Note: All services in AngularJS are singletons. That means that the injector uses each recipe at most once to create the object. The injector then caches the reference for all future needs. Since a Factory is a more powerful version of the Value recipe, the same service can be constructed with it.
A healthy serving size is about 1 to 2 walnuts, per day. To add these wonder nuts to your meal, chop them in your whole grain cereal or make your own walnut butter by blending a few of them with some honey and cinnamon if you wish.
Walnuts are a good low-carb food. Like peanuts and almonds, walnuts provide protein, fat and fiber with relatively few net-carbs per serving. For instance, a quarter cup of walnuts has two grams of net-carbs (four grams of total carbohydrates minus two grams of fiber). Some people find walnuts bitter. I admit I prefer the taste of roasted almonds and peanuts, and seldom eat walnuts as a stand-alone snack. The big drawback to walnuts is cost.