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Home / Rankings / Protein Powders / Soy Protein Isolate Powder vs Casein Protein

Head to head

Soy Protein Isolate Powder vs Casein Protein

Soy Protein Isolate Powder costs less per gram of protein (by 29%). Soy Protein Isolate Powder has the higher overall composite score.

BULKSUPPLEMENTS Soy Protein Isolate Powder Protein Powders 9.8Composite / 10 Full record → RULE 1 PROTEINS Casein Protein Protein Powders 9.1Composite / 10 Full record →
MeasureSoy Protein Isolate PowderCasein ProteinBetter
Composite score9.819.06Soy Protein Isolate Powder
$ / g protein$0.035$0.050Soy Protein Isolate Powder
Protein per serving25 g25 gTie
Dose integritynot enough datanot enough datanot enough data

Nothing is re-scored for this page. Both products carry the same composite they carry on the Protein Powders ranking, computed against that whole category rather than against each other — a head-to-head cannot change what a label says. Where a measure is missing on one side it is shown as missing, never counted as a loss. See how we rate.