This includes the antioxidants lutein and zeaxanthin, which help protect eye health . That's because animals that eat grass produce meat with higher amounts of omega-3 fats, conjugated linoleic acid and antioxidants than meat from grain-fed animals . One study in older women found that consuming a diet high in fatty meat led to HDL cholesterol levels that were 8% higher than on a low-fat, high-carb diet . Fresh meat and poultry contain no carbs and are rich in B vitamins and several minerals, including potassium, selenium and zinc . In one study, when people consumed a diet high in avocados, they experienced a 22% decrease in "bad" LDL cholesterol and triglycerides and an 11% increase in "good" HDL cholesterol .