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Another diet question

MetalSeagull

Critical Thinker
Joined
Feb 24, 2002
Messages
378
I had a doctor's appointment today. The doctor gave me some advice on losing wieght:

Exercise every day. OK. Fine.
Don't eat after 6 PM. I can see why this would work.
Give up all carbonated sodas, even diet. Now, this is where my question comes in.

The reason he gave was that all food must convert to glucose (yes, yes, I know this) and the artificial sweeteners also somehow convert to glucose?

Have I just misunderstood what he was talking about? Because that explaination doesn't make sense. How can something with no food energy convert to glucose?

Is there a different valid reason why avoiding even diet soda can facilitate weight loss. Or conversely, why continued consumption would inhibit weight loss?
 
This is coming totally off the top of my head. I've not researched this or even thought about it for more than 10 seconds. Your doctor is wrong. Wrong wrong wrong.There are no calories in diet soda. They don't somehow convert to calories during digestion.

There may be a real reason artificial sweeteners can inhibit weight-loss, but I don't know it. Maybe they're so nasty that they make you sad and depressed and sedentary?

Maybe caffeine inhibits weight-loss. But if that were the case, he should've told you diet, caffeine free soda was okay..

The not eating after 6 thing is pretty silly, too. What if you don't go to bed until midnight?
 
Exercise every day. OK. Fine.

Not fine. You don't necessarily have to exercise every day.

Don't eat after 6 PM. I can see why this would work.

I can't. Actually this advice is as stupid as it gets.

Give up all carbonated sodas, even diet. Now, this is where my question comes in.

The reason he gave was that all food must convert to glucose (yes, yes, I know this) and the artificial sweeteners also somehow convert to glucose?

Have I just misunderstood what he was talking about? Because that explaination doesn't make sense. How can something with no food energy convert to glucose?

It can't. He doesn't know what the hell he's talking about.

Is there a different valid reason why avoiding even diet soda can facilitate weight loss. Or conversely, why continued consumption would inhibit weight loss?

Not a single one.

My advice: DO NOT ever ask that doctor again for any diet related matters. Ask him whether he has studied nutrition in the university. Don't be satisfied if he just says "yes", just ask him what books did he have to read and for how many semesters did he study nutrition.

Doctors don't usually study nutrition in the universities. Ask a qualified dietician instead.

Feel free to ask anything you may need clarification for.
 
I had a doctor's appointment today. The doctor gave me some advice on losing wieght:

Exercise every day. OK. Fine.

Aerobics every day, though it can help if you pick some days to skip.

Don't eat after 6 PM. I can see why this would work.

Don't eat within two hours before going to bed, preferably three. Eating larger meals at the beggining of the day also helps.

Give up all carbonated sodas, even diet. Now, this is where my question comes in.

The reason he gave was that all food must convert to glucose (yes, yes, I know this) and the artificial sweeteners also somehow convert to glucose?

Have I just misunderstood what he was talking about? Because that explaination doesn't make sense. How can something with no food energy convert to glucose?

I know that the bacteria in my mouth can digest splenda. Ick.

Honestly, like El Greco says, I wouldn't trust this doctor. However, take note of how your body reacts to artificial sweeteners. I know that, for myself at least, splenda is dehydrating for some reason, and I just forced myself to acquire a taste for water instead. Cheaper too.

Drinks with a lot of sodium in them will also promote water retention, which will inhibit weight loss as well.

My general advice is to reduce or eliminate your intake of products with high fructose corn syrup. It gets absorbed faster than normal suger and makes you feel hungrier than you should, causing you to eat more.
 
My take on your doctor's advice to not eat after 6pm may just be a way to reduce your calorific intake if you have a snack or supper in the evening.
 
my advice is to eat many small meals, including at night time. That way your body thinks there is plenty of food, so will allow you to burn energy. Also drink plenty of water. Some people think they are hungry when they are actually thirsty. Never go hungry, because that will make you eat whatever is available. Guilty consciouses are for wimps.

Or better still, do your own research and find out for yourself what is good advice.
 
Well, one shouldn't eat before you sleep. All those extra calories get stored as......fat.

Perhaps carbonated beverages make you retain water?

Of course, just drinking water is probably better for you than soda. Just as a given.
 
Dr. Rudy's diet works well. It's called "Eat Less". The Australians reading this who watch SBS will be chuckling.... :)

But umm yeah.. seriously... Try this:

The Hacker's Diet

It's the diet plan of a non-woo. He's an engineer, founder of Autodesk, all-round smart guy. His diet is basically energy in vs energy out. It's simple.

Also, the CSIRO (Australian government science organistaion) has a diet book out:

CSIRO's Total Wellbeing Diet

The science might not stand up to serious scrutiny (eg. it was funded by Meat & Livestock Industry, and the research was not to find the 'best' diet, but to find if a high protein diet "worked"), but it's better than woo. Maybe the science does stand up to serious scrutiny. I'm not a nutritionist, so maybe some people here might have more informed opinions.
 
Just a note on artificial sweeteners: Some of them are metabolized into glucose. SO if you don't wanna read the fine print and run around with a list of the good ones, the simple solution is to avoid them all. Also, several of them are under suspicion of being carcinogenic.

Hans
 
I've lost 5 stones (70 pounds) in the last 5 months. I made four lifestyle changes; I stopped eating in the evenings, which is where my daily calorie consumption was worst; I dumped the diet drinks in favour of water and fruit juices; commenced regular intake of multi-vitamins and so-called fat burning supplements such as lecithin and finally I exercise daily at 7.00am (30 mins of swimming).

I'm not sure which of these is havintg the biggest effect, or even if all of them ARE, but something's working - and working amazingly well. I suspect that the daily morning exercise is stimulating my metabolism, and eating earlier in the day is preventing tons of excess carbs from lying around in my system before bedtime. As for the diet drinks... well, most of them are stuffed with caffeine as well as chemical sweeteners, so at least I don't get the shakes, anymore!
 
There was a study done just recently that found that people who drink diet sodas tend to gain more weight, for some reason. It may be the confusing signals that your body is getting -- thinking you actually have something sweet that should be providing energy, but it doesn't. So you are hungrier and actually eat more than you should.

Me, I almost never had Diet Coke by itself -- always with chips or cookies or something, which didn't help either. I also think that there is some addictive quality to it. I can't say the number of days I woke up craving a Diet Coke.

Recently I've been cutting back, first by limiting it to two 20-oz bottles of DC a day for a week, the next week-one DC and allowing one other soda or diet soda. Now this week I'm keeping it to one 20-oz bottle of any kind of soda per day. The craving is mostly gone and strangely, DC is not as satisfying as it used to be.

I also keep a full 32-oz bottle of water on my desk at work.
 
As I understand it, while the main ingredient of many of the newer artificial sweetners, such as splenda, etc, generally has no effect on blood sugar, some of the filler agents, such as dextrose sounding things, do cause a spike in blood sugar. That being said, I think the filler agents are in such small amounts that the glycemic institute says a small amount of the sweetner each day is ok.

www.glycemic.com/

I gleaned the above info from teh two books you can buy on the Glycemic Research Institutes site that I've linked above. I dont have them with me, but there is seciton all about artificial sweetners and their affect on blood sugar.
 
I've lost 5 stones (70 pounds) in the last 5 months. I made four lifestyle changes; I stopped eating in the evenings, which is where my daily calorie consumption was worst; I dumped the diet drinks in favour of water and fruit juices; commenced regular intake of multi-vitamins and so-called fat burning supplements such as lecithin and finally I exercise daily at 7.00am (30 mins of swimming).

I'm not sure which of these is havintg the biggest effect, or even if all of them ARE, but something's working - and working amazingly well. I suspect that the daily morning exercise is stimulating my metabolism, and eating earlier in the day is preventing tons of excess carbs from lying around in my system before bedtime. As for the diet drinks... well, most of them are stuffed with caffeine as well as chemical sweeteners, so at least I don't get the shakes, anymore!

As far as calories go, fruit juice usually isnt any better than a regular (non-diet) soda. True there are vitamins and minerals, and maybe some fiber if the juice has pulp, that isnt in soda, but you can get those by eating the whole fruit. Fruit juice is pretty much just the extracted sugar from the fruit. (While "fruit sugar" is generally better than high-fructose corn syrup, it still has a high glycemic response).
 
Some of my friends believe in having a daily "fast" for 11 hours a day. In other words if you are going to eat breakfast at 7AM, then finish eating dinner by 8PM the night before. Supposedly the body starts burning fat in the 5th hour.

I don't know if this is true, but I guess it can't hurt not to eat during that time of day.

Personally, I find the biggest thing that makes a difference is whether or not I'm exercising.
 
Just a note on artificial sweeteners: Some of them are metabolized into glucose. SO if you don't wanna read the fine print and run around with a list of the good ones, the simple solution is to avoid them all.
That's actually a pretty dumb solution:

"Gee, if I drink this normal, naturally-sweetened soft drink, I'll be consuming 28 grams of sugar. But if I drink this artificially-sweetened soft drink, the 4 grams of artificial sweetener in it might get metabolized into 3 or 4 grams of sugar! How awful! I must avoid this artificially-sweetened soft drink entirely and consume only the naturally-sweetened variety!"

Also, several of them are under suspicion of being carcinogenic.
What isn't these days?
 
Thank you to everyone for the responses. I can usually only check the forums once a day, and I'm still reading through them.
 
Some people report that they have an insulin response to artificial sweeteners - it doesn't seem to make sense, but maybe somehow the taste is a part of the mechanism. It's easy enough to find out if it affects you, if you know anyone with a blood-sugar testing rig (like a diabetic person). Test your blood sugar, drink a diet soda, and test again.

Mind you, I mostly hang out some forums with people who have very twitchy insulin. If there is no diabetes in your family, maybe you don't have this problem at all.

And I recommend weightlifting. Better results for less working out! With cardio it gets to be more and more work to burn the same number of calories; with weightlifting, the workout burns calories, you keep burning 'em for a while as your muscles repair, and as you put on lean body mass you will burn more calories just sitting around all day. By all means do some cardio, first thing in the morning, or after a lifting workout. But for people who haven't tried weightlifting, two 45-minute workouts a week are all it takes to get started.
 
1) The idea is that you shouldn't stress your peptic system before going to bed. Eating something easily digestable even right before you sleep poses no problem, in fact it is rather mandatory if you weight train (in order to take advantage of the GH spike).

2) Small meals or one meal doesn't really matter, it depends on what plan makes it easier for you to eat less. Smaller meals throughout the day are preferable if you train with weights, but then again this is of minimal importance if you get adequate protein and are over 20% bodyfat - you won't be losing much muscle mass anyway at these bf levels.

3) One guy eats only at night, another one only in the morning. Assuming they are cloned, if they eat the same calories they'll be losing the same weight. It's true that guy A will be storing calories as fat during his night sleep, but will be burning this fat next morning when guy B will be eating. It all boils down to caloric balance, and the law of the conservation of energy wouldn't allow it any other way.

4) Some artificial sweeteners may metabolize to glucose, but the amounts are ridiculously low. Eating pure protein will raise your glucose much more.

5) The consensus is that artificial sweeteners are safe. From this article (bold mine):

Despite some rather unscientific assumptions, there is no evidence that aspartame is carcinogenic. Case–control studies showed an elevated relative risk of 1.3 for heavy artificial sweetener use (no specific substances specified) of >1.7 g/day. For new generation sweeteners, it is too early to establish any epidemiological evidence about possible carcinogenic risks. As many artificial sweeteners are combined in today's products, the carcinogenic risk of a single substance is difficult to assess. However, according to the current literature, the possible risk of artificial sweeteners to induce cancer seems to be negligible.

Sturgeon's study has found a slightly elevated bladder cancer risk *for heavy users* (and 1.7g/day is some heavy use), but this isn't surprising: Everything in excess will cause problems, as that same study showed with heavy coffee drinkers.

6) The glycemic index and the insulin spikes are not a good measure of how hungry one will be. No, in fact they are a terrible measure. There has been developed another index for this purpose, the satiety index. By collating the two lists we can see that some foods with high GI also have a surprisingly high SI. And face it: Without supplementing with steroids you are going to be hungry sooner or later. It's pretty much inevitable since leptin will eventually plummet.

7) Lots of things can raise insulin, including protein, sleep deprivation, certain medicines and perhaps even thoughts of food. Does this mean that all these things make you fat ? Elevated insulin by itself means nothing as far as weight control is concerned.

8) From the Anecdotaland, everytime I go below 8% I follow a diet with lots of artificial sweeteners and I eat 75% of my calories after 9 pm.

A calorie is a calorie, no matter when or where you get it (from). (well, not exactly, but the eccentricities of calorie partitioning are of no use to most people)
 
Contents

A can of Diet Coke contains 355ml (12 fluid oz)2 of beverage that is free of calories, fat, protein, and carbohydrates. It is not totally without content however, as it does contain 40mg of sodium and 46.5mg of caffeine3. Other ingredients include caramel colouring, aspartame, phosphoric acid, and citric acid. While it doesn't show up in the list of ingredients, there is a warning on the can to people with phenylketonuria that Diet Coke contains phenylalanine. Not surprisingly, the leading ingredient in Diet Coke is good old water.
http://www.bbc.co.uk/dna/h2g2/A907454

Furthur Carbonation effect of soda on gastric pH is need to be co-related (The pH of Pepsi is 2.5. Diet Pepsi is 3.1) .
 
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