Protein · head-to-head

PhD Diet Whey vs Applied Nutrition ISO-XP.

Our independent head-to-head review of PhD Nutrition Diet Whey Protein Powder 1kg and Applied Nutrition ISO-XP 1kg, scored on value, protein density, macros and ingredient quality so you don't have to guess which to buy.

WheyWise verdict
Applied Nutrition ISO-XP 1kg wins for most buyers.

90g protein per 100g - highest in its class

Near-zero carbs and fat for clean macros

Best value per gram of protein on Amazon

Ingredient quality

Ingredients, line by line.

Every ingredient on each label, classified. Approved means nutritionist-positive sources or actives. Neutral is functional (binders, anti-caking, flavouring). Watch flags additives many buyers want to limit.

ApprovedNeutralWatch
PhD Nutrition Diet Whey Protein Powder 1kg
7 Approved
4 Neutral
12 total
Applied Nutrition ISO-XP 1kg
2 Approved
2 Neutral
1 Watchlist
5 total
PhD ingredients
12 total
  • Whey protein concentrate (milk) (75% of blend)
  • Soya protein isolate
  • Milk protein concentrate
  • CLA (conjugated linoleic acid) powder
  • Acetyl L-Carnitine
  • Green tea extract
  • Golden brown flaxseed powder
  • Waxy barley flour
  • Acacia / guar / xanthan gum (stabilisers)
  • Lecithins (emulsifier)
  • Salt
  • SucraloseWatch
Applied ingredients
5 total
  • Whey protein isolate (milk) (≈97%)
  • Sunflower lecithin (emulsifier, soy-free)
  • Fat-reduced cocoa powder
  • Flavouring
  • SucraloseWatch
Chocolate variant; soy-free formulation across flavours (sunflower lecithin only).