Herbs are often promoted for bloating, indigestion, nausea, reflux, and irritable bowel symptoms. Some may provide symptom relief for certain people, but “natural” does not automatically mean proven or risk-free.
Digestive symptoms can have many causes, so persistent pain, bleeding, unexplained weight loss, ongoing vomiting, difficulty swallowing, fever, or significant changes in bowel habits should be assessed by a healthcare professional.
Ginger
Ginger is one of the better-studied herbs for nausea. Research suggests it may help nausea and vomiting during pregnancy, although evidence for other types of nausea is mixed. Ginger can also cause heartburn, abdominal discomfort, diarrhea, or mouth and throat irritation in some people.
People who take regular medicines should ask a clinician or pharmacist before using concentrated ginger supplements because herbal products can interact with medicines.
Licorice Root
Licorice is often marketed for digestive support, but high-quality evidence does not clearly show that licorice alone treats common digestive disorders. Regular licorice containing glycyrrhizin can raise blood pressure, lower potassium, and cause abnormal heart rhythms, especially with larger or long-term intake.
People with high blood pressure, heart or kidney disease, and pregnant people need particular caution. Deglycyrrhizinated licorice (DGL) removes most glycyrrhizin, but that does not prove it treats GERD, ulcers, or IBS.
Marshmallow Root and Slippery Elm
Marshmallow root and slippery elm contain mucilage and have a long history of traditional use for soothing irritated tissues. However, strong clinical evidence for treating GERD, inflammatory bowel disease, IBS, or “leaky gut” is limited.
Because these products can form a coating in the digestive tract, they may affect how other oral medicines are absorbed. Ask a pharmacist about timing if you use prescription medicine.
Digestive Bitters
Products containing gentian, dandelion, artichoke, or other bitter herbs are promoted to increase digestive secretions. Evidence for treating chronic bloating, fat malabsorption, reflux, or gallbladder disease is limited. People with gallstones, bile-duct disease, ulcers, or other gastrointestinal conditions should not self-treat with concentrated bitters without medical advice.
What About IBS?
For IBS, evidence-based care may include dietary changes, soluble fiber, selected medicines, probiotics in some cases, physical activity, sleep, and gut-directed psychological therapies. No single herb works for everyone.
Safer Ways to Use Herbal Products
- Do not use an herb as a replacement for prescribed treatment.
- Choose products with clear ingredient amounts and reputable third-party testing when possible.
- Avoid assuming that a traditional use proves clinical effectiveness.
- Tell your doctor or pharmacist about herbal supplements you use.
- Use extra caution during pregnancy, breastfeeding, and in children.
- Stop a product and seek medical advice if symptoms worsen or a reaction occurs.
Bottom Line
Some herbs may help selected digestive symptoms, but the evidence varies widely. Ginger has some of the better human evidence for nausea, while claims that marshmallow, slippery elm, licorice, or bitters heal the gut lining or treat chronic digestive disease are not well established. Use herbs as complementary options—not as substitutes for diagnosis or proven treatment.
Reliable Sources
- NCCIH: Ginger—Usefulness and Safety
- NCCIH: Licorice Root—Usefulness and Safety
- NIDDK: Treatment for Irritable Bowel Syndrome
This article is for general educational information and does not replace professional medical advice.