Mushroom

Chaga (Inonotus obliquus)

Also known as: Birch fungus, Inonotus obliquus, King of mushrooms

Evidence

Antioxidant-rich fungus from birch trees with immune-modulating and anti-inflammatory properties.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

Antioxidant
Immune support
Anti-inflammatory
Gut health

How it works

Extremely high antioxidant content (ORAC)
Beta-glucans modulate immunity
Betulinic acid from birch host
Supports gut microbiome

Dosage

Typical range: 1-3g extract or 2-6g powder daily
Timing: Morning or afternoon
With food: Either way
Duration: Long-term use traditional
Special populations: Those seeking antioxidant and immune support

Forms

Hot water extract
Dual extract
Chunks for tea
Powder

Safety

Common side effects

Rare, well tolerated

Contraindications

Kidney disease
Oxalate kidney stones
Bleeding disorders

Products containing Chaga (Inonotus obliquus)

Top-scoring supplements in our catalog that list Chaga (Inonotus obliquus) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Evidence notes

Traditional use with emerging research

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.