What changed in UK shopping habits?
Weight-loss medications like Wegovy and Mounjaro are reshaping how millions of UK consumers spend their money. A new study from Worldpanel by Numerator reveals that households with at least one GLP-1 user spent on average £418 less on groceries in the year after starting the medication, compared to non-users. That adds up to an estimated £780m drop in national grocery spending.
Why this matters for your business: If you sell food, beverages, or personal care products, these shifts aren't a fad—they represent a structural change in consumer behavior driven by a rapidly growing user base (over 2 million in the UK).
How spending patterns are shifting
What users buy less of
Users cut back on calorie-dense, processed foods. The Cornell University study found a 10% reduction in savoury snacks, and less spending on chocolate, pastries, cheese, butter, soft drinks, and eggs. Alcohol consumption also dropped. Eating out declined: nearly two-thirds of users reduced meals out, and fast-food/coffee shop spending fell 8%.
What users buy more of
Spending increased on fruit, protein-rich foods like prawns, and yoghurt. Interestingly, users also bought more chewing gum, mouthwash, and hair dyes—products that counter common side effects like bad breath and thinning hair.
Strategic implications for businesses
Food and beverage companies
Indulgent snack and alcohol brands face a sustained demand decline from this segment. Meanwhile, health-focused products (protein, yoghurt, fruit) have a growing, loyal customer base. Retailers should consider dedicated sections or promotions for GLP-1-friendly foods.
Restaurants and fast food
With an 8% spending drop from users, quick-service restaurants may need to offer lighter, protein-rich options to retain this demographic. Mindful eating is becoming a lasting habit—over half of users describe their approach as 'mindful.'
Personal care and pharmacy
Mouthwash, chewing gum, and hair dye sales are rising. Brands in these categories should target GLP-1 users with specific messaging about side-effect management.
The cost barrier and churn risk
Despite the savings on groceries, the medication itself is expensive—over £300 per month privately. A Zava survey found cost is the #1 reason users stop. When they stop, spending patterns revert to pre-adoption levels, and even shift toward slightly less healthy baskets. This creates volatility: the market segment is real but not permanent for every user.
Who wins and who loses
Winners: Pharmaceutical companies (Novo Nordisk, Eli Lilly), health-focused food brands, and personal care companies targeting side effects.
Losers: Indulgent food manufacturers, fast-food chains, coffee shops, and alcohol producers.
Bottom line for executives
The GLP-1 user base is large and growing, but high discontinuation rates mean businesses should not over-invest in a single segment. Instead, adapt product lines and marketing to appeal to mindful eaters broadly, while monitoring churn. The shift is real, but it's not irreversible.
FAQ
Households with a GLP-1 user spend £418 less per year on groceries, totaling an estimated £780m drop nationally.
Users buy more fruit, protein-rich foods (prawns), yoghurt, chewing gum, mouthwash, and hair dyes.
Yes, Cornell research found households revert to pre-adoption spending patterns and even shift toward slightly less healthy baskets.
