Hi Michelle,
if you can spare 17 mins, this is a very good Youtube lecture on the basic medical facts:
https://www.youtube.com/watch?v=x9-OkTOq-n0
and this is a readable interview with one of South Africa's leading sports scientists who has moved over to pushing the medical benefits of LCHF eating.
http://www.biznews.com/health/2015/01/19/complete-idiots-guide-tim-noakes-diet-banting-lchf/
B.