I took very low dose test. for an extended period of time (about 5 months). However, it was transdermal. I was taking the equivalent of about 2.5 mg daily. Allowing for about 40% loss, that would be about 1.5 mg daily.
I stopped taking it when I shed a substantial amount of hair, seemed at least one third. It was an overall thinning so it's really only noticeable to me. It has not grown back and that's been over two years. Now, female pattern baldness runs in my family anyway, and I never had the greatest head of hair to begin with but I won't use test. like that again. I use it transdermally after ovulation until the beginning of my period, it keeps my cycle more regular.
It caused very subtle but permanent changes in my voice, which is a pinch deeper (my husband is aware of it, I've noticed I sing much better), I permanently carry more overall muscle mass and I have terrific muscle memory, if I slack off from the weights even for several months I'm back to where I was within six weeks or so. I do think I'm also "thicker" which isn't necessarily something I wanted (I'm also struggling with trying to lose weight and coming to the conclusion I probably have some thyroid issues so you can't use me to judge by in that regard).
Emotion wise, the main thing I noticed was that when I was using it, and I really was trying to take a physiologic dose, I was overall in a more pleasant mood and little shit was a lot easier to laugh off, but I would also have an extremely short temper.
50 mg of test. every 10 days is NOT a low dose for a woman, think more in the range of 10 mg a week, seriously. 50 mg/week is half the dose a man on HRT is on.