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Botanical

Marshmallow

Also known as: Althaea officinalis, Marshmallow, Althea, Marshmallow Root Extract

C
Evidence

Marshmallow root is a traditional herbal remedy rich in mucilage polysaccharides that may support respiratory and digestive tract health by forming a protective coating. Limited modern clinical evidence exists, though traditional use and preliminary in vitro studies suggest potential demulcent 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

  • GI soothing
  • GERD
  • Dry cough
  • Mucous membrane support
  • Respiratory support
  • Cough relief
  • Sore throat soothing
  • Digestive tract protection

How it works

  • Creates mucilage coating
  • Protects irritated tissues
  • Soothes entire GI tract
  • Traditional for dry cough

Dosage

Typical range
2-5g dried root as cold infusion, or 500-1500mg capsules daily
Timing
Away from meals and medications
With food
Away from food for coating effect
Duration
As needed, generally safe long-term
Special populations
GERD, IBD, throat irritation

Forms

  • Cold infusion
  • Capsules
  • Powder
  • Powder extract· 70/100
  • Dried root· 70/100
  • Tea/decoction· 70/100
  • Tincture· 70/100

Safety

Common side effects

  • May slow medication absorption

Contraindications

  • None significant

Products containing Marshmallow

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

Thorne
GI Relief
88
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Evidence notes

Traditional demulcent, limited clinical research

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

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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.