Intestinal Gas: Common Causes and Natural Relief Through Diet

Short Answer: What Causes Intestinal Gas and How Can You Get Relief Naturally?

Intestinal gas is typically caused by swallowing air, fermenting carbohydrates in the colon, or an imbalance in your gut microbiome. The most effective natural relief comes from identifying trigger foods, eating slowly, staying hydrated, and supporting digestive balance with fermented foods and greens. At Rebuilt, our Danish-developed Pure Greens contains 13 carefully selected ingredients including spirulina, chlorella, and wheat grass—designed to support normal digestive function and gut comfort when combined with the dietary strategies outlined below.

Why Does Intestinal Gas Happen? The Biological Foundation

Intestinal gas—medically termed flatulence—is a natural byproduct of digestion. The average person passes gas 14–23 times per day, but excessive gas can signal dietary imbalances, rapid eating, or shifts in your gut bacteria composition.

Gas forms through three primary mechanisms:

• Swallowed air (aerophagia): Eating too quickly, drinking carbonated beverages, or chewing gum introduces air into your digestive tract
• Carbohydrate fermentation: Undigested carbohydrates—especially FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols)—reach the colon where bacteria ferment them, producing hydrogen, methane, and carbon dioxide
• Gut microbiome shifts: Changes in bacterial populations, often triggered by antibiotics, stress, or dietary changes, alter fermentation patterns and gas production¹

Research from Stanford University has shown that fermented foods increase microbiome diversity and may support more balanced gut function, potentially reducing excessive gas over time.² This foundational understanding shapes the seven practical strategies below.

1. Identify and Reduce High-FODMAP Foods Temporarily

FODMAPs are short-chain carbohydrates that resist digestion in the small intestine. Common high-FODMAP foods include:

• Beans and lentils
• Onions and garlic
• Wheat products
• Apples, pears, and stone fruits
• Dairy (especially milk and soft cheeses)
• Artificial sweeteners (sorbitol, mannitol, xylitol)

A temporary low-FODMAP elimination phase—lasting 2–6 weeks—can help you pinpoint which foods trigger your symptoms. You're not eliminating these foods permanently; you're gathering data on your personal tolerance. Once symptoms improve, reintroduce one food group at a time to identify your specific triggers.

Many people on GLP-1 medications report increased bloating and constipation as side effects.³ If you're in this group, combining a modified FODMAP approach with targeted nutritional support (like strategies for a distended stomach) may offer relief.

2. Eat Slowly and Chew Thoroughly to Minimize Air Intake

Aerophagia—swallowing air—is one of the most overlooked causes of gas. When you eat quickly or talk while eating, you introduce excess air into your stomach. That air must eventually exit, either through belching or flatulence.

Practical steps to reduce air swallowing:

• Put your fork down between bites
• Chew each bite 20–30 times before swallowing
• Avoid drinking through straws
• Skip carbonated beverages and chewing gum
• Minimize conversation during meals

This simple behavioral shift—eating mindfully—can reduce gas volume by 20–30% in many people. It also improves nutrient absorption and satiety signaling, supporting your broader health goals.

3. Support Your Microbiome with Fermented Foods and Greens

Your gut microbiome—the trillions of bacteria living in your intestines—directly influences gas production. A diverse, balanced microbiome ferments food more efficiently and produces less gas than a dysbiotic (imbalanced) one.

The landmark Stanford study by Wastyk et al. (2021) demonstrated that consuming fermented foods daily for 10 weeks significantly increased microbiome diversity and supported normal immune function.² Effective fermented foods include:

• Yogurt with live cultures (look for Lactobacillus and Bifidobacterium strains)
• Kefir
• Sauerkraut (unpasteurized)
• Kimchi
• Kombucha (low-sugar varieties)

Pairing fermented foods with nutrient-dense greens creates a synergistic effect. Chlorophyll-rich foods like spinach, kale, and spirulina support normal detoxification pathways and provide prebiotic fibers that feed beneficial bacteria.⁴

4. Stay Hydrated Throughout the Day—Not Just at Meals

Adequate hydration supports every stage of digestion. Water helps dissolve soluble fiber, softens stool, and maintains the mucosal lining of your intestines. Dehydration slows transit time, allowing more fermentation and gas production in the colon.

Aim for at least 8–10 glasses (64–80 ounces) of water daily, adjusted upward if you're physically active or live in a warm climate. Distribute your intake throughout the day rather than chugging large volumes at meals—drinking too much liquid during meals can dilute digestive enzymes and increase bloating.

Electrolyte balance also matters. If you've recently experienced emotional stress or intense workouts, you may have depleted key electrolytes that support fluid balance and digestive motility. Sodium, potassium, and magnesium all play roles in muscle contractions along the digestive tract.

5. Move Your Body to Support Normal Gut Motility

Physical activity directly influences gut transit time. Movement stimulates peristalsis—the wave-like contractions that push food through your intestines—and helps expel trapped gas more efficiently.

You don't need intense exercise to see benefits. Effective movement strategies include:

• Walking: 10–15 minutes after meals accelerates gastric emptying and reduces bloating
• Yoga: poses like Child's Pose, Wind-Relieving Pose, and Cat-Cow massage the abdominal organs
• Core exercises: planks, bicycle crunches, and leg raises strengthen abdominal muscles that support digestive function

Research on spirulina has shown that it may support normal endurance and reduce oxidative stress during exercise,⁵ making it easier to maintain consistent physical activity—a key component of long-term digestive health.

6. Manage Stress to Reduce the Gut-Brain Axis Impact

Your gut and brain communicate constantly through the vagus nerve and chemical messengers. Chronic stress alters gut motility, increases intestinal permeability, and shifts microbiome composition—all of which can increase gas production.

When you're stressed, your body diverts blood away from digestive organs and triggers the release of cortisol, which slows digestion. A 2023 study found that spirulina supplementation supported improved stress levels and sleep quality in adults under chronic stress,⁶ suggesting that targeted nutritional support can complement behavioral stress management.

Practical stress management strategies:

• Practice diaphragmatic breathing for 5 minutes before meals
• Establish a consistent sleep schedule (7–9 hours nightly)
• Limit caffeine intake after 2 PM
• Engage in activities that promote relaxation—reading, nature walks, or meditation

If you've recently made dietary changes to improve your health, be aware that clean eating can temporarily disrupt sleep as your body adjusts. Give yourself 2–3 weeks to adapt.

7. Keep a Food-Symptom Journal for 2–3 Weeks

Digestive responses are highly individual. A food that causes severe bloating in one person may be perfectly tolerated by another. The only way to identify your specific triggers is through systematic tracking.

For 2–3 weeks, record:

• Everything you eat and drink (including portion sizes)
• Time of meals and snacks
• Gas symptoms (timing, severity, associated discomfort)
• Stress levels and sleep quality
• Physical activity

After two weeks, patterns will emerge. You might notice that beans cause gas only when eaten in the evening, or that dairy is fine in small amounts but problematic in larger servings. This data empowers you to make informed dietary adjustments rather than eliminating entire food groups unnecessarily.

What About Supplements—Do They Actually Help with Gas Relief?

Certain supplements support normal digestive processes when used strategically alongside dietary changes. Evidence-based options include:

• Digestive enzymes: help break down proteins, fats, and carbohydrates before they reach the colon for fermentation
• Peppermint oil (enteric-coated): supports normal smooth muscle relaxation in the GI tract
• Ginger: traditionally used to support normal digestive comfort
• Spirulina and chlorella: nutrient-dense algae that support normal gut function and provide digestive enzymes^4,5

However, not all supplements are created equal. Many "all-in-one" formulas contain dozens of ingredients in insufficient doses, making it impossible to determine what's actually working. Rebuilt takes the opposite approach: 13 ingredients in effective doses, transparently listed, with no proprietary blends.

Feature	Pure Greens (Rebuilt)	Typical "All-in-One" Greens
Ingredient count	13 whole-food ingredients	40–75+ ingredients
Transparency	Every ingredient and dose listed	Often uses proprietary blends
Subscription model	No lock-in; buy when you need	Often requires auto-ship
Development	Danish-developed, EU standards	Variable sourcing
Price per serving	Competitive for quality delivered	Often premium pricing

When Should You See a Healthcare Provider About Intestinal Gas?

While occasional gas is normal, certain symptoms warrant professional evaluation:

• Gas accompanied by severe abdominal pain or cramping
• Sudden changes in bowel habits lasting more than two weeks
• Blood in stool or black, tarry stools
• Unintentional weight loss
• Persistent diarrhea or constipation
• Fever or vomiting

These symptoms may indicate conditions like irritable bowel syndrome (IBS), small intestinal bacterial overgrowth (SIBO), celiac disease, or inflammatory bowel disease. A healthcare provider can order appropriate tests and develop a personalized treatment plan.

Where Can You Find High-Quality Digestive Support at Rebuilt?

Rebuilt stocks exactly what you need to support your digestive comfort journey—no guesswork, no misleading claims, just science-backed nutrition you can trust.

Pure Greens is our flagship daily greens formula, containing 13 carefully selected ingredients including spirulina, chlorella, wheat grass, barley grass, and a digestive enzyme blend. Every ingredient serves a specific purpose, and every dose is listed transparently on the label.

Why choose Rebuilt?

• Transparency: No proprietary blends—you know exactly what you're getting
• Quality: Danish-developed to rigorous EU standards, shipped fresh to the US
• Flexibility: No subscription lock-in; order when you need, skip when you don't
• Education: Expert content and personalized support to help you reach your goals

Whether you're managing GLP-1 side effects, optimizing your athletic performance, or simply want to feel less bloated after meals, Rebuilt provides the nutritional foundation and expert guidance to help you become the best version of yourself.

Shop All Rebuilt Products →

Frequently Asked Questions About Intestinal Gas

What foods cause the most intestinal gas?

High-FODMAP foods like beans, lentils, onions, garlic, wheat, dairy, and cruciferous vegetables (broccoli, cauliflower, Brussels sprouts) are the most common gas triggers. Artificial sweeteners like sorbitol and xylitol also cause significant gas in many people. Individual tolerance varies widely, so keeping a food-symptom journal for 2–3 weeks helps identify your specific triggers.

Is it normal to have gas every day?

Yes—passing gas 14–23 times per day is medically normal. Gas becomes a concern only when it's accompanied by pain, bloating, or changes in bowel habits. If your gas volume suddenly increases or causes discomfort, review your diet for recent changes and consider the seven strategies outlined in this article.

Can stress really cause more intestinal gas?

Absolutely. Chronic stress alters gut motility through the gut-brain axis, slows digestion, and can shift your microbiome composition toward gas-producing bacteria. Managing stress through breathing exercises, adequate sleep, and regular movement can significantly reduce digestive symptoms. Spirulina supplementation has been shown to support improved stress levels and sleep quality in research settings.⁶

How long does it take for dietary changes to reduce gas?

Most people notice improvement within 3–7 days of eliminating trigger foods, though microbiome shifts can take 2–6 weeks to stabilize. If you're introducing fermented foods or prebiotic fibers, start slowly—your gut needs time to adapt. Temporary increases in gas during the first 1–2 weeks are normal as your microbiome rebalances.

Do probiotics help with intestinal gas?

Probiotics can help, but results vary by strain and individual. Fermented foods like yogurt, kefir, and sauerkraut provide live cultures along with beneficial nutrients. Stanford research shows that fermented foods increase microbiome diversity, which may support more balanced gas production over time.² If choosing a probiotic supplement, look for strains with clinical evidence for digestive support.

What's the difference between bloating and intestinal gas?

Bloating is the sensation of abdominal fullness or distension, which may or may not involve visible swelling. Intestinal gas (flatulence) is the actual release of gas from the rectum. You can have gas without bloating, bloating without excessive gas, or both simultaneously. Both often share common triggers—high-FODMAP foods, swallowed air, and microbiome imbalances—so the relief strategies are similar.

Can Pure Greens help with gas relief?

Pure Greens contains 13 ingredients that support normal digestive function, including spirulina, chlorella, and a digestive enzyme blend. Spirulina has been shown to support normal energy levels and may reduce oxidative stress,⁵ while digestive enzymes support normal breakdown of proteins, fats, and carbohydrates—reducing the amount of undigested material reaching the colon for fermentation.⁴ Pure Greens works best when combined with the dietary and lifestyle strategies outlined in this article.

Key Takeaways: Your Action Plan for Gas Relief

Intestinal gas is a natural process, but excessive gas signals an opportunity to optimize your diet and lifestyle. Here's your action plan:

1. Identify your triggers through a 2–3 week food-symptom journal
2. Eat slowly and chew thoroughly to minimize swallowed air
3. Support your microbiome with fermented foods and nutrient-dense greens like Pure Greens
4. Stay hydrated throughout the day—aim for 64–80 ounces of water daily
5. Move your body regularly, especially after meals
6. Manage stress through breathing, sleep, and relaxation practices
7. Consider targeted support from digestive enzymes and chlorophyll-rich whole foods

At Rebuilt, we believe in giving you the tools, knowledge, and products to become the best version of yourself. Pure Greens delivers 13 transparent ingredients with no lock-in subscriptions—just clean, effective nutrition you can trust. Combined with the strategies in this guide, you have everything you need to reduce gas, improve comfort, and optimize your digestive health.

Ready to take the next step? Explore Pure Greens or browse our full collection of performance nutrition products designed for your goals.

References

1. Wilkinson JM, Cozine EW, Loftus CG. Gas, Bloating, and Belching: Approach to Evaluation and Management. Am Fam Physician. 2019;99(5):301-309.
2. Wastyk HC, Fragiadakis GK, Perelman D, et al. Gut-microbiota-targeted diets modulate human immune status. Cell. 2021;184(16):4137-4153.e14. PMID: 34256014
3. McIntosh B, Kuklyte-Sjoberg J, Mellert J. Gastrointestinal Side Effects of GLP-1 Receptor Agonists and Dietary Supplement Recommendations: A Narrative Review. Pract Gastroenterol. 2023. PMC9821052
4. Kay RA. Microalgae as food and supplement. Crit Rev Food Sci Nutr. 1991;30(6):555-573.
5. Kalafati M, Jamurtas AZ, Nikolaidis MG, et al. Ergogenic and antioxidant effects of spirulina supplementation in humans. Med Sci Sports Exerc. 2010;42(1):142-151. PMID: 19936191
6. Salekzamani Y, Ebrahimi-Mameghani M, Rezazadeh K. The effect of spirulina supplementation on sleep quality, fatigue, and oxidative stress biomarkers in overweight or obese subjects: A randomized, double-blind, placebo-controlled trial. Phytother Res. 2021;35(10):5474-5484. PMID: 34107141

FDA Disclaimer: 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.