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Is Diet Coke Bad For You? Sweetener Scaremongering
If there’s one topic that is guaranteed to get jimmies rustled, get you unfollowed on Facebook and get gym leggings in a twist, it’s diet coke.
Seriously, we have been accused of being sponsored by coca cola before by someone who didn’t like it when we said that it’s not that bad for you (there’s the cat out of the bag already).
Why something so insignificant as a can of juice can command such hatred and why it’s the cause of many a hot debate is….well, quite frankly, bizarre.
Anyway, let’s get into it - is diet coke bad for you?
Listen to some and they’ll have you running to the hills with fear. You may have heard:
- Diet coke causes cancer
- Diet coke tricks your body and turns on fat-storing-mode
- Diet coke depletes nutrients and makes you hungry
- It’s filled with chemicals therefore it’s pretty much poison
- Diet coke is the cause of all things evil, should be banned and how dare you, a nutritionist, say that it shouldn’t be outlawed
Now, before anyone gets even more worked-up and accuses us of saying it’s ‘healthy’ let’s get a few things straight.
We’re not pro diet coke. We’re not against it either. Context is key.
There are a lot of myths surrounding the drink that are simply just a load of nonsense. This article is going to clear the confusion. What does the evidence say about diet drinks?
How Bad Is Diet Coke For Your Health?
Probably not that bad at all.
“There are no studies that indicate any long-term health risks from drinking diet soda. Diet Soda….is not harmful to health, well-being, or body composition” ~ Examine.com
So far, so good for the coke zero and diet coke fans.
What about the cancer risk?
Back in the 60’s, there was a study that linked aspartame (the sweetener in diet coke) with brain tumours but more recent evidence has proven that this isn’t the case and that there is no link between diet drinks and cancer.
A review paper in the Regulatory Toxicology and Pharmacology Journal concluded that “the studies provide no evidence to support an association between aspartame and cancer in any tissue…..the weight of scientific evidence confirms that, even in amounts many times what people typically consume, aspartame is safe for its intended uses as a sweetener and flavor enhancer…..”
What about the chemicals?
"My buddy said aspartame ingestion produces methanol and formaldehyde."
Yes, that’s formaldehyde as in the stuff used to preserve dead bodies.
Whist it is true that aspartame is broken down into methanol (which is then converted into formaldehyde), as well as two amino acids, phenylalanine and aspartic acid - it is extremely unlikely to be detrimental to health.
Why? Well, the key is in the dosage.
There are many other foods that supply as much and often more methanol, phenylalanine and aspartic acid than the simple diet coke. Fruits and vegetables for a start!
Semi-skimmed milk, for example, contains 6-9x more phenylalanine and 13x more aspartic acid than a diet coke. Tomato juice also has 4-6x more methanol than a diet coke too.
Finally, formaldehyde is produced by our bodies every day in amounts thousands of times greater than you would ever get from aspartame. It is actually needed to make essential compounds, including your DNA. Source: Academy of Nutrition and Dietetics
Here`s another example of why dosage is key and just because something "contains chemicals" doesn`t mean it`s automatically unhealthy. Apples, cherries and apricots all contain the poison cyanine!
Do you avoid them for this reason? No, because the dosage is insignificant. Ever heard of apple eaters dropping like flies with cyanine poising, no, of course you haven’t.
Anyway, back to diet coke.
Does it get the thumbs up? No so fast, your dentist won`t be a fan.
One thing to mention is that diet drinks, although sugar free, may not be great for your pearly whites.
Studies have shown that carbonated drinks aren’t great for tooth enamel, which is one reason why you may not want to go overboard with the coke zeros.
So far, according to the science, diet cokes aren’t bad for your health. But…
Does Diet Coke Affect Fat Loss?
Let’s get something straight, weight gain and weight loss is determined by calorie balance (calories in vs calories out):
“A fundamental principle of nutrition and metabolism is that body weight change is associated with an imbalance between the energy content of food eaten and energy expended by the body to maintain life and to perform physical work” ~ Am J Clin Nutr
Want to know more about the basics of fat loss? Read this: Fat Loss Basics.
A drink that contains zero calories cannot cause you to gain weight. It’s physiologically impossible.
There is no evidence that shows drinking diet drinks will result in fat gain.
Some studies have actually shown that sweeteners may even improve weight loss and long-term control of body weight.
How can this be?
Ever had a sweet tooth? Of course you have. Sometimes artificially sweetened foods, although unlikely to serve any nutritional benefit can eliminate sugar cravings.
If a zero calorie diet coke is the “go to” instead of a 300 calorie chocolate bar, it doesn’t require an expert to explain why this is going to make a difference to the waist line.
Overweight Folks And Diet Drinks
Now some studies have shown that people who are overweight or obese drink more sugar-free drinks than people who are a healthy weight.
But is the diet coke to blame? Unlikely.
These studies have also shown that the overweight people - who were drinking the diet drinks - had a much higher calorie intake than those who didn’t.
What’s more, people who generally have poor diets may also be more likely to drink diet drinks to offset the high amount of calories consumed by making poor food choices.
Although overweight people may drink more diet drinks, the diet cokes are unlikely to be the cause of the problem. This is a classic example of why correlation does not equal causation. Here’s another example:
In America, in summer, people eat more ice cream. In America, in summer, more people also get eaten by sharks.
One does not cause the other, ice cream does not cause shark attacks, just like diet coke doesn’t cause obesity.
Wait, Does Coke Trick Your Brain?
You’ve heard this one before too, haven’t you? That diet coke tricks your brain that it’s actually sugar.
The argument often centres around insulin (a hormone which plays a key role in the regulation of blood glucose levels). You’ll get folks that say that diet coke causes an insulin spike which results in weight gain.
Diet Coke Can Clean Coins, So It Can`t Be Good!
The logic applied by some, is that if diet coke can clean coins, it can`t be good for your insides, which seems reasonable.
Other cleaning-related uses for diet coke are that it is good to clean rusted battery terminals, clean toilets and polish cars. The old favourite is that traffic police apparently carry two gallons of coke in their car boots to remove blood from the road after a car accident.
Here’s the deal.
Fizzy drinks contain carbonic acid which make them good stain removers.
Guess what? Plain old fizzy water or soda water does exactly the same thing. It isn’t anything mythical or chemical about the diet coke that makes it a good cleaner, it’s simply the carbonic acid.
Folks have been drinking fizzy water for years with no side effects and again, there is zero evidence that shows moderate consumption is detrimental.
Finally, the gastric acid in your stomach is far stronger than any acids found in fizzy juice anyway.
The Round-Up: Is Diet Coke Bad For You?
Diet coke isn’t ‘healthy’ but there isn’t really anything particularly ‘unhealthy’ about moderate consumption of it either.
If weight loss is the goal then swapping from a regular fizzy drink to a diet drink is probably going to be beneficial. If you’re a fizzy juice fiend then switching from three normal cokes to three diet cokes would cut sugar intake by around 90g. This will reduce calories by almost 400, which will likely help your waist line and you can do so knowing that the evidence shows that it’s safe to do so.
Similarly, if you’re often dehydrated and you find you can’t keep your fluids topped-up because you find water a tad dull then a slash of no-added sugar squash may make drinks more palatable and as a result, improve your hydration levels.
On the other hand, if you currently don’t drink diet coke and you’re perfectly happy with water, teas and coffees and so on then there certainly aren’t any health benefits to be had from diet drinks, you’re not missing anything.
It`s up to you what you drink but plain old water is still our favourite!
What do you think? Do you drink diet coke or do you avoid it? Let us know in the comments section below.
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