Psyllium (Plantago ovata) vs Slippery Elm (Ulmus rubra)

Psyllium (Plantago ovata)

Slippery Elm (Ulmus rubra)

About

Psyllium, also known as flea seed due to its small brown appearance, is produced by several Plantago species. It has long been used as a laxative, and MedlinePlus lists it as a bulk-forming laxative used to treat constipation. The seeds and husks have a bland taste and develop a jellylike consistency when moistened due to their high mucilage content. The plants are extensively cultivated, especially in India, and propagated from seed in spring. Seeds are harvested when ripe in late summer and early autumn.

Slippery elm (Ulmus rubra) is a large tree native to the eastern U.S. and Canada. The medicinal part is the inner bark, prized for its high mucilage content. When soaked in water, it turns “slippery”; this mucilage is traditionally used to soothe the throat and digestive tract, and MSK says slippery elm may help relieve minor cough or sore throat, but there is no evidence it can treat infections or other serious medical conditions.

Safety & precautions

Do not exceed the stated dose. Always take with plenty of water. Avoid psyllium in cases of bowel obstruction or perforation, and ask a professional before giving it to children or using it in pregnancy. It can cause constipation when a person is dehydrated. Ensure adequate hydration when using.

Sustainability: Slippery elm is at risk from overharvesting; marshmallow root is a more sustainable alternative.

Safety text above is printed in full and is never abbreviated. For each plant’s complete precautions, drug and food interactions and preparation notes, open its own page - both are free.