Product Description
Optimum Nutrition Pro Gainer is a high-protein mass gainer for NZ lifters aiming to build lean size and recovery support. It packs serious protein, carbs, and nutrients to help you meet calorie targets without empty filler.
Why Choose Pro Gainer?
-
60 g protein per serving – supports muscle recovery and growth.
-
82 g carbohydrates per serve – restores glycogen and fuels intense workouts.
-
650 calories per shake – helps you maintain a surplus when needed for size.
-
Includes 20+ vitamins & minerals – aids overall health and performance.
-
Few added sugars & clean macro profile – gets you calories without needless extras.
How to Use
-
Mix one heaping scoop with water or milk (about 350-450 ml) depending on flavour and texture preferences.
-
Use post-workout or between meals to help hit your daily calorie and protein targets.
-
Stay consistent with training and nutrition; adjust serving size as your needs grow.
Pro tip: If you struggle with appetite, split the serving into two smaller shakes: one post-workout and one between meals.
Who’s It For?
-
Hard gainers & ectomorphs – who need extra calories to gain mass.
-
Strength athletes – wanting to rebuild muscle after intense sessions.
-
Busy people – who find it hard to eat enough through whole foods alone.
-
Users aiming to improve body composition while gaining mass – with minimal fat gain.
FAQ
What makes Pro Gainer different from other gainers?
Pro Gainer gives you a high protein-to-carb ratio, fewer sugars, and includes essential vitamins/minerals — designed for clean mass gain.
How many serves per container?
You get multiple servings per tub (around 28), sufficient for several weeks depending on usage.
Is it only for post-workout use?
No — while post-workout is key, you can also use it between meals or as needed to meet your calorie goals.
Why Buy from Sprint Fit?
-
100% authentic supplements
-
Free NZ shipping on orders $60+
-
Same-day dispatch nationwide
-
Trusted by Kiwi athletes and fitness enthusiasts
Pro Gainer – your premium formula for clean size, recovery, and performance.
Facts
Container Size:10Lb
Serving Size: 1 Heaping Scoop (165g)
Servings Per container: 28
Shipping
All orders $60 and over receive Free* Shipping Nationwide
Final pick up each day is at 3.45pm Monday to Friday.
Estimated Delivery Times*:
Auckland and North Island – Overnight
However many Auckland orders will be delivered the same day depending on what time the order is placed)
South Island – Overnight (For larger parcels allow 2 business days)
Same Day/Evening Express Shipping upgrade available at checkout for select suburbs*
Click here to view the full Shipping Details and Returns Policy.
Optimum Nutrition Pro Gainer Reviews

VanillaWeight gainers (as proteins) are generally a hit and miss, until you find one you like. Solid amount of protein and low carbs are excellent but in this case, I am not thrilled about it due to the taste. The vanilla is actually called vanilla custard, and surprisingly enough tastes of that. I might give the banana cream one a shot next time.

Banana CreamThis is the only gainer for me!!! Mixes well, tastes great and puts the gains on!!!


Double ChocolateGreat product, mixes and tastes great. Good gainer to use for putting on clean mass

Double ChocolateReally liked this flavour and have already started to see results from taking this supplement in just 2 weeks. I am naturally quite skinny and I have found this to be an easy way to exceed my necessary calorie intake. I will be ordering this again when I run out, would recommend getting the larger size as the 2.5kg only has around 15 servings.

VanillaIt is a good gainer. Has helped me gain 2 kgs of good mass in couple of months. I like the flavors as well. It is not for endomorphs as has got a lot of calories... I am discontinuing it because it think this may be the reason for my recent teeth sensitivity...I am going back to my favorite pro complex.

Banana Cream1st time buying this gainer (I usually get the gold one,but i need something with more protein & GAINZ) and already the flavour Banana Cream is my new fave shake of all time and just within the week the Gains are coming through. Also you will want to buy the big size cause it's pretty filling, tasteful & affordable!!

Banana CreamGreat gainer I have gone through two of these already banana cream as I love bananas or vanilla as it mixes with everything. Not as thick as other gainers and easy to consume! Mixes well does get bit clumpy but just chuck in the steel mixer thing that helps.

Vanilla
Banana CreamI love On Nutrition Pro complex gainer. It is a right mix of protein and carbs, it will NOT put on extra fat and very good for lean muscle building. The bulking has been very gradual for me. 3 kg in 3 months and I take just one serving per day. Best part is how easily it mixes and the mild taste. Only down side is the cost. It is more expensive than other gainers.
