Quick answer: Per4m Advanced Whey is the whey-focused option, while Advanced Protein Blend combines whey with milk, egg and casein proteins. The better-value size depends on the tub you compare, so formula, flavour and cost per serving all matter.
If you're choosing between Per4m Advanced Whey and Advanced Protein Blend, the answer depends on which size you're comparing and what you actually want from the tub.
At the smaller end, Advanced Whey 900g is £34.95 for 30 stated servings, or roughly £1.17 per serving. The Advanced Protein Blend 800g is cheaper upfront at £29.95, but with 24 stated servings it works out at roughly £1.25 per serving.
For a larger tub, the 1.8kg Protein Blend is the stronger current buy: £48.95 for 54 stated servings, or about 91p per serving. The outgoing 2010g Advanced Whey works out at about 94p per serving at £62.95, but it is currently sold out.
So where does the value come from?
There isn't one winner across every size. If you want the lower upfront spend, the 800g Blend costs less to get started. If you're comparing the smaller tubs by cost per stated serving, the 900g Advanced Whey currently comes out lower.
Move up to the larger formats and the 1.8kg Protein Blend is currently the more attractive option because it combines the lowest cost per stated serving in this comparison with actual availability.
Want to compare more options? Browse our protein range.
Prices checked 23 September 2026. Prices and availability can change, so check the current figures before ordering.
What's actually different in the tub?
Advanced Whey is Per4m's whey-focused range. Its current 900g product uses whey protein concentrate and whey protein isolate and provides 21–22g of protein per serving depending on flavour.
Advanced Protein Blend takes a different approach. Its protein blend includes whey concentrate, skimmed milk powder, egg white protein, milk protein concentrate, micellar casein and whey isolate, with 20–21g of protein per stated serving depending on flavour.
That makes the choice more useful than simply asking which tub is cheaper. If you specifically want the established Advanced Whey formula, choose on that basis. If you're open to the multi-source Blend, compare the size and price that suits how often you'll use it.
Is Per4m Advanced Protein Blend the same as whey?
No. It contains whey concentrate and whey isolate, but it also contains milk, egg white and casein proteins. Advanced Whey is the more whey-focused formula; Advanced Protein Blend is a multi-source protein powder.
What about flavours?
This is where we'd stop looking at the calculator for a minute. A tub isn't good value if you don't actually want to drink it.
Advanced Whey has the much larger flavour history. Protein Blend currently has 12 flavours, including Caramel Biscuit, Carrot Cake, Cherry Cola Float, Chocolate Brownie Batter, Cinnamon Donut, Cookies N Creme, Sticky Toffee Pudding and White Chocolate Hazelnut.
If you're unsure, buying the smaller format first can make more sense than chasing the lowest possible cost per serving on a bigger tub.
The Advanced Whey size change matters
Per4m has indicated that Advanced Whey is moving from the current 900g and 2010g formats to 810g and 1.8kg tubs. Until the replacement sizes are actually available with confirmed prices and serving counts, we wouldn't use guessed future figures in the comparison.
For now, the numbers above compare the products and sizes you can see in the current range, with the sold-out 2010g Whey clearly separated from the sizes currently available.
Which should you choose?
For a smaller tub: choose between the 900g Advanced Whey and 800g Protein Blend based on formula, flavour and upfront budget. Advanced Whey currently costs a little less per stated serving; the Blend costs less at checkout.
For a larger tub: the 1.8kg Protein Blend is the straightforward current option in this comparison while the 2010g Advanced Whey remains unavailable.
You can browse the full Per4m range and compare the current flavours and sizes before deciding.
