Life Extension MacuGuard Ocular Support with Saffron offers a proprietary blend of nutrients that mimic the body's natural ratios of lutein, zeaxanthin, and meso - zeaxanthin. (drvitaminsolutions.com)
In addition to using only fresh, regional ingredients, Acana follows whole prey meat ratios in their dog foods which consists of fresh meats, organ meats, bones, and cartilage to deliver fresh, wholesome nutrient in natural ratios. (pawster.com)