At the end of the day, any smoothie is going to taste better and will be more nutritious the fresher it is! Chlorophyll (the green pigment found in leafy greens) can actually keep your smoothie alive longer, up to 48 hours.eal your container nice and tight and store in the refrigerator. Please note that the taste and colour of your smoothie will be different from when you initially made it. TIP! Try adding lemons or fresh lemon juice to your smoothies.