How do you place an order?

Go to to place online orders – our products are available exclusively online.

How fast will I receive my order?

All UK orders are sent out the next business day after an order is placed. Depending on the your address, all orders should arrive within 2-3 business days via First Class Royal Mail.

Is there any special discount for Affiliate Programs, Pro or Club Teams?

For more information please email: or

How do I change my contact information?

Go to your account information and login under returning customer. Your account information can be changed and then click “Update” for those changes to go into effect.

Is my credit card number secure when I pay for an order online?

At Xendurance,  customers are our number one priority. That’s why we go to such great lengths to guarantee the security of all transactions. Our secure socket layer (SSL) is among the best technology available today. It uses 1024 bit encryption to scramble all personal data you share with us, including your credit card and telephone numbers, name and address.

Does Xendurance stand behind its products?

Xendurance Guarantee Policy: If you are not completely satisfied with your purchase, simply return the unused portion to us for a full refund, less shipping and handling charges. Refunds are valid for 30 days from the purchase date of the product. To obtain a return authorisation number for refunds, which is required before you ship product back to us, please email The return address and shipping instructions will be provided to you at this time. Upon receipt of your returned shipment, your refund will be issued within 10-15 days.

What is ISO 17025 Accreditation and why is it important?

ISO 17025 is the key standard for an analytical laboratory. It provides absolute confidence that if contamination exists above the defined limit of detection, then it will be identified and called “positive”.

Laboratories that do not meet this standard may call a “negative” simply because they are unable to find the contamination, NOT because it is absent. Their techniques may be wholly inadequate.

Analysis is of no value unless it meets the exacting requirements of the various regulating bodies.

Lifespan International (the parent company of Xendurance) uses HFL Sport Science to test products because HFL understands the importance of integrity, and analytical methods for supplement analysis to meet the requirements of:

  • ISO 17025 (international standard for analytical laboratories)
  • GLP (Good Laboratory Practice)
  • GMP (Good Manufacturing Practice)

Results are therefore dependable, and will withstand scrutiny in High Court, in any jurisdiction around the world.

Athletes who see the INFORMED-CHOICE & INFORMED-SPORT logo on a product or brochure or any media of any type must review the lot# on the product pouch and confirm that particular lot# is noted as tested and certified in LGC Sport Science. If the lot# is listed under INFORMED SPORT and INFORMED CHOICE and shown to be certified, then they can be confident it has undergone a rigorous screening program for banned substances and is safe to use. If you do not see the lot# as certified under LGC Sport Science, please contact Xendurance by email for assistance prior to use.