I heard it on the HS show and Howard was asking her how she did it - and she said she fasted for 21 days out of the month for 3 months. That leaves 7-10 days between each fast I'm guessing. I was in awe that she lost so much weight in 3 months.
You're right though - she did it for health purposes and said she's never felt better in her life! What a testimony!