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Macronutrients – Carbohydrates

Cellulose

Indigestible plant fiber that provides structure to plant cells and supports digestive health.

Definition

An insoluble polysaccharide forming the structural component of plant cell walls that cannot be digested by human enzymes.

How it works

Cellulose is the most abundant organic polymer on Earth, comprising plant cell walls and providing structural integrity to all plant tissues. Humans lack the enzymatic machinery to break the beta-glycosidic bonds in cellulose, making it completely indigestible. Despite not providing energy, cellulose serves critical functions in digestive health by adding bulk to stool, promoting bowel regularity, and feeding beneficial gut bacteria through fermentation in the colon. Cellulose is a key component of insoluble dietary fiber.

Role

Promotes digestive health and regularity by providing bulk and stimulating intestinal muscle contractions without contributing calories.

Examples

  • Vegetable skins
  • Whole grains
  • Legumes
  • Nuts
  • Seeds
  • Leafy greens
  • Broccoli stems

Recommendations

Consume at least 25-35 grams of fiber daily, with cellulose as a significant component. Choose whole plant foods over processed alternatives. Gradually increase fiber intake to allow digestive adaptation and prevent bloating.

Key takeaway

Cellulose is essential indigestible fiber that promotes digestive regularity and overall gut health.

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