75% of the Vitamin A from my multi-vitamin is from Beta-carotene.

And that makes up the majority of my Vitamin A, so I guess I don't have to worry about that anymore.

I doubt I have a thyroid problem, but luckily I just got some blood work done which will check for thyroid issues.

Fridayeyes...do you know of any other vitamins (in excess) that will cause hair loss?

Besides Vitamin A, I've also read of Vitamin E, selenium and iron. But, again...the question is always how much is too much? I'd preferably like to know in daily value percentages.