the bacteria in dishes, and the computer models suggest it could work against the bacteria’s resistance mechanisms. This combination makes the findings more credible than if researchers had only done one type of test.
The study used 135 samples, which is a reasonable size for this type of research. The bacteria were confirmed using biochemical tests, which is a standard, reliable method. The antibiotic resistance testing followed established protocols. The computer modeling predictions are promising but need human testing to confirm. The study was published in a peer-reviewed journal, meaning other scientists reviewed it before publication. However, all results so far are from laboratory tests, not from treating actual patients.
What the Results Show
The study found that acne-causing bacteria are increasingly resistant to common antibiotics. Erythromycin resistance was extremely high: 93.3% of Staphylococcus aureus and 60% of Staphylococcus epidermidis resisted this antibiotic. Amoxicillin resistance was also very high, especially in S. epidermidis at 86.7%. In contrast, gentamicin and rifampin showed 100% effectiveness against both bacteria types, meaning the bacteria had not developed resistance to these drugs.
The reishi mushroom extract showed strong antibacterial activity against both bacteria types in a dose-dependent manner, meaning higher concentrations of the extract killed more bacteria. The computer modeling revealed that specific compounds in the mushroom extract (lucidenic acid D1, ganoderlactone B, and ganoderlactone E) could bind to and potentially disable the bacteria’s resistance proteins. This suggests the mushroom extract might work through multiple mechanisms to fight the bacteria.
The study identified several risk factors associated with acne bacteria: age, gender, body mass index (BMI), oily skin, family history of acne, diet, and psychological stress. These findings align with what dermatologists already know about acne causes. The ADMET analysis predicted that the mushroom compounds would have favorable pharmacokinetics, meaning the body could absorb and process them effectively, with low toxicity concerns.
Gram Research analysis shows this study builds on growing evidence that antibiotic resistance in acne-causing bacteria is a real problem. Previous research has documented increasing resistance to erythromycin and other antibiotics. This study adds to that body of evidence and introduces reishi mushroom as a potential solution. The use of computer modeling to predict how natural compounds might overcome resistance is a newer approach gaining traction in antimicrobial research.
This study only tested the mushroom extract in laboratory dishes, not in human skin or in living organisms. The bacteria samples came from only 135 volunteers, which may not represent all acne patients worldwide. The computer predictions about how the mushroom compounds work are theoretical and need laboratory confirmation. The study did not test whether the mushroom extract would be safe or effective when applied to skin or taken as a medicine. Additionally, the study did not compare the mushroom extract directly to other natural treatments or to standard acne medications.
The Bottom Line
Based on this research, reishi mushroom extract shows promise as a potential acne treatment, but it is not yet ready for clinical use. The evidence is strong for laboratory effectiveness but weak for human use. People with acne should continue using proven treatments prescribed by dermatologists. Those interested in natural alternatives should discuss reishi mushroom with their doctor before trying it, as more human testing is needed. Confidence level: Low for clinical use, but moderate for further research.
This research matters most to dermatologists, acne patients struggling with antibiotic-resistant bacteria, and people interested in natural alternatives to antibiotics. It should concern anyone taking antibiotics for acne, as resistance is becoming more common. It may be particularly relevant for people who have experienced treatment failure with standard antibiotics. People with mild acne or those responding well to current treatments may not need to change their approach yet.
If reishi mushroom extract moves forward in research, human testing would likely take several years. Even if successful in clinical trials, it would take additional time for regulatory approval and availability as a treatment. Realistic timeline for potential availability as a medical treatment: 5 to 10 years minimum.
Frequently Asked Questions
Is reishi mushroom extract effective for treating acne?
Reishi mushroom extract killed acne bacteria in laboratory tests and showed promise in computer modeling, but it has not been tested on human skin yet. More research is needed before it can be recommended as an acne treatment.
Why are acne antibiotics becoming less effective?
Bacteria develop resistance when exposed to antibiotics over time. The 2026 study found that 93% of one acne bacteria type now resists erythromycin, likely due to widespread antibiotic use in acne treatment over many years.
What antibiotics still work against acne bacteria?
According to the 2026 study, gentamicin and rifampin showed 100% effectiveness against both acne bacteria types tested, making them reliable options as resistance to other antibiotics increases.
Can I buy reishi mushroom extract for acne now?
Reishi mushroom supplements are available commercially, but this study only tested the extract in laboratory dishes, not on human skin. Talk to a dermatologist before using it for acne, as safety and effectiveness in humans remain unproven.
What factors make acne bacteria worse?
The 2026 study identified age, gender, BMI, oily skin, family history, diet, and psychological stress as risk factors associated with acne bacteria. Managing stress and diet may help reduce acne severity.
Want to Apply This Research?
- Track acne lesion count and severity weekly using photos and a simple 1-10 scale. If using any acne treatment, note the specific product, application frequency, and any side effects. This creates a baseline for comparing treatments over time.
- Users could log daily factors associated with acne in the app: stress level, diet quality, sleep hours, and skin care routine. The app could then help identify personal acne triggers and track whether reducing those triggers improves skin. This supports the study’s finding that stress, diet, and other factors influence acne bacteria.
- Set up monthly check-ins to photograph acne lesions in consistent lighting and location. Track which treatments were used that month and rate overall skin improvement. Over 3 to 6 months, patterns will emerge showing which approaches work best for that individual. Share this data with a dermatologist to inform treatment decisions.
This research describes laboratory findings only and has not been tested in humans. Reishi mushroom extract is not currently approved by the FDA as an acne treatment. Do not replace prescribed acne medications with mushroom supplements without consulting a dermatologist. If you have acne, work with a healthcare provider to develop a treatment plan based on proven therapies. Anyone considering natural supplements should discuss potential interactions with their medications and existing health conditions with their doctor.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.