What is "paleo" to you? What were you eating? Take us through what a paleo day looks like. I am just wondering if you were going all-out and getting the pricey cuts of meat & organic everything because you can do well enough without all of that.
Thinning hair could be from any number of things. If you suffer from leaky gut, you might want to look into the Specific Carbohydrate Diet which works as a paleo elimination diet, basically. It's helpful for identifying the problematic foods. Check out SCDLifestyle.com. The intro diet is basically chicken soup, pretty affordable and easy . I'm working may way through it now and have noticed a lot of improvement with digestion (I have IBS-C/D).