The only other natural substances which can substitute for up to 60 percent of the nervous systems glucose requirements are ketone bodies.
(The only other natural substances; can substitute; for up to 60 percent of the nervous systems glucose requirements) (The only other natural substances which can substitute for up to 60 percent of the nervous systems glucose requirements; are; ketone bodies)
The only other natural substances The only other natural substances which can substitute for up to 60 percent of the nervous systems glucose requirements
can substitute are
for up to 60 percent of the nervous systems glucose requirements
ketone bodies