How do I prevent memory loss?

"Vitamin B-12 helps maintain healthy nerve cells and red blood cells. Vitamin B-12 deficiency — most common in older adults and vegetarians — can cause various signs and symptoms, including memory loss. In these cases, vitamin B-12 supplements can help improve memory."
Source: mayoclinic.org

What is the best way to become stronger faster?

"Creatine improves strength, increase lean muscle mass, and help the muscles recover more quickly during exercise. This muscular boost may help athletes achieve bursts of speed and energy, especially during short bouts of high-intensity activities such as weight lifting or sprinting."
Source: webmd.com

Is whey a good protein powder?
"Numerous studies show that it can help you increase strength, gain muscle and lose significant amounts of body fat. However, whey is more than just protein. It contains many other nutrients, some with potent biological effects. In fact, it's one of the best-studied supplements in the world."