Keep spices and herbs away from heat and moisture. Although spices and herbs will keep for a long time if stored properly (4 years), they will lose their strength.
To tell if your spices are still fresh, just look at their color and if the color has faded, their flavor probably has faded as well.
Nutritional information is for 1/4 tsp of fajita seasoning.
Please keep in mind that nutritional information is a rough estimate and can vary greatly based on products used.