Supplement Scholar
Mushroom

Chaga

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Chaga. Birch-tree mushroom rich in melanin, betulin, and antioxidants.

How it works. Polysaccharides and triterpenes; high ORAC antioxidant capacity.

What the research supports. 1 graded claims. Strongest: In vitro & animal data robust; clinical data limited (limited).

How much to take. Typical dose: 1–3 g dual extract.

Side effects and interactions. 2 medication interactions listed. Serious: Oxalate-related kidney concerns at high chronic doses.

Stacking. Pairs well with Vitamin D3 + K2, Zinc, NAD+ precursor (NMN or NR). Avoid combining with Kidney stones.

Common forms. Available as Dual-extracted powder.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Chaga. Anecdotes are not medical advice.

Chaga. Birch-tree mushroom rich in melanin, betulin, and antioxidants.

Key compound: betulinic acidC30H48O3 · 456.7 g/mol

What it is

Birch-tree mushroom rich in melanin, betulin, and antioxidants.

Also called

Inonotus obliquus

Food sources

Inonotus obliquus

Goals

Immune FunctionHealthy Aging

How it works

Polysaccharides and triterpenes; high ORAC antioxidant capacity.

Pathways

  • Antioxidant
  • Immune modulation

Effects

  • +Antioxidant capacity supports

What the research supports

In vitro & animal data robust; clinical data limitedlimited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
1–3 g dual extract
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEither with or without food.
Best formMost evidence is based on the dual-extracted powder form.
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Side effects & interactions

Serious

  • Oxalate-related kidney concerns at high chronic doses

Medication interactions

Anticoagulantsmoderate

Antiplatelet effects.

Antidiabeticsminor

Additive.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Vitamin D3 + K2Foundational immune modulation.
  • ZincRequired cofactor for innate and adaptive immune function.
  • NAD+ precursor (NMN or NR)Complementary mitochondrial and sirtuin support.

Avoid combining

  • Kidney stonesHigh oxalate.

Common forms

  • Dual-extracted powder

Key studies

8 studies cited in total.

PubMed: Chaga — In vitro & animal data robust; clinical data limited ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Chaga and "In vitro & animal data robust; clinical data limited". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Chaga — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Chaga and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Chaga — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Chaga and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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