O
- Octyl gallate - antioxidant
- Evening primrose (Oenothera biennis et al.) -
- Okra oil (Hibiscus seed oil) - from the seed of the Hibiscus esculentus. Composed predominantly of oleic and lanoleic acids.
- Oleomargarine -
- Olive oil - used in cooking - cosmetics - soaps and as a fuel for traditional oil lamps
- Orange GGN - color (orange)
- Orange oil - like lemon oil - cold pressed rather than distilled. Consists of 90% d-Limonene. Used as a fragrance, in cleaning products and in flavoring foods.
- Orcein - color (red)
- Orchil - color (red)
- Oregano (Origanum vulgare, O. heracleoticum, and other species) -
- Oregano oil - contains thymol and carvacrol - making it a useful fungicide. Also used to treat digestive problems.
- Orris root -
- Orthophenyl phenol - preservative
- Oxidised polyethylene wax - humectant
- Oxidised starch - thickener, vegetable gum
- Oxystearin - antioxidant, sequestrant
Read more about this topic: List Of Food Additives