Eli5 Why does saliva taste like blood when you exhaust yourself?

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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

14 Answers

Anonymous 0 Comments

Oh god I figured it was just because I’m a weakling. The two people I’ve ever mentioned it to said it never happened to them.

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