Natrol Extra Strength Cognium is powered by a silk protein hydrolysate that is the #1 most clinically studied ingredient for memory among leading brain health supplements. Multiple human clinical studies show statistically significant improvements in memory and concentration. Additionally, Extra Strength Cognium enhances mental agility by improving focus, learning and attention. Natrol Extra Strength Cognium keeps your mind sharp and your memory strong #1 fastest growing brain health brand #1 most studied ingredient for memory among leading brain health brands Clinically proven to improve memory and concentration Enhances mental agility by improving focus, learning and attention Safe and stimulant free Results in as little as 4 weeks Support your brain with Natrol Extra Strength Cognium, the smart choice in brain health.