Ger II höga insulinnivåer under längre tid?

[MunsöHustla]

Högt glykemiskt index ska ju påverka inaulinivåerna negativt tex om du äter snabba kollisar till frukost kommer du ha sämre fettförbräning hela dagen, gäller detta också II?

[King Grub]

Om insulinutsöndringen beror just på högt GI i det första målet, så ja, eftersom det höga GI:t förs över på nästa mål också. Om det gäller även proteinstimulerat II törs jag inte säga, men jag har för mig att jag läst att så är fallet. Även om jag inte har möjlighet att kolla upp studien just nu.

[nubi]

Hur kommer det sig att GI för måltiden påverkas av det man har ätit tidigare under dagen?

[King Grub]

Från middag till frukost (men gäller naturligtvis andra mål också):

Second-meal effect: low-glycemic-index foods eaten at dinner improve subsequent breakfast glycemic response
Wolever_TM; Jenkins_DJ; Ocana_AM; Rao_VA; Collier_GR

Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Ontario, Canada.

Am J Clin Nutr, 1988 Oct, 48:4, 1041-7

The effects of the glycemic index (GI) of carbohydrate eaten the previous night on the glycemic response to a standard test meal eaten subsequently in the morning (breakfast) was studied. On separate evenings normal subjects ate low- or high-GI test meals of the same nutrient composition. The dinners consisted of single foods in two experiments and mixed meals containing several foods in the third. The differences between the observed glycemic responses to low- and high-GI dinners were predicted by their GIs. The glycemic responses to breakfast were significantly lower on mornings after low-GI dinners than after high-GI dinners. Eating, at dinner, foods with different fiber contents but the same GI had no effect on postbreakfast glycemia. We conclude that the GI predicts the difference between glycemic responses of mixed dinner meals; breakfast carbohydrate tolerance is improved when low-GI foods are eaten the previous evening.

[nubi]

Tackar Grub! Att ha dig här på forumet är bättre än att ha Pauluns telefonnummer =).

[King Grub]

Från frukost till lunch:

Effect of the glycemic index and content of indigestible carbohydrates of cereal-based breakfast meals on glucose tolerance at lunch in healthy subjects.

Liljeberg HG, Akerberg AK, Bjorck IM.

Department of Applied Nutrition and Food Chemistry, Chemical Center, Lund University, Sweden.

BACKGROUND: Diets with a low glycemic index (GI) have been shown to improve glucose tolerance in both healthy and diabetic subjects. Two potential mechanisms are discussed in relation to long-term metabolic effects: a decreased demand for insulin in the postprandial phase and formation of short-chain fatty acids from fermentation of indigestible carbohydrates in the colon. OBJECTIVE: The objective was to study the effect of the GI and the indigestible carbohydrate--resistant starch (RS) and dietary fiber (DF)--content of cereal-based breakfasts on glucose tolerance at a second meal (lunch) in healthy subjects. DESIGN: The effects of 7 test breakfasts with known GIs (GI: 52-99) and RS + DF contents (2-36 g) were evaluated. White-wheat bread was used as a reference breakfast (high GI, low RS + DF content). Glucose and insulin responses after the second meal were measured in healthy subjects. In addition, the satiating capacity of 4 of the 7 test breakfasts was estimated before and during the second meal. RESULTS: Two of the 4 low-GI breakfasts improved glucose tolerance at the second meal. Only these 2 breakfasts were capable of postponing the in-between-meal fasting state. There was no measurable effect of fermentable carbohydrates on glucose tolerance at the second meal. The highest satiety score was associated with the barley breakfast that had a low GI and a high RS + DF content. CONCLUSIONS: Glucose tolerance can improve in a single day. Slow absorption and digestion of starch from the breakfast meal, but not the content of indigestible carbohydrates in the breakfast meal, improved glucose tolerance at the second meal (lunch).

[MunsöHustla]

Originally posted by King Grub
Om insulinutsöndringen beror just på högt GI i det första målet, så ja, eftersom det höga GI:t förs över på nästa mål också. Om det gäller även proteinstimulerat II törs jag inte säga, men jag har för mig att jag läst att så är fallet. Även om jag inte har möjlighet att kolla upp studien just nu.

Om fallet är så att gällande proteinutsöndringen borde det vara rätt värdelöst att dra vassle drinkar till frukosten under deff...

[nubi]

bah.... jag skulle aldrig byta ut mitt jordgubbsvassle på gröten mot tonfisk... yuck