Another Nail in the Coffin for Soft Drinks?
It’s good to see yet another study on the detrimental effects of Soft Drinks. This time a study from the University of Oklahoma compared two groups of women over a five year period. One group in the 4,000 strong study consumed two or more sugary soft drinks, whilst the other group drank one or less. The participants had their weight, waist size, cholesterol & triglyceride levels measured and compared over the course of the study. The study concludes that woman drinking two or more soft drinks a day are at a higher risk of developing cardiovascular disease and diabetes.
The study indicates that whilst the woman’s weight didn't necessarily increase on this soft drink regime, their risk of developing high triglycerides increased four-fold – therefore bodily fat doesn't appear to be the sole reason for the risk.
An observational study like this has far too many variables, yet it is still useful, especially if it leads to further (ideally clinical) studies. It’s also useful if it makes those who consume soft drinks question their nutrition. I think it likely a woman who consumes several soft drinks a day isn't likely to be following a healthy Paleo diet in every other aspect of her nutrition. This makes it impossible to attribute the declining health of that group to their soft drink consumption alone. I also have trouble with the category of “one of less” soft drinks, as I’d consider one soft drink a day to be very high use – especially where those drinks contain High Fructose Corn Syrup (HFCS)! I look forward to the full peer reviewed study which may address some of these points.
I think a lot of slim people consider themselves healthy and have an attitude that they can “get away” with a poor diet, including drinking regular soft drinks. This study goes some way to challenge those views, and perhaps might help make people realise even though they may feel healthy today, they may be storing up problems for their future health. I just hope studies like this don’t lead to diverted consumption of diet soft drinks, which in my opinion are often even more harmful.
What’s wrong with drinking water?
Soft Drinks and Metabolic Disruption: More Than Just Sugar
While studies like the one from the University of Oklahoma highlight the obvious dangers of sugar-sweetened beverages, it’s crucial to understand that the issue with soft drinks extends beyond their sugar content. The combination of artificial colouring, preservatives, acids and industrial sweeteners creates a chemical cocktail that disrupts metabolism and places significant stress on the body.
Even when weight gain isn't immediately visible, these drinks can silently wreak havoc. Elevated triglycerides, increased insulin resistance, fatty liver, and systemic inflammation can all be linked to frequent consumption of sugary beverages. Metabolically, these drinks offer zero benefit and numerous risks — often in the absence of any clear satiety, which can lead to increased overall caloric intake.
The False Health Halo of Diet Drinks
For those looking to reduce their sugar intake, switching to diet soft drinks might seem like a logical step. However, many emerging studies indicate that artificial sweeteners such as aspartame, sucralose and acesulfame potassium may cause their own set of health issues. They can interfere with gut microbiota, disrupt hunger hormones, and may even be linked with long-term weight gain and glucose intolerance.
Moreover, the very sweetness of these drinks — even without calories — continues to condition the palate to expect sweet tastes constantly, making it harder to wean off sugary or ultra-processed foods. The result? A loop of craving, consumption and metabolic confusion that undermines real food efforts.
Challenging the “Skinny Equals Healthy” Myth
One of the most insidious ideas perpetuated by food marketing is the belief that as long as you maintain a healthy weight, your diet doesn’t matter. But studies like this reinforce the idea that metabolic health is about much more than what the scale says. You can be lean and still suffer from high triglycerides, poor insulin sensitivity, and chronic inflammation.
Soft drinks provide a perfect case study for this. They may not cause immediate weight gain, but their effects on internal health markers can still be profoundly damaging. Just because someone looks “healthy” on the outside does not mean their blood chemistry or organ function reflects the same.
The Case for Replacing Soft Drinks With Real Hydration
Water, herbal teas and homemade infusions with mint, lemon or cucumber provide true hydration without any of the additives found in commercial beverages. For those transitioning off soft drinks, fizzy mineral water with a squeeze of citrus can mimic the mouthfeel of soda without the negatives.
If you're looking for a gentle detox or liver support, dandelion tea and milk thistle infusions can also help — and they’re far more aligned with a Paleo approach than artificially flavoured drinks pretending to offer energy or focus.
How Observational Studies Inform the Bigger Picture
While observational studies can't prove causation, they are often the first step in identifying patterns that warrant deeper investigation. When repeated across large populations and corroborated by mechanistic science, they form a compelling body of evidence.
In the case of soft drinks, we now have multiple observational and controlled studies pointing toward similar conclusions — that sugary beverages contribute significantly to chronic disease. This growing data pool helps to inform public health recommendations, consumer awareness, and eventually, policy change. For example, some cities have introduced sugar taxes on soft drinks or mandated clearer labelling due to this type of research.
The Hidden Link Between Soft Drinks and Gut Health
One area of emerging interest is how soft drinks impact the microbiome. High-fructose corn syrup and artificial additives can feed pathogenic gut bacteria, creating dysbiosis that extends far beyond digestion. This imbalance in gut flora has been linked to autoimmune conditions, mood disorders, and metabolic diseases — further cementing the idea that soft drinks are more harmful than they might first appear.
Artificial sweeteners used in diet soft drinks may also impair the gut lining and encourage the overgrowth of less beneficial bacterial strains. Over time, this can lead to leaky gut and low-grade chronic inflammation, further increasing the risk of disease.
Making Better Choices Daily
If you're trying to support your health or follow a Paleo lifestyle, removing soft drinks is one of the easiest and most impactful changes you can make. Hydration doesn’t need a flashy label or marketing campaign — your body thrives on simplicity. Filtered water, coconut water (in moderation), herbal infusions, and even homemade kombucha (if tolerated) are all great alternatives.
Planning ahead can also help reduce temptation. Keeping a stainless steel bottle of chilled water with you or preparing infused water at the start of each day makes it more likely that you’ll stay hydrated and avoid vending machines or corner shops selling fizzy drinks.
Long-Term Vision: Shifting the Health Conversation
It’s encouraging to see studies like this gaining attention and challenging long-held beliefs. But for real change to occur, the public narrative needs to shift away from calorie-counting and weight-focused metrics toward deeper markers of health. Blood sugar stability, hormone balance, inflammation, and mental clarity are far better indicators of wellbeing.
Eliminating soft drinks — both sugary and diet — is a small but meaningful way to support your body, improve long-term outcomes, and honour the Paleo philosophy of eating (and drinking) in alignment with our evolutionary biology.
As new studies emerge, the importance of whole, unprocessed foods and drinks becomes clearer. Let’s hope this rising body of evidence encourages more people to swap the can for a clean glass of water — their hearts, brains, and future selves will thank them.
What do you think of observational studies like this? Do you think they will they one day start to change nutrition en masse?
