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25 Best Smoothie Ingredients

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9. Kale – Improving Your Eyesight

Kale contains a high density of nutrients including potassium and Vitamins K, A and C all coming in at under-35 calories. If you add raw kale, 1 cup in your smoothie will give you the benefits of antioxidants like lutein that keep your eyes protected from oxidative damages as well as fight off macular degeneration.

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