Why does your saliva start to taste like blood if you ride your bike up a hill or run fast for a while?
Edit: Thanks for the Awards and the nice Comments.
Also blew up bigger than I thought!
In: Biology
Since there are 397 comments here, I assume no one will ever see this.
The top answer is wrong. It has to do with the decreased blood pH from retained CO2.
The effect is a known symptom of patients with metabolic acidosis for instance. It is also a warning sign when free-diving. Obviously there is nothing moving into your mouth when you are underwater.
You can taste it yourself if you hold your breath for 90 seconds.
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