What is prebiotic soda - and is it actually good for you?
Prebiotic soda is one of the fastest-growing drinks categories in the UK right now. You've probably seen it appearing in the fridges at Sainsbury's, Whole Foods, and Co-op. But between the bold cans and the wellness claims, a reasonable question sits underneath it all: what actually is prebiotic soda, and does it do anything useful?
Here's a straight answer.
What is prebiotic soda?
Prebiotic soda is a sparkling soft drink that contains prebiotic fibre - a type of plant-based fibre that your body cannot digest, but your gut bacteria can. Instead of passing straight through your system, prebiotic fibre travels to your large intestine where it feeds and nourishes the beneficial bacteria that live there.
That community of bacteria - your gut microbiome - is linked to digestion, immune function, and, increasingly, research suggests, your mood and mental clarity too.
So unlike regular soda, which offers nothing beyond sugar and fizz, a well-made prebiotic soda does two things at once: it gives you the carbonated, full-flavour experience of a proper fizzy drink, while also delivering fibre your gut can actually use.
What are prebiotics, exactly?
Prebiotics are not bacteria themselves - that's probiotics. Prebiotics are the food that beneficial bacteria feed on.
Think of your gut microbiome as a garden. Probiotics plant new bacteria. Prebiotics water and fertilise the bacteria already growing there. Both have a role, but prebiotics are particularly interesting because they don't require refrigeration, don't contain live cultures, and work by supporting what's already in your system.
Common prebiotics include inulin and oligosaccharides - non-digestible fibres that pass through the upper digestive tract and are fermented by bacteria in the colon.
XOXO uses a blend of three plant-based prebiotic fibres per can, delivering 6g per serving - enough to make a meaningful contribution to your daily fibre intake.
Is prebiotic soda actually good for you?
The honest answer is: it depends on the dose, the ingredients, and what you're comparing it to.
Let's break that down.
Compared to regular soda, yes - significantly.
Popular prebiotic sodas have around 2 to 5 grams of sugar per can, whereas popular mainstream sodas average around 39 grams of sugar. That's a meaningful difference if soda is part of your daily routine.
96% of UK adults do not meet the recommended 30g daily fibre intake, and average consumption sits well below the target. A drink that contributes 6g of prebiotic fibre - a fifth of the daily recommendation - in a format people actually want to consume every day is a genuinely useful thing.
On the gut health claims specifically, the research is promising but nuanced.
Some small studies have linked prebiotics with a healthier gut lining, improved insulin sensitivity, and increased feelings of fullness. They also suggest prebiotics may provide some relief from constipation.
Researchers note that you generally need at least 3g of prebiotic fibre per serving to begin seeing benefits. At 6g per can, XOXO sits comfortably above that threshold - which is notably more than several well-known US prebiotic soda brands.
The amount of prebiotic fibre in sodas varies significantly between brands. Some may contain too small an amount to have meaningful effects. Dose matters, which is why the fibre content on the label is worth checking before you buy.
The verdict: better than regular soda, and worth it if fibre is a gap in your diet.
No single drink will transform your health on its own. But as a daily swap from sugary or artificially sweetened sodas, a prebiotic soda with meaningful fibre content, no artificial ingredients, and low sugar is genuinely a better choice - not just marketing.
What makes a good prebiotic soda?
Not all prebiotic sodas are equal. Here's what to look for:
Fibre content. Look for at least 3g per can. Higher is better. XOXO contains 6g of plant-based prebiotic fibre per can from three natural fibre sources.
Sugar. A prebiotic soda with high sugar content partially undermines the benefit. Look for under 9g per can.
Artificial ingredients. Some prebiotic sodas use artificial sweeteners, colours, or preservatives. XOXO uses none.
Who is prebiotic soda good for?
Prebiotic soda is particularly well-suited to people who:
- Drink regular soda daily and want to reduce sugar without giving up the fizz
- Struggle to hit their daily 30g fibre target through food alone
- Are looking for an alcohol-free drink that feels like more of a treat than sparkling water
- Want to support their gut health as part of an everyday routine rather than a supplement regimen
It is not a replacement for a varied, fibre-rich diet. But as one part of a healthier daily routine, it earns its place.
Prebiotic soda vs probiotic drinks - what's the difference?
This is a common source of confusion.
Probiotic drinks - like kefir, kombucha, or certain yoghurt drinks - contain live bacteria that you're adding to your gut. They require refrigeration, can taste quite sharp, and the bacteria need to survive the journey through your digestive system to be effective.
Prebiotic soda works differently. It feeds the bacteria already in your gut rather than introducing new ones. It doesn't require refrigeration, has a longer shelf life, and tends to taste much more like a conventional soft drink.
The two approaches are complementary rather than competing. If gut health is a priority, including both prebiotic fibre and probiotic foods in your diet makes sense.
The bottom line
Prebiotic soda is a sparkling drink containing plant-based fibre that feeds beneficial gut bacteria. The best versions are low in sugar, free from artificial ingredients, and contain enough fibre per serving to make a real contribution to your daily intake.
Compared to regular soda, prebiotic soda is meaningfully better - lower in sugar, higher in nutritional value, and a practical way to build fibre into a routine that most UK adults are falling short on.
XOXO is the UK's first prebiotic soda. Each can contains 6g of plant-based prebiotic fibre from three natural sources, zero artificial ingredients, and under 5g of sugar. It's available online and in Sainsbury's, Ocado, Whole Foods, Co-op, and Planet Organic.
