A YouGov survey of 2,106 UK adults reveals that nearly two-fifths (39%) of Britons consume functional drinks, and a third of those (33%) do so for health and wellness reasons. In other words, more of us are reaching for a drink because of what it claims to do, not just how it tastes.
But “functional" is one of those labels that sounds more official than it actually is. There is no legal definition or regulators for functional drinks. So what actually makes a drink functional, which of the claims are backed by real evidence, and how do you tell a genuinely useful drink from the rest?
This is your complete guide.
What Are Functional Drinks?
A functional drink is a beverage formulated to do something beyond just hydration or taste — often by adding vitamins, minerals, amino acids, botanicals, probiotics, or other active ingredients aimed at a specific health outcome, like energy, focus, digestion, or stress relief.
Under that umbrella, you'll find everything from a can of electrolyte water to a matcha latte to a CBD seltzer. What they share isn't an ingredient or a format, but that intention to provide specific health benefits beyond hydration.
In the UK, health claims on food and drink are governed by Regulation (EC) No 1924/2006, which means that any specific claim (such as “aids relaxation" or “supports digestion”) must be backed by evidence accepted by food safety authorities. But that doesn't always tell you much on its own. What matters just as much is what's inside the can: not only which ingredients there are, but the dose of each one, and how diluted it is — more on that later on.
The Main Categories of Functional Drinks
Functional drinks tend to fall into a handful of recognisable groups, often defined through their benefits.
1. Energy & Alertness
Traditional energy drinks (Red Bull, Monster, Lucozade) lean on caffeine and sugar, but the newer wave uses "clean" energy sources — matcha, green tea extract, guayusa, yerba maté — often paired with B vitamins or nootropics like L-theanine to soften the jitters that come with straight caffeine. Searches for mushroom coffee on Ocado alone rose over 1,500% year-on-year, and matcha sales are up 86%, as more people look for natural energy solutions to reap the potential benefits of quitting caffeine.
2. Gut & Immune Health
Kombucha, kefir, and probiotic sodas fall into this group, built around live cultures, prebiotics, and fermented ingredients intended to support digestion and, by extension, your immune system. This is one of the fastest-growing corners of the market. Kombucha sales on Ocado were up 22% year-on-year and kefir up 30%.
3. Stress & Mood
Adaptogens like ashwagandha and rhodiola, plus botanicals such as chamomile, valerian, and lemon balm, are said to relieve stress and support a calmer nervous system. Some products in this space also use CBD or L-theanine, such as Trip, the fastest-growing soft drinks brand in the UK.
This category of functional drinks has grown alongside the decline in alcohol consumption, with more Britons looking for no- or low alcohol alternatives.
4. Hydration & Recovery
Classic sports drinks and electrolyte waters, formulated with sodium, potassium, and magnesium to replace what's lost through sweat, such as Lucozade and Gatorade. This group might also include protein drinks aimed at muscle recovery after exercise.
5. Cognitive & Focus
Nootropic drinks combining ingredients like lion's mane mushroom, ginkgo biloba, alpha-GPC, and tyrosine, often stacked with a B-vitamin complex, and aimed at mental clarity rather than a physical energy spike.
Increasingly, brands are combining several of these functions into one product — don’t be surprised if you see a single can promising energy and gut health and focus.
How Do Functional Drinks Work?
Functional drinks work the same way any active ingredient works: by delivering a compound to your body in a large enough amount to produce a measurable effect.
The mechanism differs by ingredient — caffeine blocks adenosine receptors to reduce perceived fatigue, electrolytes replace minerals lost through sweat, probiotics introduce live bacterial cultures to the gut — but the underlying logic is the same.
Do Functional Drinks Actually Work?
Whether functional drinks work depends on two factors: evidence and dose.
While health claims on food and drink are governed by regulation, an ingredient appearing on a label tells you nothing about whether there's a meaningful dose of it inside. And the inclusion of an ingredient doesn't mean it will deliver the benefits it promises. Here's what separates a functional drink that's likely to do something from one that's more likely to not.
- The ingredient needs a plausible, well-understood mechanism. Some active ingredients have a clear, agreed-upon effect on the body, such as caffeine and adenosine receptors, electrolytes and fluid balance, fibre and gut bacteria. Others are more speculative. This doesn't mean the benefits aren't there, but just that there is less evidence of its effects, as it stands.
- The dose in the drink should be in the same ballpark as the dose used in research. An ingredient can have excellent clinical evidence behind it and still do very little in a specific product, simply because the amount included is a fraction of the amount needed to feel the potential benefits.
- Consider whether the effect is meant to be immediate or cumulative. Caffeine or electrolytes tend to work within the hour, because they're measurable and fast (alertness, fluid levels). Gut health, stress resilience, and skin benefits are typically the result of consistent use over weeks, not one can.
Frequently Asked Questions
Is Coffee a Functional Beverage?
In a strict sense, yes, coffee is a "functional" drink. Coffee's active ingredient, caffeine, has a clear, well-researched mechanism and a measurable effect on alertness and focus. This technically ticks the same boxes as any modern "functional" drink.
If you like the idea of that functional lift but want to move away from caffeine itself, that's the gap that natural energy drinks are built to fill. Options built around matcha, green tea extract, or guayusa still contain some caffeine, just at gentler, steadier levels, often paired with L-theanine to soften the edges. Fully caffeine-free alternatives — like chicory-based coffee substitutes with added B vitamins or Lion's Mane — go a step further, aiming for the same sense of focus and energy through entirely different mechanisms, with no stimulant involved at all.
Are Functional Drinks Better for You Than Alcohol?
Generally, yes, if you're comparing them directly as a substitute for a drink you'd otherwise have. Alcohol has well-established negative effects on sleep, mood, and long-term health, while most functional non-alcoholic drinks don't carry that same downside.
That said, it doesn't automatically make a functional drink a health product; check it on its own merits (sugar content, dosing) rather than assuming by comparison.
Can I Drink Functional Drinks Every Day?
For most ingredients, yes, in moderation. But it depends what's in them. Electrolyte drinks, herbal teas, and most botanical blends tend to be fine for daily consumption.
Anything caffeinated needs to be counted against your total intake from tea, coffee, and other sources, since it's easy to unknowingly stack up several caffeine sources.
If a drink contains CBD, high-dose adaptogens, or you're pregnant, breastfeeding, or on medication, it's worth checking with a healthcare professional first.
Where a Caffeine-Free Coffee Alternative Fits In
If you're drawn to functional drinks to manage your caffeine intake and support your digestive health, a chicory coffee alternative can tick the functional box without "stimulating" ingredients.
That’s the idea with our Noffee Brain Fuel, a caffeine-free iced latte built around a chicory cold brew base, with 1,500mg of Lion's Mane mushroom fruiting body, Ginkgo Biloba, and a full B-vitamin complex (100% NRV of B1–B12) for natural cognitive support. No refined sugars, no gums, no jitters.
Our functional coffee contains a genuine dose of each, not a trace amount for the label — which, as this guide has hopefully made clear, is the difference that actually matters. This comes with a range of potential benefits, including supporting digestive health, liver function, and your immune system.
Prefer to make your own? Our locally sourced and roasted ground Noffee and Nespresso pods mean you can enjoy the benefits, your style. Read our blog Chicory Coffee Creations - Delicious Drinks You Can Make with Noffee for more inspiration.
Ready to make the switch? Shop Noffee® for caffeine-free functional drinks.
The information in this article is intended for general informational purposes only and does not constitute medical advice. If you have concerns about your health, please consult a qualified healthcare professional.