Thanks for the welcome and all the information.
PhilT wrote: "Ingestion of six grams of casein hydrolysate along with 50g of glucose did not affect glucose or insulin responses. Intake of 12 g of casein hydrolysate has a small positive effect on post-challenge insulin and glucose levels in patients with type 2 diabetes."
http://www.ncbi.nlm.nih.gov/pubmed/21570642With only 5g of glucose in total in your bloodstream it doesn't take much to change it, your 20 kcals would fuel you for about 15-20 minutes at rest.
Not aware of any research specifically about threshold intakes, sorry.
That fits with an article a websearch threw up on the
Weightology website (I haven't a clue who they are, but they seem to be quoting
PubMed). Insulin response is stronger for 675 Calorie high protein meals than the same Calorie high carb meal, even though the blood sugar response was higher after the high carb. There is only about 1.9g of carbohydrate and 1.4g protein in the milk I would take with a cup of coffee, well below the 6g protein and 50g glucose you mention. But still we don't know how the benefits of the fast period work. It may not be insulin related at all.
The big problem does seem to be a lack of information and research. The person mentioned in the book on 16hrs does it because it suits her. The book refers to better results for mice longevity, but restricted diet results for mice longevity don't seem to apply with humans.
Rufus wrote: What about simply buying better quality coffee? I get Peet's coffee here in the United States. I grind it myself and make it in a Chemex coffee maker. It tastes so good, I don't really need cream or sugar.
I have found in the past that if a café serves a really good cup of coffee, I will sometimes drink it without milk, of course it tends to be accompanied by a Danish pastry or a slice of cheese cake. Not sure I could manage even a decent cup without milk first thing on a fast day. Anyway, according to the
USDA my mug of coffee itself, without milk, is about 2 Cal
Hmm. I can get sugar free caffeine tablets online, which may suit our budget better as well. I could even shift my meds to lunchtime, as long as I don't forget them. I suppose in the absence of any real data on minimum calorie intakes during fast periods I might as well shift as much of my morning calorie intake to lunchtime. I do enjoy getting a brisk walk in the morning while I am fasting so if I can maximise any possible benefit so much the better.
Thanks. You have a great website here with loads of information D_C