Slippery elm (Ulmus rubra)

Tier 3 — weak evidence · Gut · GERD · Sore throat

A soothing bark that coats and protects irritated digestive and throat surfaces. Traditional use for acid reflux, IBS, and sore throat spans centuries. No human trials exist, and all evidence is based on historical use and theoretical support. Generally well tolerated. Take 2 hours away from medications because it may slow their absorption.

Dose: 400–800 mg/day or 1–2 tbsp bark powder in water; take 2 hrs away from medications (may impair absorption)