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| Sr. no. | Bio-polymers | Source |
|---|---|---|
| 1 | Starch | Cereals, grains, and potatoes |
| 2 | Chitosan | Shells of crustacean |
| 3 | Guar gum | Guar seeds (Cyamopsis tetragonoloba plant seeds) |
| 4 | Alginate | Brown algae |
| 5 | Gelatin | Hydrolysis of collagen (derived from the connective tissues of animals) |
| 6 | Lignin | Support tissues of most plants |
