I have done refeeding with great success, but after a couple months it becomes somewhat bothersome gaining and loosing weight every week. Refeeds are normal tool used by body builders to get very low body fat. Nice way to shake things up once in a while anyway. I initially found about Leptin in these forums.

For more about Leptin have a look at:

http://www.theministryoffitness.com...s/article18.htm

Go to www.avantlabs.com and search for Leptin