If your bf% level is too low can that cause you to be cranky and tired alot of the time?
How low are we talking about here?
Give us a %.
What is low for you may or may not be low for us.
When your bf% is low, yes, some people experience fatigue.
I dunno about crankiness though, but that would make sense since some hormones are likely not functioning properly.
I am told that I have a tendency to be somewhat irritable when I'm hungry. I can't imagine why. *snicker*
Maybe that's your problem, rather than low BF.