Protein products or shakes are not only the source of protein, there are several ways you can easily get the required amount of protein through diet alone.
Milk
Milk is one of the best sources of protein and other beneficial nutrients. 100 ml of milk contains 3.4g of protein.
Eggs
Eggs are versatile and easily available food. They are rich in protein. One boiled egg contains 6g of protein.
Fish
Fish is an excellent source of protein. 100g of tinned tuna contains 23.5 grams of protein.
Chicken Breasts
Chicken breast is also an excellent source of protein. 130g of grilled chicken breast contains 31 grams of protein on average.
Peanut Butter
Peanut butter can be a very useful way to add an extra protein to your diet. 100g of meridian peanut butter 29.5 grams of protein.
These are a few alternatives to protein shakes. This is something more natural and has less adverse health implications in the long run.