BModerate evidence, real but modestOther
The short answer
Food, not magic. A convenient way to hit a protein target that meat, dairy, eggs and pulses would also hit.
Who this is actually for
People who struggle to reach their protein intake from food, particularly older adults and people training seriously.
What it is legally allowed to claim
Nothing. There is no authorised EU health claim for this substance, so any packet promising a specific benefit is making a claim it is not entitled to make. That is worth knowing before you judge the price.
How much is too much
No upper level. Total daily protein matters, not the source.
Cautions and interactions
Contains milk protein, so unsuitable in cow's milk allergy. Lactose content varies by form.
Ask a pharmacist before you start anything. Interactions with prescribed medicines are the most common way supplements cause harm, and they are easy to check. Bring the actual packet, or a photo of the ingredients panel, because doses and forms vary enormously between products. Nothing here is a substitute for advice about your own situation.