The ON Weekend ran from the 12th of September until Sunday, the 14th, concluding at 11:59 pm AEST. Customers had the opportunity to shop either online or in-store across all 120 locations throughout Australia & New Zealand. During the event, the entire range of Optimum Nutrition range of supplements was available at discounts of 20% off.

ABSOLUTELY EVERYTHING from ON was on sale during the event. Customers enjoyed 20% off all products excluding cases of 12 drinks and bundles. The sale is now over, but don’t worry—Optimum Nutrition will be back with more exciting deals in 2026. See you then!

GOLD STANDARD PRE WORKOUT by Optimum Nutrition delivers 175 mg of natural caffeine, creatine, and beta-alanine to boost energy, focus, and endurance. Informed-Choice certified and low in calories, it’s designed to help you train harder and perform at your best.

GOLD STANDARD 100% WHEY Whey by Optimum Nutrition provides 24 g of high-quality protein per serving with only about 1 g of fat and 3-4 g carbs, making it a lean option to help repair muscle and support strength. It’s whey isolate-rich (for faster absorption), mixes easily, contains over 5 g of naturally occurring BCAAs, and is Informed-Choice certified for banned-substance safety.

The Optimum Nutrition Weekend runs from 12–14 September 2025, with early access from 5:00pm AEST on 11 September. Enjoy 20% off the Optimum Nutrition range plus $2 Amino.Energy cans (max 6 per customer, while stocks last). Available in-store and online at Nutrition Warehouse. Offer applies to full-priced items only and excludes bundles and stacks. Cannot be combined with other discounts.