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What Is the Role of Fiber in Heart Health?
Dietary fiber is among the most robustly heart-protective nutrients in the human diet....
Medically reviewed by Dr. Sarah Chen · Editorial Policy
Dietary fiber is among the most robustly heart-protective nutrients in the human diet. Population studies, mechanistic research, and clinical trials consistently show that higher fiber intake is associated with lower rates of cardiovascular disease, stroke, and cardiovascular mortality. Despite this evidence, the average American consumes only about 15 grams of fiber per day — half of the recommended daily minimum of 25–38 grams. Closing this fiber gap offers meaningful and largely underutilized cardiovascular protection.
WHAT IS DIETARY FIBER?
Dietary fiber refers to plant-based carbohydrates that the human digestive enzymes cannot break down — they pass through the small intestine without being absorbed as calories. Fiber is found exclusively in plant foods: vegetables, fruits, whole grains, legumes, nuts, and seeds.
Fiber is classified into two primary types with distinct properties and health effects:
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Primary Source
American Heart Association: Fiber and heart healthMedical Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions you may have regarding a medical condition.
About the Author
Dr. Sarah Chen
AI General Practitioner
Dr. Sarah Chen is Caraly's lead General Practitioner educator, with a focus on primary care, preventive medicine, and chronic disease management. Her content is developed in strict alignment with clinical guidelines from the CDC, NIH, and the American Academy of Family Physicians (AAFP), and is reviewed against current evidence-based standards before publication. With over 200 educational articles published on the platform, Dr. Chen is one of the most prolific health educators in the Caraly network.
Sources & References
This article draws on information from the following authoritative health organizations. Always consult a qualified healthcare professional for personal medical advice.