Fibre, also known as dietary fiber in some contexts, refers to the indigestible parts of plants. These are carbohydrates that pass relatively unchanged through our stomach and intestines. It's crucial to understand that this is different from the fibers found in connective tissue, discussed in some references. This answer focuses on dietary fiber.
Dietary Fiber: The Indigestible Plant Matter
Dietary fiber is found in foods like wholegrain cereals, fruits, and vegetables. It is composed of indigestible plant compounds that play a vital role in maintaining digestive health. The main role of fiber is to support a healthy digestive system. [Source: Better Health Channel, Mayo Clinic, Houston Methodist].
Types and Sources of Dietary Fiber:
- Soluble fiber: This type dissolves in water, forming a gel-like substance. It's found in foods like beans, oats, flaxseed, and oat bran. Soluble fiber can help lower cholesterol absorption. [Source: Mayo Clinic]
- Insoluble fiber: This type doesn't dissolve in water and adds bulk to the stool. Sources include whole wheat, vegetables, and some fruits. It promotes regular bowel movements. [Source: Houston Methodist, Healthline]
Health Benefits of Fiber:
- Improved Digestive Health: Fiber promotes regular bowel movements and prevents constipation. [Source: Houston Methodist, Medical News Today]
- Weight Management: Fiber makes you feel fuller, aiding in weight control. [Source: Houston Methodist, Healthline]
- Blood Sugar Control: Fiber can help regulate blood sugar levels. [Source: Healthline, PMC 7589116]
- Cholesterol Reduction: Soluble fiber may lower cholesterol absorption. [Source: Mayo Clinic]
- Gut Microbiome Diversity: Fiber nourishes beneficial bacteria in your gut. [Source: Houston Methodist]
Recommended Intake:
Adults generally need 25 to 35 grams of fiber daily, but most people consume far less. [Source: Harvard Nutrition Source]
