Fiber and Digestive Health

Why Digestive Health Matters

Many people with chronic pain experience digestive issues. Pain medications (especially opioids), reduced activity, and diet changes can cause constipation. Emerging research also links gut health to pain and inflammation. Adequate fiber supports digestive function and overall health.¹

Common Digestive Issues²

• Opioid-induced constipation (very common)
• Constipation from reduced activity
• IBS overlap with chronic pain
• Medication side effects

Types of Fiber

Soluble Fiber

• Dissolves in water, forms gel
• Slows digestion
• Good for diarrhea
• Sources: oats, beans, apples, citrus

Insoluble Fiber

• Doesn't dissolve, adds bulk
• Speeds transit time
• Good for constipation
• Sources: whole grains, vegetables, bran

Fiber-Rich Foods³

• Whole grains (oatmeal, whole wheat)
• Legumes (beans, lentils)
• Fruits (berries, apples, pears)
• Vegetables (broccoli, carrots)
• Nuts and seeds
• Bran cereals

How Much Fiber?

• Women: 25 grams/day
• Men: 38 grams/day
• Most people get only 15 grams
• Increase gradually to avoid bloating

Managing Opioid-Induced Constipation

• Increase fiber intake
• Drink plenty of water
• Stay active as possible
• Consider stool softeners
• Osmotic laxatives if needed
• Ask about prescription options

Other Tips

• Increase fluids with fiber
• Establish regular bathroom routine
• Don't ignore urges
• Prunes and prune juice can help
• Consider probiotics

References

1. Quigley EMM. Gut bacteria in health and disease. Gastroenterol Hepatol. 2013;9(9):560-569.
2. Müller-Lissner S. Opioid-induced constipation: mechanisms and treatment approaches. Expert Opin Pharmacother. 2019;20(6):617-622.
3. McRorie JW, McKeown NM. Understanding the physics of functional fibers in the gastrointestinal tract. Nutr Today. 2017;52(1):30-39.