it ends up working out well with keeping your blood sugar low.
if you're familiar with the glycemic index (an index of foods and how quickly they cause blood sugar to rise after eating that particular food), you know that high glycemic foods basically overwhelm your blood sugar which, lead to storing excess body fat. Let's not get into the whole biological explanation here.
Anyway, paleo encourages healthy eating that also coincides well with the glycemic index, that is, encouraging users to stay away from high glycemic foods in favor of low glycemic foods.
candy = high glycemic
white break = high glycemic
apples = low glycemic
tomatoes = low glycemic
etc etc etc
I take Men's One-A-Day as a multivitamin, and then i do 1200mg. of fish oil 3 times a day for my joints. hope this helps