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View compareNow available in Berkeley Life bottles! With a powerful formulation developed by Dr. Nathan S. Bryan, nitric oxide researcher and expert, this serum offers a topical complement to Berkeley Life’s supplement. Now, practitioners have tools to support adequate nitric oxide levels in patients from the inside, out. Nitric oxide serum delivers nitric oxide directly to the epidermis to help maintain healthy-looking skin. Watch the skin react in real time to the application of nitric oxide.