No. This product is not soy free as it lists 1 ingredient that contains soy.

Is On Optimum Nutrition Serious Mass Vanilla Flavored Protein Powder Supplement Soy Free?

No. This product is not soy free as it lists 1 ingredient that contains soy.
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Ingredients

Maltodextrin, Protein Blend (whey Protein Concentrate, Calcium Caseinate, Egg Whites, Sweet Whey), Natural And Artificial Flavor, Medium Chain Triglycerides, Lecithin, Acesulfame Potassium, Sucralose. Contains: Egg, Milk, Soy.

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About this product

Protein Powder · Powder

Flavor
VanillaSweet
Texture
Powdery
Commonly used for
DrinkingMeal PrepOn The Go
Soy Free? On Optimum Nutrition Serious Mass Vanilla Flavored Protein Powder Supplement | Spoonful