| Product | Produced by | Type of microbe |
| vitamin C | Acetobacter spp. | bacterium |
| carrageen (gelling agent) |
Chondrus crispus (seaweed) |
alga |
| enzymes such as invertase
used in the manufacture of sweets |
Saccharomyces cerevisiae (yeast) |
fungus |
| citric acid used in fizzy drinks | Aspergillus niger
(mould) |
fungus |
| amino acids such as glutamic acid and the flavour enhancer, monosodium glutamate (MSG), sodium salt of glutamic acid |
Corynebacterium glutamicum | bacterium |