Their findings could lead to a “poo pill” that humans take to “ … promote long-term health benefits and ameliorate age-associated neurodegeneration and retinal functional deterioration.”Their findings could lead to a “poo pill” that humans take to “ … promote long-term health benefits and ameliorate age-associated neurodegeneration and retinal functional deterioration.”Their findings could lead to a “poo pill” that humans take to “ … promote long-term health benefits and ameliorate age-associated neurodegeneration and retinal functional deterioration.”