In most cases, it is often best to meet your daily nutritional needs through actual, natural food sources. It is not always possible for some people to meet those daily needs. Yes, whey protein is a natural source of protein from milk, but many protein supplement brands contain other ingredients that may not be so natural.
This is why it is important to use high quality whey protein supplements. I like using the Slender Blend protein supplement I learned a lot about at https://eliteworkoutreviews.com/protein-world-slender-blend-review/. I’ve tried a lot of protein brands and I really like this one because of the added minerals and vitamins, plus, I noticed improved recovery times after my workouts.