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I think nuts pack a powerful punch for nutrition. Avocado. Quinoa. Fresh vegitables. Blue berries.
Fruits and veggies meat eggs grains lentils all healthy.
Nuts, whole grains, fruits and vegetables are all great...that sounds really broad, but for the most part food that isn't highly processed that is also low in fats and sugars are generally good. Portion control is also an important thing to consider!