You can also search for a protein bar brand on the internet, or browse the protein bar reviews in the US or UK.
I am NOT a nutritionist and I don't have the qualifications to provide nutritional advice. All I have written about is protein bars.
It is important to keep in mind that the protein you purchase comes from animals. Most of the time, protein bars come from the animals you slaughter to feed to your pets. Many people are very concerned about the use of animals in the manufacturing of protein bars. In order to get the most nutrition from a protein bar, the animals are raised and slaughtered in a humane manner.
The USDA (United States Department of Agriculture) has established minimum standards for the care and treatment of farm animals. These standards cover the following areas: humane handling, housing, health, nutrition, slaughtering, waste management, and slaughter and processing.
Many people who are concerned about animals use the "humane" option, and don't look beyond the label. But they may be surprised to learn that this can mean different things for different people. Some may think it is acceptable to buy protein bars labeled "humanely raised" if they also buy animal products, for example, milk and cheese.