Calculating the GL figure

rt567 said:

Hi

I've learnt how to calculate the GL figure, ie Gi x GL dived by 100 = result

for burgens soya/linseed bread its about 4.3. per slice which is 40 grams I think

So if I was to eat slices, would that equate to 8.6 and for 3 slices 12:9 etc/etc? Within reason course, plus what I have in the bread.

Otaibix calculation is about 8 GL per biscuit

Please help.

Thanks again

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rt567 said:

Hello
Many thanks for that.

Sorry for being a bit thick, but if I ate 4 slices of the bread in one session, would it be double the amount GL as you have posted.
Yes

RE the two figures, why is one lower and the other higher?
The GI data base contains the GIs obtained from several recognised laboratories , sometimes you will find that the same thing has been tested on different occasions with different results. The GI of 36 for the Burgen was the result of a test in 1997, the one of 52 was the result of a test in 2008.
There are several possible reasons for 2 different GIs for the same product.
1) When they test the GI they use only a small sample of people. If they test again it will be a different group of people so the results will differ because of individual differences (that's why it is probably better to look at the type of foods that have lower or higher GIs than one off results)
2) In the earlier days of testing (ie back in 1997), it is possible that testing was done slightly differently than today.
3) Sometimes the manufactures change the recipe slightly and that can alter the GI. (the biggest known example of this is Rice Krispies where they seem to have different recipes for different countries)

Thanks again.

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rt567 said:

Thanks again, very much appreciated.

Can anyone answer the quest about if I was to east twice the mentioned level in one session would that double the GL? If yes, sorry for being a bit thick.

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rt567 said:

Hiya,

At last, this makes sense - thanks!

I got confused with the GI levels remaining the same as I intially read a lot about GI's. This is why the GL is a better calculation to use.

I'm very clear on this now and will put myself to the test:

GI of Burgens soya/linseed brea is 36/52 X 12,carbs per slice/40 grams) dived by a 100 = average figure of just over 5.

Thanks again

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