L-Arginine is the biological precursor of nitric oxide (NO). Each serving of AF-8 contains 5.25 mg of L-Arginine. Boost your immunity now!

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An Antiviral Mechanism of Nitric Oxide: Inhibition of a Viral Protease

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Does Nitric Oxide Play a Critical Role in Viral Infections?

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*Always read the label. Use only as directed. Vitamin Supplements should not replace a balanced diet. If symptoms persist consult your healthcare professional.