There are many products in the market that are similar to the shape of protein bars, which are generally called energy bars. At first glance, the two are very confusing, and even have long been considered as the same product. But in fact, there are essential differences between the two. The energy bar focuses on its "energy". Energy can also be simply understood as heat, or more directly, a lot of carbohydrates, fat and a little protein. An energy bar can contain as much as 50-80g, or even more carbohydrates, and a lot of fat, most of which is saturated fat, while protein content is very small. Protein bars actually have their own classification to adapt to the crowd. Generally speaking, protein bars are divided into: whey protein-based protein bars, which are more suitable for eating carbohydrates after training or fat reduction; Partial energy supplement whey protein and fat supplement protein bars are suitable for people who are cautious about calorie intake. The latter is more like gaining muscle or maintaining menstruation as a food source for energy supplement. Before you supplement, you can look at the food label on the back of the protein bar, distinguish the proportion of nutrients in the protein bar, and then choose products according to your own needs. There are also low-carbohydrate protein bars with whey protein and unsaturated fat as the main raw materials, which are also suitable for individuals with special dietary needs. Soybean protein bar is not the best choice for muscle gain. As far as the domestic market is concerned, many manufacturers produce soybean protein bars instead of separated whey protein bars. In fact, domestic energy bars or protein bars are mainly made of soybean protein. This may be related to the general fitness atmosphere in China. Most people always think that plant protein will be safer and healthier and will maintain cardiovascular health. It is true that soybean protein is a good choice as a daily protein supplement, and it does have a certain protective effect on the cardiovascular system. However, whey protein is still the best choice from the point of muscle gain pursued by fitness. Compared with soybean protein, whey protein has higher leucine content. Leucine is the most important essential amino acid for muscle growth among the three branched-chain amino acids. In other words, it is not that soybean protein bars are not good, but whey protein bars are more suitable as the first choice for muscle building. If your purpose is only to supplement the daily protein, soy protein bars are a good choice. The carbohydrate in protein's bar may be sugar alcohol or other generations. Some friends who are in the fat-reducing period may be particularly concerned about the carbohydrate content in a protein bar. Sometimes, the calories are not high, but somehow they contain some carbohydrates, but they don't seem to be included in the total calories. Will these carbohydrates affect your fat loss? Don't be nervous. Maybe the manufacturer added xylitol, stevia or aspartame or other sugar substitutes or natural sweeteners to the protein bar. These are sugar substitutes, which can hardly be absorbed by the intestine, so the calories can be ignored and will not affect blood sugar. Please feel free to use them. In addition, a few protein bars will also add some dietary fiber, which may also be counted as carbohydrates. However, dietary fiber is even more worrying because it cannot be absorbed by the intestine at all. Finally, it is worth mentioning that you will find some protein bars so sweet that you wonder whether the calories of this protein bar exceed the standard! Don't worry, many times, it is actually the reason for replacing sugar. Sugar substitutes are often hundreds of times sweeter than real sucrose, which will make your taste buds have an illusion. As long as you read the information on the food label carefully before eating, you won't go wrong.