Secure Shopping Details

You can shop at with confidence. We have partnered with Authorize.Net, a leading payment gateway since 1996, to offer safe and secure credit card and electronic check transactions for our customers.

The Authorize.Net Payment Gateway manages the complex routing of sensitive customer information through the credit card and electronic check processing networks. The company adheres to strict industry standards for payment processing, including:

  • 128-bit Secure Sockets Layer (SSL) technology for secure Internet Protocol (IP) transactions.
  • Industry leading encryption hardware and software methods and security protocols to protect customer information.
  • Compliance with the Payment Card Industry (PCI) Data Security Standard.

If you prefer, we can process your transaction by phone, fax or mail. Call us at +1-508-793-7526 during our business hours (9AM-5PM EST), fax us at +1-508-793-8842 or mail your order to: Clark Labs, 950 Main Street, Worcester, MA 01610 USA.

This domain ( is registered with the Authorize.Net Verified Merchant Seal program.


Clark University