No. 1 Sports Nutrition Meat Snack. NATURE'S FOOD PROTEIN: If you're looking for a great tasting, moist, real meat protein from nature, eat OSTRIM! OSTRIM high-protein meat sticks are USDA inspected, guaranteeing you a true and correct nutritional profile of quality and wholesomeness. OSTRIM, nature's food protein, surpasses the protein sources found in many sports nutrition products. OSTRIM is also a good source of potassium and a good source of iron.