Protein powder is known to be taken as post workout shakes. Protein powder comes in various forms like whey and soy. A milk or water-soluble protein that helps to gain required nutrition like all essential amino acids and proteins. Generally, soy protein is preferred by vegetarian people. Protein powders are an easy way to gain the benefits of proteins as a post-workout supplement.

Protein powders can be taken by growing teenagers to have as a post workout drink as the body is still in a growing phase and needs sufficient nutrition.
If you are working on building muscles then the protein required by the body is more which we can obtain from protein powders.
While injured like athletes who have sports injuries need a good quantity of protein to recover faster.
If you are a vegetarian and miss out important protein sources like meat, chicken, eggs from your diet than relying on protein powder supplements is the best and healthy option. Thanks!