Easy to Digest Protein Powders

Most protein-powder bloating traces to two things on the label: lactose (abundant in whey concentrate, minimal in whey isolate) and certain additives. This list includes only powders whose lead protein is a whey isolate, whey hydrolysate, milk protein isolate or a plant isolate (the formats lowest in lactose by design), ranked by protein per 100 calories. Each product page shows the full ingredient list, including any thickeners or sweeteners you may personally want to avoid.

Rankings recompute automatically as new verified products are added. Tap a column to sort; product lines with multiple flavours show their best scoring flavour.

#Product
1Isopure Zero CarbIsopure Zero Carb6 flavours25g10025g0g0g
2Optimum Nutrition Gold Standard 100% IsolateOptimum Nutrition Gold Standard 100% Isolate2 flavours25g10025g≤1g0g
3Ascent Native Fuel WheyAscent Native Fuel Whey12 flavoursvaries by flavour25g11022.7g≤1g0g
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4Dymatize ISO100Dymatize ISO10014 flavours25g11022.7g≤1g0g
5Isopure Low CarbIsopure Low Carb3 flavours25g11022.7g0g≤1g
6Naked Nutrition Naked PeaNaked Nutrition Naked Pea5 flavoursvaries by flavour27g12022.5g2g0g
7PEScience Select ProteinPEScience Select Protein13 flavoursvaries by flavour24g11021.8g≤1g0g
8Quest Protein PowderQuest Protein Powder6 flavoursvaries by flavour24g11021.8g≤1g0g
9Body Fortress Super Advanced IsolateBody Fortress Super Advanced Isolate2 flavours30g14021.4g0.5g0g
10Premier Protein 100% Whey Protein PowderPremier Protein 100% Whey Protein Powder5 flavours30g14021.4g≤1g≤1g

Why isolates digest more easily

Whey concentrate can be up to 8% lactose; whey isolate is filtered to under 1%, and hydrolysates are pre-broken into smaller peptides. For the lactose intolerant majority of adults worldwide, that difference is usually the whole story. Plant isolates (pea, soy, rice) contain no lactose at all, though some people find certain pea proteins cause their own gas; individual results genuinely vary.

Additives worth checking

Beyond lactose, common culprits people report include sugar alcohols, inulin/chicory root fiber, and some gums and thickeners (like carrageenan or cellulose gum). We list every ingredient verbatim on each product page so you can screen for whatever your gut disagrees with.

How this ranking works

  • Every nutrition value is transcribed from the manufacturer’s published nutrition label and verified by hand, with no third party food databases.
  • Product lines are ranked, not individual flavours, so one product’s 20 flavours can’t fill the list. Each entry shows its best scoring flavour.
  • A maximum of two lines per brand keeps the list diverse.
  • Labels that don’t state sugar or fiber are treated as unknown (never as zero) and are excluded from sugar and fiber rankings.
  • Want to hit a daily protein target? The Protein Pal app lets you scan any label and track your protein day by day.

Frequently asked questions

Why does protein powder make me bloated?
The usual suspects, in order: lactose in whey concentrate, sugar alcohols or added fibers in the flavouring system, and drinking a large serving quickly. Switching to an isolate led powder (this entire list) removes the most common cause. If symptoms persist, that’s a clinician conversation, not a shopping problem.
Is plant protein easier on the stomach than whey?
It removes lactose from the equation entirely, which helps many people. But legume proteins bring their own fermentable components, and tolerance is individual. Both isolate types on this list are reasonable starting points.

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