I remember feeding this to my son when he was still a baby on toast, this is why us Aussies love the stuff we eat it from a very young age. They used to make Vegemite in Melbourne and I remember as a young guy driving past the factory thinking it must be like some salty Willy Wonka factory!
Maybe you should go see someone… a cardiologist or something. But an Aussie one.
ETA: Re-reading… “keep nerves at bay”-- what the heck does that mean? To me, keeping something at bay means keeping it at a distance. Keep your nerves at a distance? Is it possible this caption was not written by a medical professional?
Not perzackly. More like restraining a threatening hostile force from injuring. A dog straining on his leash to tear your nuts off is “at bay”. Unless the leash breaks. Then, he isn’t.