Garlic powder is an excellent spice that should be kept on any spice rack. This can be an excellent replacement for fresh garlic. If you have ever cooked with garlic, then you know it is one of the most powerful flavors you can add to a dish, and garlic powder is much the same. It delivers a number of important nutrients, which provide various health benefits.The most important health benefits of garlic powder include its ability to lower overall cholesterol levels, improve the immune system, prevent certain cancers, and aid in digestion, among others.