Mirka kirjoitti:
Ei kai kroppa proteiinieja käytä energiaksi mielellään, jos on hiilareita tai rasvaa saatavilla? MOntyn idea meni minusta niin, että kroppa käyttää tällöin hiilareita, jolloin syöty rasva kertyy tarpeettomana ja hiilarin kohottaman insuliinin ohjaamana läskiksi. tämähän on silkkaa faktaa? Mitäs epätieteellistä tässä on? Lisäksi tuota yhdistelmä-ajatusta tukee se, että insullinimittauksissa hiilihydraattien insullinivaste nousee huomattavasti korkeammalle, jos ne nautitaan yhdessa rasvan tai proteiinin kanssa, eli nämä lisät nostavat insuliinia, vaikka laskevatkin glukoosia. Mikä on käytännön merkitys, en tiedä, mutta minä en ole nähnyt vielä mitään kättä pitempää (muuta kuin halveksivia asenteita), mikä oikeuttaisi pitämään Montyä epätieteellisenä. Kaloriteorian kritiikistä voisi löytyä jotakin, samoin tuo hedelmien käyttäytyminen ruoasulatuksessa epäilyttävät, mutta eivät ne ole niin kauhea keskisessä asemassa. Kertokaa nyt joku oikein ruahlaiisest eritellen, mikä siis mättää!
Näyttää Montignac (taustajoukkoineen) jo enteilleen insuliini-indeksin esiintuloa (mainitsematta sitä nimeltä) ns. hiilihydraatti -rasva -"kiellolla" ruokavalionsa laihdutusvaiheessa.
Ohessa linkkejä aiheeseen eri tahoilta (tutkimuksia ja käytännön sovellusta). Koskevat niin hiilihydraattie, proteiinien kuin rasvojen vaikutuksia ruioka-aineiden insuliini-indeksiin.
Hyviä lukuhetkiä
Montignac'illa onnistunut
Perustutkimus:
Holt, Susanne H.A., Janette C. Brand Miller, and Peter Petocz. "An insulin index of foods: the insulin demand generated by 1000-kJ portions of common foods." The American Journal of Clinical Nutrition, Vol. 66, 1997, pp. 1264-76.
Mendosan sivusto 2001
Insulin Index
URL:
http://www.mendosa.com/diabetes_update_27.htm
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I have to admit that I never got around to uploading anything about the insulin index until now. The main study was "An Insulin Index of Foods: The Insulin Demand Generated by 1000-kJ Portions of Common Foods" in the American Journal of Clinical Nutrition 1997, Vol. 66: pages 1264-1276 by Susanne HA Holt, Janette C. Brand Miller, and Peter Petocz. They tested only 38 foods and found that glycemic index and insulin index scores were highly correlated. There most interesting finding was that "protein-rich foods and bakery products (rich in fat and refined carbohydrate) elicited insulin responses that were disproportionately higher than their glycemic responses.
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Because Dr. Holt was the lead author of the insulin index study, I naturally thought of her when I started receiving questions about artificial sweeteners producing an insulin release. Some "authority" has apparently been making noises to that effect. Dr. Holt has also been researching the effects of sugar-free drinks on the satiety index, something that I reported here in the most recent issue of this newsletter.
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There hasn't been a lot of research on the effects of most common foods on blood insulin levels, let alone artificial sweeteners and other common food ingredients," Dr. Holt replied to my message. "There have been a few papers published to show that nutrasweet (Aspartame) in the small doses typically ingested in diet sodas etc. do not raise blood glucose or insulin levels much at all. You are likely to get a bigger stimulus for insulin secretion from the other components in the foods, like sugar, fat, and protein.
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Mendosan sivusto 2001
Insulin Index
URL:
http://www.mendosa.com/insulin_index.htm
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The research on the insulin index of foods is intriguing but limited. Only 16 peer-reviewed articles in MEDLINE even mention the term "insulin index," and only one of them actually reports the results of food comparisons. By comparison, 244 peer-reviewed articles mention the glycemic index.
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They…found that glycemic and insulin scores were highly correlated.
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That study is "An Insulin Index of Foods: The Insulin Demand Generated by 1000-kJ Portions of Common Foods" in the American Journal of Clinical Nutrition 1997, Vol. 66: pages 1264-1276 by Susanne HA Holt, Janette C. Brand Miller, and Peter Petocz. The three co-authors were then associated with the University of Sydney in Australia. Susanne Holt was then a graduate student working under the supervision of Janette Brand Miller, and Peter Petocz provided statistical support. Subsequently, Ms. Holt—now Dr. Susanna Holt—obtained her Ph.D. degree and is directs the Glycemic Index Research Service (SUGiRS) in the University of Sydney's department of biochemistry. Ms. Brand Miller—now Professor Jennie Brand-Miller—directs glycemic index research at the University of Sydney's department of biochemistry.
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They tested only 38 foods and found that glycemic and insulin scores were highly correlated. There most interesting finding was that "protein-rich foods and bakery products (rich in fat and refined carbohydrate) elicited insulin responses that were disproportionately higher than their glycemic responses."
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Glycaemic index versus insulin index
"The Zone diet is not about the glycaemic index of carbohydrates, but the insulin index"
- Barry Sears, Zone Perfect Meals in Minutes
URL:
http://www.getzoned.com.au/glycaemic_in ... index.html
Which is more important?
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The glycaemic load of a meal has a much greater effect on its insulin index than its glycaemic index, so the total amounts of carbohydrates that we're consuming should be the focus of our efforts if we're trying to control blood sugar levels. Even if we chose high indexed carbohydrates, if we don't eat too many of them our blood sugar won't be too out of control. Eating a small amount of "bad" carbohydrates is not unhealthy. But as we've just learnt, too many "good" carbohydrates are still bad for us.
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Having said all of this, if we choose the really good carbohydrates, the vegetables that are high in fibre and therefore not very carbohydrate dense, we'll find it quite difficult to eat too many of them at once anyway. There are plenty of exceptions to watch out for though. Some breads and some pastas have low indices but are still very dense. Even some breakfast cereals are now claiming to be "healthy" because of their lowish index. Remember though that one bowl-full still delivers a high glycaemic load and therefore still has a dreadfully high insulin index.
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Low Carb Diet UK
URL:
http://www.low-carbdiet.co.uk/insulin.htm
ja
Atkins to Zone Online
Insulin Index
J S Coleman
Bionomic Nutrition Forum, 2000
URL:
http://atkinszone.com/Insulin_Index.html
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The researchers did find that jellybeans (made of sugar and animal protein) produced the highest mean IS, whereas peanuts (an oily legume) had the lowest IS. The reference food, white bread, consistently had the highest glucose and insulin responses, and had a higher insulin score than most of the other foods. On average fish produced twice as much insulin secretion as did the equivalent portion of eggs. Amongst the few fruits examined, oranges and apples produced significantly lower scores than grapes and bananas, despite similar carbohydrate content. Potatoes had significantly higher scores than all of the other carbohydrate-rich foods. White and brown rice have similar scores, as do white and brown pasta. Despite containing similar amounts of carbohydrate, jellybeans induced double the insulin secretion as any of the four fruits. These findings are presented in the figure below, showing both scores for all 38 foods, in their food groups.
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The Anabolic Power of Insulin
An Interview with John Berardi
by Rob Wilkins
URL:
http://www.testosterone.net/html/body_149ins.html
URL:
http://www.johnberardi.com/articles/nut ... nsulin.htm
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RW — What's the difference between the well known glycemic index (GI) and this insulin index (II) you're referring to?
JB — The popular glycemic index is a measure of the speed at which carbohydrates enter the blood after a meal. A high-glycemic index means that blood sugar rises rapidly in response to a meal while a low-glycemic index means that blood sugar rises very slowly. Traditionally, nutritionists thought that the faster the carbs got into the blood, the bigger the insulin response. So in an attempt to manage insulin, they recommended always eating low-glycemic foods.
However, several studies since have shown that some low glycemic index foods have huge insulin responses! So the correlation between glycemic index and insulin response breaks down with some foods. For example, milk products have a very low glycemic index. But they promote insulin responses parallel to the highest glycemic foods. What's the deal? Well, it appears that there are several other factors that determine insulin release besides carb content and the rate of carb absorption.
This is why the insulin index was generated. This index actually measures insulin response to a food. So rather than assuming insulin response is correlated with carb absorption, these researchers decided to go ahead and measure it. And their results were eye opening!
RW — If a natural bodybuilder is planning their nutrient intake around the insulin index, what foods would they eat and what foods would they avoid?
JB — One thing to keep in mind is that there is no such thing as a bad food. Well, almost no such thing. I don't think anyone can make a case for powdered, cream-filled doughnuts, besides the fact that they taste damn good! But I hope you see my point. Since I said earlier that sometimes you want an insulin surge — especially after workouts — and sometimes you don't — especially at night before bedtime — we have to realize that we use the insulin index not to condemn foods but to decide when to eat them.
The point I want to stress is that the insulin index helps us add information to the glycemic index to make better food choices. So using both indices is the way to go. Since milk products have a low GI but a high II, these foods aren't optimal when you want to keep insulin low. Other example foods or meal combinations for this situation are baked beans in sauce, meals with refined sugars and fats, and meals that are protein and carbohydrate rich. Each of these foods/combos have low GI scores but high II scores, none of which are optimal for low insulin times. But remember, some times you want high insulin so don't relegate these foods/combos to a dark corner of your nutritional closet.
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