If past experience is a guide, most of the new products Roche has licensed may fail to prove both safe and effective in humans.

FORBES: Roche Goes For Early Stage Biotechs

Dr. Snyder believes D-serine is there as a fail-safe to make sure memory cells spring into action only when they are supposed to--a process that breaks down during a stroke.

FORBES: Repairing The Brain

Snyder believes that D-serine is there as a fail-safe to make sure that memory cells spring into action only when they are supposed to--a process that breaks down during a stroke.

FORBES: Repairing The Brain