Pyrroloquinoline quinone (PPQ)
Once viewed as a nonessential antioxidant, PPQ was first discovered in 1979, although it wasn't immediately recognized as a vitamin. In 1995, a study in the Nutrition Review, discussed PPQ's usefulness as an antioxidant in fighting cellular damage. A recient study had firmly established PPQ as the first nre vitamin to be identified by scientists in 55 years.
The best know source of PPQ is natto.
Other PPQ-rich foods include parsley, greem tea, green peppers, kiwi and papaya.
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