In the body, Glutamine functions as a major nitrogen transporter and is critical for the maintenance of healthy nitrogen balance. Glutamine also acts as the primary fuel for the rapidly growing cells of the immune system and GI tract. Listing and template services provided by ink - Many of our items have extended handling days. By making a purchase, you consent to these requirements and to follow all applicable laws and carrier regulations. The answer is no. Nutritional and personal care items must always be returned with the seal unbroken in order to be refundable. This will greatly speed up the returns process, your eventual refund, and prevent your return from being lost by the carrier.