Saturday, October 25, 2014

Thursday, August 20, 2009 Kathy, Community Member, asks

Q: Does diet soda affect my glucose readings?

If I take diet soda before my readings does it affect my glucose level?

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Answers (8)
Jan, Community Member
8/20/09 10:48am



It does not affect my glucose readings.



amgran, Community Member
8/20/09 11:40am

I do not drink diet soda but I do drink diet iced tea and it does not affect my blood sugar.

charles, Community Member
8/20/09 11:54am


Dona, Community Member
8/20/09 1:07pm


My understanding is that sugar substitutes like those in diet soda have a very high glycemic index that does have a major effect on our bodies, especially diabetics, that can be harmful.


cookie, Community Member
8/20/09 3:10pm

I have checked my BG many times with diet soda and it does not affect mine.

good luck,


DR.T.PALANICHAMY, Community Member
8/21/09 12:37am

never. it contains only carbonated water. does not contain disacharides. so, it does not raise blood sugar level. dr t.palanichamy

lilypad65, Community Member
8/21/09 4:19pm

it shouldn't, but the chemical aspartame (sp?) is not good for you! My daughter (10 yrs old) has type 1 diabetes and was allowed to have diet soda for a "zero carb" treat, until I found out all the problems aspartame cause. I hope this helps.Smile

Gary, Community Member
4/21/12 5:56pm

When I first started using a blood glucose meter (about 9 years ago), I was concerned about the effect of Aspartame because I had first been diagnosed with diabetes at a time when I was trying to lose weight and drinking aspartame-sweetened diet drinks A LOT. I wondered how I came down with diabetes under such calorie-conscientious circumstances, but I realize it probably had been developing for months before then. Yet, part of my doctor's instructions was to stop drinking sodas - ALL sodas, regular and diet, aspartame-sweetened or otherwise. That was rather disappointing to hear. Curious about it, I later decided to check out how my blood sugar readings would come out after drinking regular soda vs aspartame-sweetened diet soda. Since I wasn't sure at that time how quickly my blood sugar would rise, I decided to take a series of readings, every 20 minutes or so after drinking a full 12 oz. can. Since it's been 9 years since I did that, I don't remember the readings I got, but I do know I was surprised to find that my readings went up just about a much with the aspartame diet soda as it did with regular soda, therefore validating my doctor's instruction. I also remember that the readings peaked much sooner with just drinking soda than they normally would after having solid food. I think the soda readings would peak in about 40 - 60 minutes, while solid food readings usually peak about 1 1/2 to 2 hours. So, if anyone checking this effect by taking readings 2 hours after having the soda doesn't see a significant effect, this may be why...I'm not saying that aspartame has an actual effect on blood glucose levels, but it may have an effect on the readings from a glucose meter. Maybe it depends on the meter - I was using an Ascensia Elite at the time...I did read, however, that there was at least one doctor who suspected that aspartame consumption might even be capable of inducing diabetes...I just looked this up... Also, here's a study which showed aspartame to cause increase in blood glucose (and as a result, insulin release) comparable to sucrose (table sugar): Here's another article also saying aspartame can precipitate diabetes and worsen diabetic neuropathy: ...and there's a whole lot more info here: Anyway, there are many internet articles condemning aspartame - for non-diabetes-related reasons also - and some that say it's safe. You can check them out and decide for yourself. I may just re-do my blood glucose testing form 9 years ago, just to double-check I didn't make a mistake, although it looks like there are plenty other reasons to avoid aspartame besides blood glucose issues.

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By Kathy, Community Member— Last Modified: 02/17/14, First Published: 08/20/09