Soy milk is a plant-based drink made from soybeans. It is a good source of protein and calcium, and it is also low in saturated fat and cholesterol. Unsweetened soy milk is a good choice for people who are watching their calorie intake or who are lactose intolerant.
Here are some of the nutrients found in a cup (300ml) of unsweetened soy milk 
Calories: 80
Protein: 7 grams
Fat: 4 grams
Carbohydrates: 8 grams
Fiber: 1 gram
Sugar: 6 grams