While PQQ is available as a dietary supplement, it can also be obtained from various food sources. Foods such as green peppers, kiwi fruit, and fermented soy products like natto are known to be rich in PQQ. For those considering supplementation, it's essential to consult with a healthcare provider, as the appropriate dosage can vary based on individual health needs and conditions.
Non-compliance with these regulations can result in severe consequences, including drug recalls, market withdrawals, and legal action. Therefore, pharmaceutical companies invest significantly in quality assurance programs to maintain the integrity of their APIs.