Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Welcome to GSI
Customer Service M-F 9am-5pm EST
Free shipping on All Orders Over $50



We list every ingredient and dosage clearly on our labels
Every GSI product is built from peer reviewed research and proven nutritional science not marketing hype. Our R&D team is relentless in refining each formula for safety, taste, and performance.
From our award winning proteins to our keto and energy innovations, we never sacrifice flavor for function. Because supplements should taste as good as they perform.
All products are produced in cGMP certified, NSF audited facilities and tested for purity, potency, and consistency. If it doesn’t meet our internal standards, it doesn’t make it to the shelf.
Is an industry leader in sports nutrition and supplement manufacturing. The facility is cGMP-certified, NSF-audited, and specializes in protein powders, functional beverages, and powdered formulations. Each batch produced undergoes rigorous quality assurance testing to verify purity, potency, and ingredient accuracy.
At Giant Supps, we take pride in producing our supplements right here in the United States. Each product is manufactured in our state-of-the-art facilities located in Texas and North Carolina, using domestic and imported ingredients that meet rigorous quality specifications. All materials are tested for purity, potency, and safety before use, and every finished batch is verified by third-party laboratories, including Eurofins Scientific. This combination of trusted U.S. manufacturing and globally sourced, high-quality ingredients allows us to deliver safe, effective, and consistent products you can count on
Give the gift of performance.
The GSIDigital Gift Card is the perfect choice for any fitness lover, athlete, or wellness enthusiast. Available in $10, $25, $50, and $100, it lets them choose their favorite products whenever they want.
Gift cards are delivered instantly by email with easy redemption at checkout. No fees. No expiration. Just pure freedom to fuel their goals.
We offer a 100% money-back return policy if you are unhappy with our products within 15 days of your purchase. Please note that the product must be returned unused, in original packaging including all labels. Please note that neither the original shipping cost nor the return shipping cost will be refunded.
If a package is returned to us due to an incorrect or incomplete address, is marked “unclaimed” or “return to sender,” or has been deemed undeliverable for any reason by the final mile carrier, we will notify you by email. Once the package is delivered back to us, our returns team will process it and refund the subtotal of your order.
A refund will not be issued until the parcel has arrived back in our facility.
Note: Once we have processed a refund, it can take your bank anywhere from 2-8 business days to process the refund on their end and issue it back to your account.
Make sure you provide the correct address at checkout because we are not responsible if your order gets delivered to the wrong address.
If you contact the final mile carrier after the order has left our warehouse and ask them to forward or redirect your package, we are not responsible if that package gets lost, stolen, or damaged.
In the case of Free Shipping, orders that are returned back to us due to an incomplete or unknown address OR packages that are refused/return to sender will be refunded LESS what the shipping and handling charges would have been without the promotion.
Your local delivery or postal driver, at his/her discretion, may choose to leave the package at the door or on your porch. We are not responsible for packages that are damaged, lost, or stolen after the driver confirms delivery of the package.
We strongly recommend that you check the tracking link provided to you frequently to make sure someone is there to receive the package at the time of delivery. You will receive a tracking number and link for your package once it has left our warehouse.
If you have any questions regarding the tracking information given to you or your package shows delivered and you can’t find it, please contact your local post office for assistance. We only see what the tracking page says, BUT your local post office can definitely give you more information.
If you don’t believe a delivery was made, please submit an inquiry to contact@giantsupps.com
Return Address: Giant Sports International 2101 Atlantic Ave, Suite A. Manasquan, NJ 08736
We aim to ship out your order by the next business day. Depending on your location, shipping time may vary. You will typically receive your order within 3-5 business days and we currently only ship to the US.
We will email you the tracking information so you can follow your delivery if you choose. If you have any issues with delivery or the shipping address, please contact us as soon as possible.
Made in a facility that also processes milk, eggs, soy, tree nuts, peanuts, fish, crustaceans, shellfish, and wheat products.
Store in a cool dry place. Do not expose to excessive heat or moisture. This product is only intended for use in healthy adults 18 years of age or older. Do not use if safety seal is missing or broken.
*These Statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Prop65 Warning (California Residents Only) This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or reproductive harm. For more information: www.P65Warnings.ca.gov
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