Marshmallow Root (Althaea officinalis)
Marshmallow root is a deeply soothing herb traditionally used to support digestive and respiratory health in horses. Naturally high in mucilage — a gel-like plant compound — it forms a protective coating along mucous membranes, helping to calm irritation and promote comfort.
 
This makes marshmallow root especially valuable for horses experiencing gastric sensitivity, seasonal respiratory irritation, or stress-related digestive upset.
 
Benefits
Coats and soothes the gastrointestinal lining
Supports horses prone to gastric ulcers or colitis
Helps ease digestive discomfort during times of stress
Acts as a demulcent to calm irritated airways
Supports normal mucus clearance in horses with coughs or environmental sensitivities
May assist in maintaining a balanced and healthy microbiome
 
Feeding Options
Mixed into damp daily feed (ideal for powdered form)
Prepared as a cold infusion (to preserve mucilage) and offered as part of a water buffet
Offered free-choice in small amounts for horses who self-select soothing herbs
 
Introduce gradually and observe your horse’s response.
 
Important Considerations
Because of its mucilage content, marshmallow root may reduce the absorption of oral medications. Feed at least 2–3 hours apart from medications.
Ensure correct plant identification — use Althaea officinalis (true marshmallow root), not other similarly named plants.
Best used as supportive care alongside appropriate veterinary guidance for chronic or severe conditions.
 
Marshmallow root offers a gentle, natural way to support internal comfort and resilience. As with all herbs, it is most effective when included in a comprehensive management plan that prioritizes forage, movement, stress reduction, and access to fresh water.