* Protein supplements in pill form: These exist and are often marketed as "protein pills." They typically contain protein powders like whey, casein, soy, or pea protein, compressed into pill form. They are a convenient way to get a quick protein boost but often contain lower protein content per pill compared to protein powders.

* Individual amino acid pills: You can also find pills containing individual amino acids, which are the building blocks of protein. These are typically marketed for specific health purposes and are not a substitute for complete protein sources.

It's important to note:

* Protein pills are not a complete meal replacement. They lack other essential nutrients like vitamins, minerals, and fiber found in whole foods.

* They may not be suitable for everyone. People with certain medical conditions or dietary restrictions should consult a doctor before taking protein pills.

* It's essential to choose reputable brands and follow the recommended dosage.

If you're considering taking protein pills, it's best to consult a registered dietitian or nutritionist to determine if they're right for you and to discuss the appropriate dosage. They can also provide guidance on incorporating protein into your diet through whole food sources.