Jalapeños Do Not Cause Diverticulitis
No, jalapeño peppers do not cause diverticulitis, and patients should not be advised to avoid them. This longstanding dietary myth has been thoroughly debunked by current evidence and guidelines.
The Evidence Against Food Restrictions
The most authoritative guidance comes from the 2021 AGA Clinical Practice Update 1, which explicitly states that nut, corn, and popcorn consumption is not associated with an increased risk of diverticulitis. Similarly, consuming fruits with small seeds (strawberries and blueberries) shows no association with diverticulitis risk 1. The 2015 AGA guidelines reinforced this, recommending against routinely advising patients to avoid nuts and popcorn 2.
While jalapeños aren't specifically mentioned in these guidelines, the principle is clear: small, hard food particles—including seeds, nuts, and by extension, jalapeño seeds—do not increase diverticulitis risk. The observational data on nuts and popcorn showed modest relative risks ranging from 0.55–1.13 with confidence intervals crossing 1.0, meaning no meaningful association exists 2.
Recent research further supports this: a 2025 systematic review of over two million person-years found that nut consumption was actually protective or neutral (HR 0.89,95% CI 0.71-1.12), with dose-response modeling showing a 5% risk reduction per additional weekly serving 3. Another 2025 prospective cohort study of nearly 30,000 women confirmed that intake of peanuts, nuts, seeds, and fresh fruits with edible seeds showed no association with incident diverticulitis 4.
What Actually Matters for Diverticulitis Risk
Instead of worrying about jalapeños, focus counseling on evidence-based risk factors 1:
Protective Factors:
- High-quality diet: High in fiber from fruits, vegetables, whole grains, and legumes; low in red meat and sweets
- Regular vigorous physical activity
- Maintaining normal BMI (avoiding obesity, especially central obesity)
- Not smoking
- Avoiding heavy alcohol use (alcoholism increases risk, but moderate consumption does not)
Risk-Increasing Factors:
- NSAIDs: Non-aspirin NSAIDs should be avoided when possible 2
- Obesity and weight gain
- Smoking
- Opiate analgesics and corticosteroids
Genetic Component:
Importantly, 40-50% of diverticulitis risk is genetic 1, meaning dietary modifications have inherent limitations.
Direct Evidence on Spicy Foods
A 1988 randomized crossover trial directly tested this question by having subjects consume approximately 30g of fresh jalapeño peppers 5. Videoendoscopy performed 12 hours after consumption showed no gastric or duodenal mucosal damage—the median endoscopic score was 0, identical to a bland control meal. Even when ground jalapeño peppers were placed directly into the stomach, endoscopy after 24 hours revealed no visible mucosal damage 5.
Common Pitfalls to Avoid
Don't perpetuate outdated dietary restrictions. The "seeds and nuts" myth persists despite being contradicted by all modern evidence. This unnecessarily restricts patients' diets and may actually be counterproductive, as healthy dietary patterns that include nuts and seeds are protective against diverticulitis 4.
The 2026 ACG guideline explicitly states that patients should maintain "a healthy diet (without avoiding nuts, seeds, corn, or popcorn)" 6.
Bottom Line
Jalapeños are safe for patients with diverticulosis or a history of diverticulitis. Direct your dietary counseling toward increasing fiber intake, maintaining healthy weight, regular exercise, and avoiding NSAIDs—interventions with actual evidence supporting their benefit 2, 1.