There is an actual index for how uncertain the world feels. The World Uncertainty Index, built by researchers at the IMF and Stanford, text-mines analyst reports across 143 economies every quarter and counts how often they reach for the word "uncertain." As of Q3 2025, it had reached the highest reading in its recorded history at that point: above the COVID spike, above 2008, above 9/11. For the first time, the record-setter was a trade shock, and for the first time, the stress registered in all 143 economies at once.
Macro anxiety of that breadth does not stay macro. It walks into the store, and we can watch it do so in both of our data streams.
Our Panel Puts a Number on the Anxiety
In the Q1 2026 wave of our wellness study (n=5,221), money is the single most named cause of stress at 36.1 %, the clear number one. The news, politics, the economy, and climate follows at 18.9%, just behind work and lack of sleep and ahead of children, spouses, and health conditions. And 35% of adults rate their typical stress level a 4 or 5 out of 5.
That is what a record uncertainty reading looks like when it reaches a kitchen table: money first, headlines close behind.
Uncertainty Has a Purchase Pattern
Economists have called it the lipstick effect for decades: when big purchases feel risky, small indulgences absorb the demand. By 2025, the pattern had a new name. CNBC and others began calling it "treatonomics," and IBISWorld analyst Matthew Buchko identified artisanal food and drinks as a structural beneficiary of the trend, while big-ticket categories like construction, automotive, and travel weaken.
Ken Muench, CMO of Yum Brands, put the mechanism plainly in an interview with Axios: "In an unpredictable world, consumers are looking for small moments of control. Food has become one of the easiest places to get that back." Yum's 2026 Food Trends Report found solo dining orders up 52% since 2021, now accounting for 47% of quick-service visits. Separately, 43% of specialty beverages from quick-service restaurants are now purchased without food, which suggests drinks are already functioning as standalone acts of self-reward.
This is not indulgence as celebration. It is indulgence as regulation.
Stress that consumers cannot spend their way out of at the mortgage level gets spent against at the single-serve level. The mechanism is emotional before it is transactional.
The Emotional Readout in Social Data
Our corpus shows what that stress sounds like in consumers' own words. Cortisol conversation is at an all-time high as a share of wellness talk, roughly 2.5 times its 2023 level. Language about overstimulation and nervous system regulation has risen sharply year over year. Calming functional ingredients are up nearly 40% on share.
Consumers rarely post about tariffs. They post about being tired and wired, and they increasingly frame the answer as something you drink.
Cortisol conversation as a share of Brightfield Group's wellness corpus, 3-month rolling average.
That is the bridge most brands miss: the World Uncertainty Index and the cortisol timeline are the same chart at two altitudes. One measures the world's mood in analyst reports. The other measures it in shopping behavior and social conversation.
Stress-related vocabulary sized by share of conversation in Brightfield Group's wellness corpus.
What This Means for Functional Beverages
A functional beverage is arguably the perfect treatonomics product: a few dollars, visibly self-caring, health-aligned rather than guilt-inducing, and consumed as a moment of control in a day that offers few.
The demand side is already in our panel. Twenty-three percent of adults bought functional food or drink in Q1 2026, and another 36% say they want to, putting the combined purchase and interest figure at 59%. The outcomes they shop for skew calm: sleep (24%), stress reduction (22%), and relaxation (16%) lead the list.
59% of adults bought or want to buy functional food or drink. Only 3% name it as their go-to stress tactic. That gap is the opportunity.
High interest, early habit, a wide conversion runway. Yum Brands data showing that 43% of specialty beverages are purchased as standalone items suggests consumers are already rehearsing the behavior. The functional beverage category is positioned to capture it, but brands that do not explicitly connect their products to stress management and daily calm risk being invisible to the largest purchase driver in the market right now.
When the macro chart spikes, the wind-down aisle is downstream.
Uncertainty indexes will oscillate. The habit of metabolizing stress through small functional purchases looks stickier, because it survived the return to normal after every recent shock that created it. Brands that build that connection into their positioning now will be better placed when the next reading arrives.
Want to see what uncertainty is doing to your shelf? We connect macro sentiment to category and brand movement across survey and social data.
Updated: 07/20/2026