What foods are not broken down by intestinal bacteria?

Dietary fibers:

- Cellulose

- Hemicellulose

- Lignin

- Pectin

- Resistant starches

Other plant components:

- Tannins

- Phytic acid

- Saponins

- Waxes

- Cutins

Animal-derived compounds:

- Chitin

- Keratin

- Collagen

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