Optimum Nutrition

Purchase any Optimum Nutrition product from Sportsfuel between April 16th - April 29th to be in to WIN the Ultimate Gallagher Chiefs Weekend for you and 2 mates! Prize pack includes 3 tickets to: Friday 6th May - Attend the Captains Run and Saturday 7th May - Attend the Gallagher Chiefs vs Brumbies Game (Food + Beverages + Covered Seats Included).
Optimum Casein Protein 1.8kg

Optimum Casein Protein 1.8kg

Slow Protein Digestion! Low Carb Slow Digesting, Anti Catabolic Micellar Protein With Glutamine! Sometimes slower is better - especially when it comes to the rate of protein digestion. While rapid protein absorption is desirable immediately before or after exercise, delayed release is probably more beneficial throughout the remainder of the day. Casein proteins are pH sensitive...


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Optimum Nutrition is one of the most popular supplement brands in the world — and for good reason. With an enormous range of products, from whey protein powder and mass gainers to amino acid energy drinks and capsules, their diverse range caters for everyone including the casual gym-goer, the serious athlete and everyone in between.

All Optimum Nutrition supplements are made by the company themselves under stringent standards. This means that they are able to maintain complete control over their products from production to distribution. They are also able to ensure that every product put onto the shelves is of a consistently high standard and contains exactly what it says on the label.

At Sportsfuel New Zealand, we stock a wide range of Optimum Nutrition products, including the popular Gold Standard Whey Protein, Optimum Pre Workout and Amino Energy.

All about Optimum Nutrition products

  • Optimum Nutrition Gold Standard

The Optimum Nutrition Gold Standard range is one of the most popular and best-selling protein powder ranges on the market. It caters for all types of athletes and bodybuilders, from those who just want to replace a meal with a low-calorie shake to those looking for extra protein as part of their muscle-building or fat-loss plan.

The Gold Standard range also includes pre-workout supplements and mass gainers.

  • Optimum Nutrition Amino Energy

Combining amino acids with caffeine, Optimum Nutrition Amino Energy is a unique offering from ON that acts as an effective pre-workout supplement. 

Aminos are the building blocks of muscle tissue and help repair muscles after strenuous exercise, improving recovery time. The addition of caffeine makes this supplement even more effective, giving you a burst of energy for your workout.

Amino Energy is available as a sports drink or as a powder supplement with or without electrolytes.

  • Optimum Nutrition Protein Powder

One of the most popular whey protein powders on the planet, Optimum Nutrition Whey Protein is used by athletes and gym enthusiasts around the world for a number of reasons, including its high quality, excellent taste, ease of use and value for money.

If you’re looking for something similar to Optimum Nutrition Gold Standard Whey Protein Powder, try Optimum Nutrition Casein Protein Powder for a slower release of protein.

  • Optimum Nutrition Creatine

If you’re looking to increase strength and muscle mass, Optimum Nutrition Creatine is another of the most popular supplements on the market. Used by athletes, bodybuilders and weightlifters alike. Available as Optimum Nutrition creatine capsules or micronised powder, ON Creatine is ideal for incorporating into your daily routine, even at high doses.

  • Optimum Nutrition Pre Workout

Optimum Nutrition Pre Workout is a unique pre-training supplement that combines energy and focus-boosting caffeine with creatine and other premium ingredients to help you achieve your best workout.

Available in tasty flavours like Green Apple, Blueberry and Fruitpunch, this supplement is a delicious way to boost your performance and motivate you to start every workout so you can reach your goals faster than ever.

  • Optimum Nutrition Mass Gainer

Optimum Nutrition Mass Gainer is a tasty, high-calorie mass gainer that helps you reach your daily nutritional intake requirements. Containing complex carbohydrates for sustained energy release and with over 50g of protein per serving, this supplement is perfect for bodybuilders, weightlifters and gym-goers looking to retain hard-earned muscle mass while gaining size.

Buy Optimum Nutrition supplements at Sportsfuel NZ

If you're looking for the best supplements in NZ, Optimum Nutrition is a trusted brand with thousands of happy customers all over the world. With great prices, top-quality products and fast and free shipping, Sportsfuel is your one-stop shop for all your supplement needs in New Zealand.