Quote:
Originally Posted by Built
Edited to add: the reason I stay lower while in keto ratios is to keep the fats high enough so that I stay in ketosis - for me, usually about 65% of cals from fat. If I eat too much protein, some of it glycolyzes and stimulates an insulin response. For keto dieting, this is particularly problematic with faster proteins, such as whey, especially if I take it with nothing to slow it down, such as fibrous veggies and sufficient fat.
|
I feel compelled to correct this.
1. Fat intake has nothing to do with getting in, or staying in ketosis. Ketosis is a function of liver glycogen, and occurs in the absence of carbs, not the presence of high fat. Ketosis is metabolically similar to starvation actually, where obviously no dietary fat is being consumed.
2. Too much protein will in fact keep someone out of ketosis. I am not sure where the term 'glycolyzes' comes from, but suffice to say, there is generally a 58% conversion of protein to sugar. Once the nitrogen containing side chains are cleaved, you're simply left with a carbon skeleton, which has to be either stored or oxidized for energy. It is not in fact the insulin response that triggers the problem as the production of too many ketones also triggers an insulin response to prevent too large an increase in blood acidosis. It is simply the production of sugar, which decreases the need for ketone/fractured fat production.
3. I also don't see how a fast acting protein, like whey, is more problematic for ketosis. Again, it is the status of your liver and blood sugar that govern the production of ketones. Egg whites are also a very fast digesting protein. And all proteins stimulate an insulin response.
And as an aside, more specific to carbs, and adding things like fat/fiber to 'slow it down', this is the premise of the glycemic index which basically says that the addition of these things slows down digestion and results in more of a trickle effect of sugar entering the blood. While true, the GI says nothing about the insulin response, just the rate of entry. A more accurate measure is the insulin index, which is a measure of the insulin response. And what might be surprising is that while adding fat to something slows it down, it also increases the insulin response.