I have mousy brown hair and I started highlighting it a couple of years ago. Best thing I ever did, it brightened my face right up. Definitely a good thing to go with the weight loss.

I highly recommend foil highlights rather than the cap ones, and preferrably more than one shade of blonde, to look more natural. My stylist uses 4 shades. I just recently got her to switch from 10 volume to 20 volume bleach and I like it even more.

Go for it!