I'm confused about why this diet uses beans and lentils instead of other carbs. I understand the rational about preventing blood sugar spikes and insulin release, but if you google the insulin index then brown pasta and white pasta have a lower insulin and glucose index than lentils (rice and bread are higher). So what scoring system was Tim using here, aside from blood tests on himself? It seems contradictory?
The Best Answer
The name of the diet "Slow Carb Diet" comes from the fact that legumes are a "slow digesting carbohydrate" It isn't a matter of "low glycemic load" so much as keeping you full for longer. The other "low glycemic" carbs like brown pasta and white pasta are "fast digesting carbs" while they may not spike your insulin, they are converted into sugars much more quickly than legumes and from sugars into fat eventually. Plus, since they are "fast digesting" they won't stay in your system as long and then you get hungry. You're trying to make your body be LESS dependent on those fast carbs and more dependent on nourishing your body and feeling full and satisfied.
Some people have noticed on cheat days that when they start eating the white carbs/fruit/sugary stuff that it just makes them want to eat more then the cycle begins again.
Another thing to note is that beans and lentils are high in fiber. There is another book I have read, Metabolism Miracle (highly recommend it btw) and her diet (initially) is very close to SCD.
She judges things on "net carbs" or carbs - fiber.
I will say that her diet is considerably more complex which is why SCD is so nice, it may be restrictive but its very easy to understand the basic rules.
That being said, I would encourage anyone looking for a way to transition away from SCD once they hit their goal weight to read her book.