It's amazing that while beans themselves are high calorie / high carb food for farmers and laborers, bean sprouts are considered to be delicious, nutritious healthy food. Learn more about this green treat.
First, keep in mind that many sprouts you find in supermarkets are NOT from beans. Markets sell sprouts from many grains including alfalfa and wheat. You want to make sure that your bean sprouts are REALLY the sprouts from beans. These are in essence the baby bean plants that are just starting to grow. If you wanted to make your own bean sprouts, you'd stick beans in dirt. In a few days, green shoots would come up out of the soil, and those are the bean sprouts you eat.
Bean sprouts are traditionally from lentils and mung beans. They provide vitamins A, B, C and E - as well as iron, calcium and phosphorus. In essence they have everything a growing bean plant needs to live, which usually means it's great for humans, too.
1/2 cup of Mung Bean sprouts have 5.4g of carbs, i.e. 31 calories. That's not bad at all for a lunchtime meal especially considering the amount of nutrition you get. It's also nice for a crunchy side dish or stir fry. That provides 2.7g of protein.
1/2 cup of soybean sprouts are 2.7g of carbs, and 38 calories. This makes sprouts a good addidtion to any healthy diet.
How would you eat bean sprouts? Many people eat them raw, sprinkled over a lettuce salad or in fact being the main salad course. They go well with a variety of dressings and other salad fixings. Many stir fry dishes involve bean sprouts. You can wok them up with beef, chicken, pork or other meats - or have a purely vegetarian stir fry. Because they are so crispy, they maintain their water content even with a stir fry. Also they soak up sauces very nicely, becoming quite flavorful.
If you make your own bean sprouts, be sure to eat them promptly and to store them in the fridge. Remember that these are tiny little plants and the will wilt after a few days. Keep them in the crisper area of your fridge.