Avocados are incredibly nourishing, as they're full of heart-heatlhy fats, which help lower bad cholesterol. The shrimp ceviche gives this dish a kick of protein: a 4-oz serving of shrimp supplies your body with almost 1 oz of protein, for as little as 112 calories! Shrimps are also a great source of vitamin D - which helps regulate the absorption of calcium and phosphorous, essential minerals for strong teeth and bones.