So grateful for the chance to ask this of Dr. Fung and Megan Ramos!
I am T2D, 45 year old female, not taking any medications. I lost 20 pounds or so since starting keto in April, but have been pretty much stalled for the past couple of months (lose a little fasting, gain it back between fasts). I could still stand to lose 100 pounds. Through a recent glucose/insulin challenge test, my doctor confirmed I do have Type 2, not Type 1 diabetes. My fasting insulin at the start of the test was 20.4, rising only to 24.4 at 1 hour and 27.4 at the two hour mark. My fasting bg was 259, going to 323 at the 1/2 hour, 410 at the 1 hour, and 420 at the 2 hour. My c-peptide was 4.56 ng/mL.
Eating keto alone, without incorporating fasting, leads to my having blood glucose numbers in the 300s. Fasting knocks my bg readings down quickly, sometimes 100-point drops (or more) over the course of a day (I typically have my highest bg when I wake up, and lowest by late afternoon).
It takes about 5-7 days of fasting (water, pink salt, two servings a day of a sugar-free b-vitamin/caffeine drink called Berocca) to get into the low 100s or a little lower than 100. After breaking the fast, I have about one day of those lower bg readings but inevitably they start climbing back up over the keto eating days, even though I am trying to follow Megan’s advice to eat during only one or two 90-minute eating windows within an 8 hour period. If I eat on 5 days in a row or more, I typically hit the 300 bg mark. There is some improvement overall (low 300s rather than high 300s before I started doing a lot of fasting), but it is discouraging seeing the blood glucose keep going back up.
How long and/or how often should I fast to get to a point where my blood glucose stays in a normal range on eating days? I have done several 2- and 3-day fasts, a few 4- or 5-day fasts, and one 7-day fast over the last couple of months. (During August I had more fasting days than eating days.) Should I look into a much longer (medically supervised) fast in order to get lasting results?
Thank you for helping so many people heal.