An Analysis Found Only Two of Seven Whey Products Reported Zero Lactose
Whey protein is made from milk serum, which naturally contains lactose. The degree of filtration affects the amount that remains: concentrate generally retains more fat, carbohydrates and lactose, while isolate undergoes further processing and contains less of each. Hydrolysis breaks proteins into smaller components but does not remove lactose.
Among the seven products examined, Body Action Isolate Prime Whey and Adaptogen Tasty Iso Whey stated that they contained no lactose. The Adaptogen declaration applied only to its Original flavour. The remaining five products lowered the lactose content but did not bring it to zero.
Brazilian labelling rules allow products described as “zero lactose” to contain a very small residue. The review therefore treated the wording on the allergen statement as important rather than assuming that a commercial description meant complete absence. That statement is generally located near the ingredients list.
Branding can provide a different impression. Integralmédica Iso Triple Zero uses “Triple Zero” in its name, but the three zeros refer to sugar, fat and gluten. Its allergen information says that the product contains lactose. The review also found advertisements using “lactose free” when the package wording stated the opposite.
The quantity left after processing was rarely given. Puravida Protein Isolado was the only one of the seven products to specify it, reporting 0.4 grams of lactose per serving. Where a label only says that lactose is present, its nutrition table can provide an estimate because lactose is included among sugars. A serving with less than 1 gram of sugars contains no more than that amount of lactose.
Preparation changes the final drink. Mixing whey with ordinary milk adds the milk’s lactose, whereas water, lactose-free milk or a plant-based beverage does not add lactose from regular milk. Lactose-free whey remains a milk-protein product and is not intended for people with an allergy to milk protein, which is distinct from lactose intolerance. Several isolates also contain soy derivatives, which are listed in the allergen information.
