We pride ourselves on having the best customer service in the industry. We feel that the more our customers know about nutrition and health, the more they will understand why Complete Runner’s Nutrition™ is the best supplement available for Runners.

For questions or assistance:

Please review our FAQ’s page for answers to the most commonly asked questions we receive. If you still seek assistance, please feel free to write, call or email us:

Write us:

Attn: Customer Support Department
Siren Laboratories, LLC
16161 Ventura Blvd #491
Encino, CA 91436

Call us:

Our Customer Service Representatives are available to take your call toll-free Monday through Friday, 9:00 am – 6:00 pm (PST) at: (888)786-4404

Email us:

You may contact us via e-mail using the form below. All questions, comments or concerns that are sent via email will be responded to as promptly as possible (usually within the same day).

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