Instead of reaching for a cigarette, many Millennials treat themselves to a Diet Coke from the fridge during their short break from everyday life. But is the supposedly harmless drink actually the healthier alternative?
Diet Coke is currently very popular among millennials. On social media, the drink is sometimes referred to as a “refrigerator cigarette” or even a “new cigarette” – in reference to the fact that for many people, Diet Coke, like a cigarette, serves as a short-term outlet to reduce stress or calm down. Even if consuming a sugar-free lemonade seems much more harmless than smoking, scientific studies indicate that regular consumption of diet cola and other light drinks is not uncritical. However, whether this trend can actually be compared with cigarette consumption is controversial. Nutritionists classify the debate.
Healthier than cigarettes? Millennials are drinking Diet Coke more and more often
First of all, one thing can be said: There are currently no specific studies on the effects of Diet Coke on the human body. Rather, research focuses on the sweeteners contained in diet drinks as well as consumption habits and their connection to health data. One of the most frequently discussed artificial sweeteners is aspartame, which is also contained in Diet Coke.
Opposite Vogue.it Nutritionist Scott Keatley explains that from a biological perspective, these sweeteners do not increase blood sugar levels, do not trigger insulin release and do not provide any calories. In addition, no clear connection has yet been found between the consumption of Diet Coke or other diet drinks and an increased risk of cancer – at least as long as the intake remains within the average range. However, studies suggest that regular consumption of low- or no-calorie sweeteners, such as those found in Diet Coke and similar drinks, could potentially have health effects.
Scientific studies show: Diet Coke really is that healthy
One in September 2025 in the specialist magazine Neurology published study found that people who regularly consume artificial sweeteners experience accelerated cognitive decline compared to non-consumers. The study was based on data from almost 13,000 participants. In addition, other scientific Analyzes suggests that high consumption of diet sodas can have negative effects on mental and general health. An increased risk of developing diabetes is also discussed. There is also evidence that regular consumption of diet drinks could accelerate cell aging processes. In addition, possible side effects from excessive consumption of Diet Coke include symptoms such as flatulence, heartburn, tooth erosion and sleep disorders due to the caffeine it contains. Nutritionist Scott Keatley warns Vogue.it also prevent artificial sweeteners from changing the perception of sweetness. This can in turn increase cravings for sweets.
How much Diet Coke can you drink without endangering your health?
Despite possible side effects and although both sugary sodas and light versions have no significant nutritional value, they do not cause irreversible damage with the first sip. Occasional consumption of diet cola is therefore considered to be harmless to health. When consumed in moderation, sweeteners have no proven toxic effects and do not influence the intestinal flora in a clinically relevant way, as they are quickly excreted from the body. As is often the case, the decisive factor is the amount consumed.
Because excessive consumption of diet cola can pose health risks. Among other things, it can affect the calcium balance. The phosphoric acid, caffeine and sodium contained can inhibit calcium absorption and at the same time increase its excretion in the urine. As a result, the risk of reduced bone density, osteoporosis and bone fractures increases. Carbon dioxide can also influence the mineral balance and contribute to the long-term loss of bone substance.
In addition, daily consumption of Diet Coke can have negative effects on the intestines. The sweetener aspartame is suspected of altering the microbiome, which can lead to imbalances and digestive problems such as diarrhea, flatulence or irritable bowel symptoms. In addition, acids and caffeine can irritate the intestinal mucosa, while carbonic acid increases pressure in the abdominal cavity and can impair intestinal function if consumed regularly.
Experts therefore recommend consuming Diet Coke only in moderation – ideally no more than once or twice a week. In addition, it should under no circumstances replace water or other suitable drinks as the primary source of fluids.
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