Research review
Does ashwagandha help with GI disease? What the research does and doesn't show
No human trial has tested ashwagandha against IBS, ulcerative colitis or any other diagnosed GI disease. A 2025 review names ashwagandha among several plants with preclinical (not clinical) research for inflammatory bowel disease, and separately, digestive upset is one of the more commonly reported side effects in ashwagandha's own human trials.
No human trial has tested ashwagandha against IBS, ulcerative colitis, or any other diagnosed digestive disease. A 2025 review names ashwagandha among several plants with preclinical, not clinical, research for inflammatory bowel disease. Separately, mild digestive discomfort is one of the side effects reported — infrequently — in ashwagandha's own human safety trials, which points the opposite direction from a settling effect.
What the evidence doesn't support
It doesn't support ashwagandha, in tea, capsule, or extract form, as a treatment for irritable bowel syndrome (IBS), ulcerative colitis, Crohn's disease, or any other diagnosed digestive condition. It doesn't support a claim that ashwagandha "calms," "heals," or "protects" the gut in someone with one of these diagnoses — no trial has tested that. What exists is a short mention in a broader review of plants studied preclinically for inflammatory bowel disease, and evidence from ashwagandha's own safety trials that digestive upset is, if anything, a reported side effect rather than a benefit.
What the trials found
A 2025 review of emerging natural therapies for inflammatory bowel disease lists several plants the authors describe as showing "promising activity" against IBD in the literature they surveyed, including Cannabis sativa, Aloe vera, Boswellia serrata, Withania somnifera (ashwagandha), and turmeric, among others. The review doesn't give an ashwagandha-specific dose, study design, or outcome — it names ashwagandha as one plant on a longer list — and its own authors are explicit that these plants "need to be further investigated in terms of preclinical and clinical studies to obtain the safety and efficacy data necessary" before any of them could be used therapeutically. That's a call for more research, not a report that the research already exists.
Separately, a 2026 systematic review pooled 23 randomized trials (2,317 participants total) of standardized ashwagandha root extract in healthy adults, at doses of 125-600 mg/day for periods up to 180 days. It found ashwagandha generally well tolerated, with no serious adverse events attributed to it. Mild gastrointestinal discomfort was among the side effects reported, alongside headache and transient drowsiness — though infrequently, and about as often in the placebo groups as the ashwagandha groups. That review used a standardized extract at doses below what a typical root-powder capsule provides, and it wasn't designed to test any digestive disease outcome — it's evidence about tolerability, not about treating a GI condition.
Questions people ask
Is ashwagandha good for IBS?
There's no trial to answer that. No study has given people with IBS ashwagandha, in any dose or form, and measured their symptoms. The one relevant review names ashwagandha only as part of a broader, preclinical list for a different (though related) condition, inflammatory bowel disease.
Does ashwagandha help with ulcerative colitis?
A 2025 review lists ashwagandha among several plants studied preclinically for inflammatory bowel disease, which includes ulcerative colitis, but gives no ashwagandha-specific human data, dose, or outcome. Its own authors say more research, including clinical trials, is needed before any of these plants could be considered a therapeutic option.
Can ashwagandha upset your stomach?
Digestive discomfort is one of the mild side effects reported in ashwagandha's safety research, though a 2026 review found it infrequent and about as common in placebo groups. See does ashwagandha cause diarrhea? for more on this specific side effect.
When to talk to a doctor
IBS, ulcerative colitis, Crohn's disease and other digestive diagnoses need medical evaluation — persistent abdominal pain, blood in stool, or unexplained changes in bowel habits are reasons to see a doctor, not to self-treat with a supplement. Ashwagandha is not a treatment for any of these conditions, and nothing in the research above supports using it as a substitute for diagnosis or the care a gastroenterologist recommends. If you take medication for a digestive condition, or are pregnant or nursing, talk to a doctor before adding any supplement.
Related reading: does ashwagandha cause diarrhea?, ashwagandha side effects, and who should not take ashwagandha.
Sources
- Emerging Natural Therapies for the Treatment of Inflammatory Bowel Disease A 2025 review lists ashwagandha among several plants with reported preclinical activity against inflammatory bowel disease, but gives no ashwagandha-specific dose or study detail, and its own authors say more preclinical and clinical research is needed before any of these plants can be used therapeutically.
- Back to the Roots: Safety and Tolerability of Standardised Ashwagandha (Withania somnifera) Root Extract in Healthy Adults-A Systematic Review of Biomarkers and Adverse Events A 2026 review of 23 trials (2,317 people) found standardized ashwagandha root extract at 125-600 mg/day was generally well tolerated, with mild gastrointestinal discomfort, headache and drowsiness reported infrequently and about as often in placebo groups.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.