Hello,
In Living the Low Carb Life, author Jonny Bowden writes that high dose Biotin (about 9000 units - mg, mcg?) can be helpful for weight loss. I don't remember exactly how that is supposed to work, but it is also a supplement that's supposed to be good for hair and nails.
Yes, I had some hair loss, not as much as my RNY friends, but I promise it is temporary.
After I followed the supplement advice in chapter 4 of Living the Low Carb Life for a couple of months (not necessarily sticking to a low carb diet), my triglicerides had been cut in half and my HDL was way up. I don't think my Dr. necessarily believed me, but she said "Keep doing whatever you are doing."
Good luck.