How do I choose a protein isolate?

Compare the protein source, protein per 100 g and per serving, flavour and allergens. The word “isolate” alone does not confirm lactose-free status.

Start with the full ingredients: an isolate may be whey-based or plant-based, and a finished blend may contain additional ingredients. Check the selected flavour rather than another variant.

If lactose or sugar matters, look for an explicit label statement and the relevant nutrition data. Compare pack weight, servings and preparation instructions.