Marshmallow Leaf

Latin Name
Althaea officinalis

Herb Class/Action
• Demulcent
• Emollient
• Anti-inflammatory
• Vulnerary
• Mild diuretic
• Soothing expectorant

Parts Used
• Leaf (dried or fresh)

Flavors
• Mildly sweet
• Mucilaginous

Energetics
• Cooling
• Moistening

Traditional Benefits
Marshmallow has been revered since antiquity for its soothing and healing nature. Both the root and leaf have been used in traditional European, Middle Eastern, and Native American herbal systems. The leaf is specifically used for its mucilage content, which calms inflamed tissues, especially in the respiratory and urinary systems. Traditionally, it was prepared as a tea, poultice, or syrup to soothe dry coughs, irritated throats, urinary tract inflammation, and wounds. The name Althaea is derived from the Greek word althainein, meaning “to heal.”

A Natural Allergy Ally
Its cooling and moistening mucilage calms irritated mucous membranes and may reduce reactivity in conditions involving dry, inflamed sinuses or allergic rhinitis.

A Herb for Seasonal Support
Especially valuable during hot, dry weather or seasons marked by respiratory irritation. Marshmallow leaf helps cool internal heat, soothe throat dryness, and calm spasmodic coughs.

How It Works
Marshmallow leaf contains high levels of mucilage—gel-like polysaccharides that coat and protect mucous membranes. This mucilage reduces inflammation, relieves irritation, and supports tissue repair. It also contains flavonoids, phenolic acids, and antioxidant compounds that support immune function and reduce oxidative stress. Its gentle diuretic action makes it helpful for flushing the urinary tract.

Best Ways to Use It
Tinctures/Extracts: 2–4 mL of a 1:5 tincture, 2–3x daily for throat, gut, or urinary tract irritation.
Herbal Teas: Use as a cold infusion—steep 1–2 tsp leaf in cool water for 4–6 hours to extract mucilage. Sip throughout the day.
Topical Poultices: Applied to minor burns, scrapes, or dry, inflamed skin. Combine with calendula or comfrey for enhanced effect.
Steam Inhalations: Can be added to steaming water to soothe irritated lungs.

Fun Fact
The original marshmallow candy was made from the mucilage of Althaea officinalis root, whipped with honey and egg whites—a far cry from today’s sugary treats!

A Herb for Modern Use
Marshmallow leaf remains a gentle go-to herb for herbalists addressing dry, irritated tissues—especially in the throat, bronchi, bladder, and gut. It is frequently used in formulas for smokers’ cough, dry hacking coughs, and UTIs. Its mucilage content makes it excellent for hydrating tissues in those prone to dryness from medications, aging, or heat exposure. It is also used in modern skincare for hydrating and calming irritated or inflamed skin.

Key Constituents
• Mucilage polysaccharides (including glucans and arabinogalactans)
• Flavonoids (kaempferol, quercetin)
• Phenolic acids (ferulic, syringic)
• Tannins
• Pectins
• Minerals (calcium, magnesium, zinc)

Safety Considerations
Generally regarded as very safe, even for children and the elderly. Best taken away from prescription medications, as its mucilage can slow absorption. Always use cold infusions for maximum mucilage extraction. Not known to be contraindicated in pregnancy.