What's Considered a "Good Deal" on Whey Isolate? (per 100g or per kg?)

m4gician on 20/04/2025 - 10:32

Hey folks, just wondering if anyone here has a sense of what a good price is for Whey Isolate when it goes on sale? I’ve been trying to keep an eye on deals, but the prices are kind of all over the place — and it’s hard to tell what’s actually a bargain vs just marketing fluff.

Ideally, I’d love to know:

What’s a solid price per 100g or per kg that makes it worth pulling the trigger?

Which retailers or brands tend to have the best deals (genuine isolate, not blends)?

Any tips on spotting a proper isolate vs one that’s labelled that way but is really a concentrate or blend?

Appreciate any guidance — just trying to stock up smart without overpaying. Thanks!

Food & Grocery Bodybuilding Supplement Whey Protein Isolate

Comments

  • Jimothy Wongingtons on 20/04/2025 - 10:51

    Aminoz with the continual store credit cycles was a great price previously, unfortunately a shortage and price increases have meant we haven’t seen the usual good bargains for months. I’ve resorted to topping up with bulk nutrients Future Whey , a non dairy based alternative which is more expensive but easier on stomach

    • hasher22 on 20/04/2025 - 15:00

      +1 for amino z, unfortunately, as you said they haven't posted a deal in months which I am waiting on. :(

    • RotundPolarBear on 20/04/2025 - 18:49
      +1

      Why wouldn't you continue to support amino z even without the deal, instead of paying full price at a competitor (that never runs any deals)?

      • stuckster on 20/04/2025 - 20:24
        +4

        Firstly, no OZB should be paying full price for anything. Secondly, I'd like to continue supporting Amino Z, but after two price increases in 3 months there are more competitive options of comparable (or better) quality on the market.

  • nomoneynoproblems on 20/04/2025 - 15:16
    +1

    $55 per kg is the standard RRP baseline for whey isolate atm imo. Anything more and you're paying overs. Therefore if we take that into consideration, anything less than $50 per kg for isolate is a legit bargain. Unfortunately the days of Aminoz running their promos like the previous black friday deals are truly over.

    • m4gician on 20/04/2025 - 15:27
      +1

      Appreciate this. So basically anything at smaller volumes under $50/kg is what I should be striving for.

      • stuckster on 20/04/2025 - 15:39
        +1

        Yes, but you'll be lucky to get that pricing under 1kg. The stuff keeps for a while, so unless you're taste testing you may as well go for the 1kg.

      • nomoneynoproblems on 20/04/2025 - 16:18

        Basically, but the chances of small volume at that price will be pretty slim. I'd suggest concentrate for your everyday gym rat/tight arse. imo, unless you're bodybuilding, WPC is perfectly fine.

        • stuckster on 20/04/2025 - 22:16

          It also depends on your age and your body fat goals, whether you want to lose fat/cut, bulk or maintain.
          WPI (though more expensive) has fewer carbs and fats and a higher percentage of protein so may be better for someone watching their calorie intake while still maintaining a good level of quality protein consumption.

          • nomoneynoproblems on 20/04/2025 - 22:36
            +1

            @stuckster: Agree in concept, but for the everyday person WPC is more than enough. Unless you're serious about hitting sub 12% bf levels there really is no need for WPI, with the exception of lactose tolerance imo. That extra gram(s) of carbs is easily offset by the dozen other junk 'snacks' or excess carb intake 99% of things people inadvertently add to their diet. The other tiny percentage of 'lower' quality protein is again, can be offset by having an extra 20g of lean meat instead of relying on the supplement to do the heavy lifting (pun intended). You gotta remember, whey is a supplement that you're having at best, a scoop a day of. The rest of your calorie intake should be a clean diet. Like i said, unless you're getting absolutely shredded, the last thing I would be looking at is if my Whey is WPC or WPI.

  • stuckster on 20/04/2025 - 15:40
    +1

    Also consider Micellar Casein for your rest days. Take a couple of hours before bed. Cheaper per kg and equal or better quality protein.

  • eating kiwi fruit on 20/04/2025 - 16:45
    +1

    Remember to consider the protein content per 100g when comparing both between brands, but also when comparing flavours from the same brand. Different flavours will have different percentages of protein content because of the other sweeteners/additives, and the variances can be more significant than you would expect. I would worry about this just as much as isolate vs concentrate, unless you have digestion issues with WPC or stricter macro requirements. Unflavoured & unsweetened products can be much higher protein content than you might expect also.

    I definitely recommend calculating price per gram of protein, rather than gram of product, whilst also determining what threshold of protein percent you want as to filter out poorer protein source products.

    Aminoz and Bulk Nutrients both provide tables for each of their flavours and the respective protein %, as should all other trustworthy brands when comparing online. If in store, the nutrition label will give you protein per 100g as well.

    • stuckster on 20/04/2025 - 22:07

      Great buying advice to look at the price per gram of protein and to compare flavours. 👍
      I always go for the flavour with the highest scores. Can't stomach the unflavoured stuff!

      To take things to the next level (for those interested) there are two other factors that are really important in determining the quality of different protein sources.

      Amino Acid Profile and True Ileal Digestibility

      • Amino Acid Profile
        There are 9 Indispensable Amino Acids (IAAs) that the body needs for protein synthesis. If one of these is deficient the body cannot synthesize protein properly. This is where the concept of a limiting amino acid comes in. The limiting amino acid is the one that is in shortest supply in any given protein source. So if a protein powder has nice high levels of isoleucine, leucine and lysine but is comparatively low in histidine, once the body has used up all of the histidine it can't utilise any of the other amino acids, so these are more or less wasted. So histidine becomes the limiting IAA. It's therefore important to understand a product's amino acid profile and identify the limiting amino acid.

      • True Ileal Digestibility (TID)
        Protein is only effective if it can be digested. TID is a percentage score of how well the body absorbs various protein sources. In the world of protein supplements, casein has one of the highest averaged scores (96%) with WPI close behind (94%), while WPC (89%) and pea protein (91%) are lower. Comparatively, cooked chicken has a TID of 91% and oats 80%. Most reputable protein supplements provide excellent sources of protein and digestibility when compared to natural protein sources. But it also shows that casein and WPI that contain more protein per gram and higher quality protein correlate with having higher TID scores. So essentially you're able to absorb and use more of the higher quality protein.

      These factors combine to create a Digestible Indispensable Amino Acid Score (DIAAS) which has become the leading method for measuring protein quality on a global scale.

      There are many more studies you can dive into if so inclined but here are a couple of great summaries:
      https://www.diaas-calculator.com/diaas-information.
      https://en.wikipedia.org/wiki/Digestible_Indispensable_Amino…

Login or Join to leave a comment
Login Join