To keep basil fresh, trim the stems and place them in a glass or jar of water, just like cut flowers. Loosely cover it with a plastic bag and leave it on the counter. Although certain herbs, such as parsley and cilantro, can be stored this way in the fridge, basil does better at room temperature.
Here is the most notable nutrient content of 1 tablespoon (around 2 grams) of sweet basil
Calories 0.6 (5 fresh leaves, chopped)
Vitamin A 3% of DV
Vitamin K 3% of DV
Calcium 0.5% of DV
Iron 0.5% of DV
Manganese 1.5% of DV
Basil also supplies beneficial plant compounds that have antioxidant, anti-inflammatory and other health properties.