Regarding the slit-like sores in the corner of the mouth........I was
bothered with tiem a lot in the mid 90's. My dentist thought they were
a fungus and gave me some ointment which didn't help.

I happened to have one when I went to my internist for my yearly
physical. I probably wouldn't have thought to mention them otherwise.
He said he didn't know, but he'd look them up. He came back in and said
it was a ribofavin defeciency (I think that's B1, but I'm not sure).
Anyway, as long as I take my B-complex caplet daily, I haven't been
bothered with them since I hate taking them, but it's worth it to me
not to have them or nocturnal leg cramps anymore.

Libby