Insects do not have to be cooked for livestock feed, especially if they are dried quickly. However, they turn black due to enzymatic action. To inactivate enzymes and prevent this issue, insects are blanched in 95°C water for 1 min [61].Commercial insect proteins are also used for human food. The most common products consist of finely ground dry insects, which have been oven dried and roasted. Generally, no stabilizers or antioxidants are added. These types of powders are fairly stable and can be stored dry at refrigerated temperatures for a long period of time. Other, more sophisticated products consist of extra fine powders produced by spray drying of pasteurized liquefied insects. These are vacuum packed and tend to be less stable. Once the package is opened, it may oxidize and turn black. However, these powers can be safely stored at freezing temperatures [62]. Whole insects can also be preserved by freezing and some companies sell them whole frozen or dry.