Continuous glucose monitors went from "diabetes management tool" to "consumer wellness product" remarkably fast. Abbott launched Lingo in 2024. ZOE expanded its programme. By the end of 2025 you could buy a CGM in a London Boots without anyone batting an eyelid.
The question worth asking before any of this is: what specific question are you actually trying to answer? If you're a healthy adult curious about how your body responds to specific foods, a one-month CGM is genuinely useful — you'll learn things you didn't know. If you want to optimise nutrition long-term, the answer is probably CGM plus nutritionist, not CGM alone. If you're worried you might be developing diabetes, speak to your GP — the HbA1c blood test is the right diagnostic, not a consumer CGM. And if you just want a wellness gadget to talk about, your money is better spent elsewhere.
We wore three different consumer CGM products for a month each — Lingo, ZOE, and Levels — to find out where each one actually helps and where the marketing oversells.
The honest finding upfront
CGMs are useful as a four-week one-off learning experience for healthy adults curious about their food-glucose response. They're probably not useful as an ongoing subscription — most of the practical learning happens in the first month and plateaus quickly after that.
If you have actual diabetes or pre-diabetes, a clinically-prescribed CGM (Dexcom G7, FreeStyle Libre, etc.) — typically NHS-funded if eligible — is the right path. Not a consumer wellness CGM.
Lingo (Abbott) — the clean entry point
Abbott's Lingo is essentially the consumer-facing version of the FreeStyle Libre that diabetes patients use clinically. The sensor is the same hardware; the app is consumer-flavoured. Costs £79/month for two 14-day sensors.
What's good: genuinely useful glucose data, accurate enough for what you'd use it for as a healthy adult. Sensors are unobtrusive — applied to the back of the upper arm, painless, you forget they're there. Abbott is a serious medical device manufacturer; the data and reliability are real. The 28-day learning experience is genuinely valuable; you'll discover things about your own glucose response that surprise you.
What's not good: £79/month is steep for ongoing use. The app is more limited than ZOE's, with less guidance on what to do with the data. No clinical follow-up included.
Best for: healthy UK adults wanting one focused month of glucose-response learning. Buy one month, stop.
£79/month subscription.
ZOE — the thorough (and expensive) option
ZOE bundles CGM with a gut microbiome test, blood lipid testing, and a nutrition coaching app, with weekly meal-by-meal guidance based on your data. Founded by King's College London researchers, ZOE has more research credibility than most consumer health programmes.
The price reflects the breadth: £299 sign-up for the testing kit plus £25/month for the coaching app, ongoing.
What's good: most thorough consumer programme — combines CGM, microbiome, lipids, coaching. Research-led; the team includes published nutrition researchers. Personalised meal recommendations based on your data. Genuine sustained behaviour change is more likely with ZOE than with Lingo alone.
What's not good: expensive at sign-up. Some of the microbiome science is still developing — a few claims feel ahead of the published evidence. Compliance is real work — daily logging, weekly weighing, photo of every meal.
Best for: UK adults willing to invest meaningfully in nutrition optimisation, with the discipline to use the programme as designed.
£299 sign-up + £25/month.
Levels — the disappointing one
Levels is a US-headquartered CGM-and-coaching service that's been available to UK customers via shipping in some periods. It's expensive (~£300/month equivalent), the app feels less polished than Lingo or ZOE, and the value proposition is unclear versus the alternatives.
I don't recommend Levels for UK customers in 2026. There's nothing it does that Lingo or ZOE doesn't do better at lower cost.
What we actually learned across two testers, three months
Two adult testers — one healthy, one with mild metabolic concerns. Three months between us. The honest takeaways:
- Both testers learned useful things about their food-glucose responses
- Neither sustained behaviour change beyond about six weeks post-CGM
- The "spike avoidance" wisdom mostly mapped onto things we already knew (eat more fibre, eat protein with carbs, walk after meals)
- One month of Lingo gave roughly 90% of the practical learning that two CGM-months gave
This matches what published research says about consumer CGM programmes for healthy adults: short-term learning is real; long-term behaviour change is harder, and not specifically about glucose data — it's about whether you'll change habits, which is harder than wearing a sensor.
How I'd actually advise picking
Healthy UK adult curious about glucose response: Lingo for one month, £79. Spend that month logging meals, noting glucose responses, identifying your specific spike-prone foods. Then stop the subscription.
Willing to invest in thorough nutrition coaching: ZOE. Worth the cost if you'll engage with the programme for at least 12 months.
Diabetes, pre-diabetes, or cardiovascular risk factors: see your GP first. The right CGM may be NHS-funded, and the clinical context for interpreting data is critical.
Wellness optimisation hobbyist on a budget: skip CGM. The same money buys a Whoop subscription that produces more behaviour-relevant data over a longer period.
This article is general health information, not medical advice. Consumer CGMs are not a substitute for clinical assessment of glucose metabolism. If you're concerned about diabetes or metabolic disease, please speak to your GP.
Affiliate disclosure: Morningfold has no affiliate partnership with Abbott Lingo or ZOE. Affiliate links exist with one alternative not recommended above. The fact that we're not recommending the affiliate product is the editorial point — see editorial standards.