good oils actually help the body maintain ideal weight. If she really wants to lose weight, have her do 2-4 liver flushes, she'll start metabolizing all the extra stored fats in her body in no time! :) Have her read:
www.liverdoctor.com for more info on how liver is key to weight loss.
It's possible to overdo any good thing and make it be bad. As long as she listens to her body, watches out for digestive complaints or skin issues, she'll be just fine! :) It may help to take digestive enzymes.