Soy isn't just for skinny jeans-wearing hipsters. The muscle-building properties of this remarkable bean have made soy-infused protein bars a staple of weight rooms, gyms, and exercise centers around the nation. Bodybuilders and exercise enthusiasts know that soy provides an excellent source of protein to help them recover after workouts and to grow muscle mass. What they may not know is that energy bars containing soy protein also have lots of other nutritional benefits. Food manufacturers make soy protein powder by stripping most of the fat and carbs from ground soybeans that have been dried. The end product is a protein-filled supplement incorporated into many snack and workout bars popular among bodybuilders and athletes. Soy has a remarkable protein content. Just one serving of soy protein powder carries about half your daily requirement of protein, providing plenty of amino acids your body requires for building and keeping muscle. 
In addition to its robust protein content, soy also offers the following nutritional benefits:
- Fat - Keeping a close watch on fat intake is important for professional bodybuilders and average Joes alike. Soy protein is very beneficial from a fat standpoint. One 28 gram serving of soy protein powder has just 0.9 g of fat. Of that fat, only 0.1 g of it is saturated fat – the unhealthy type of fat – while the remainder is unsaturated fats – the heart-healthy version.<1>
- Vitamins & Minerals - Soy protein contains a tremendous amount of the vitamins your body needs. Soy protein powder has 12 percent of the daily recommended amount of folate, as well as small amounts of thiamine, riboflavin, niacin and vitamin B6. Soy protein is also rich in minerals, providing 25 percent of the daily recommended dose of iron, phosphorus, copper, and manganese. Soy protein also offers between 1 and 8 percent of daily zinc, potassium, and magnesium requirements.
- Sodium - One thing consumers of soy-based protein bars will need to keep a watch on is their overall sodium intake. A single serving of soy protein powder carries about 12 percent of the daily allowance for sodium. Exercise enthusiasts will need to watch their diets carefully to avoid consuming too much sodium.
- Carbohydrates - While much of soy protein powder's carbohydrate content is stripped out in the manufacturing process, it still contains some carbs. A serving of soy protein powder has about 2.1 g of carbohydrates. The vast majority of soy protein powder's carbohydrate content consists of dietary fiber.
As you can see, soy protein products don't just give you the protein you need to build and maintain muscle, they also provide other essential nutrients. Combined with a carefully planned diet, soy protein can be vastly helpful in allowing you to achieve your fitness goals.
Promax Nutrition gives people who want better bodies the natural protein, vitamins, and minerals they need in delicious, gluten-free, vegetarian protein bars. Promax has a wide range of delicious products, with one sure to please any palate.
Source: http://www.livestrong.com/article/273608-soy-protein-powder-nutritional-facts/