Birch Polypore
Also known as: Piptoporus betulinus, Razor Strop Fungus, Birch Bracket, Birch Conk
Effective Dosage
No established dose (insufficient research data)
What the Science Says
Birch Polypore is a bracket fungus that grows on birch trees and has been used in folk medicine for thousands of years. Lab studies suggest extracts may reduce the viability of colorectal cancer cells in a test tube, and animal studies show it does not appear to cause harmful cardiovascular effects at tested doses. However, all research to date is either in cell cultures or rodents — no human clinical trials exist to confirm any health benefit.
What It Doesn't Do
No proven cancer-fighting effect in humans — the lab results are very early-stage. No evidence it boosts immunity, fights infection, or improves any measurable health outcome in people. Don't confuse ancient use with proven modern medicine.
Evidence-Based Benefits
Birch Polypore is a bracket fungus that grows on birch trees and has been used in folk medicine for thousands of years. Lab studies suggest extracts may reduce the viability of colorectal cancer cells in a test tube, and animal studies show it does not appear to cause harmful cardiovascular effects at tested doses. However, all research to date is either in cell cultures or rodents — no human clinical trials exist to confirm any health benefit.
Weak EvidenceEffective at: No established dose (insufficient research data)
Source: auto-research
Absorption & Bioavailability
Unknown — no human pharmacokinetic or absorption data exists in the provided studies
Red Flags to Watch For
- Zero human clinical trials — all evidence comes from animal and cell-culture studies
- 193 supplement products on the market despite no established effective dose or proven human benefit
- Cytotoxicity (cell-killing effects) observed at high concentrations even in normal colon cells — safety margin in humans is unknown
- Marketing often overstates ancient use as proof of efficacy, which is not scientific evidence
Products Containing Birch Polypore
See how Birch Polypore is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-09