Zoe vs Levels (2026)

Zoe and Levels are the two consumer programmes most often weighed against each other when nutrition is the goal rather than glucose alone. They occupy adjacent shelves: Zoe runs a two-week CGM phase alongside a gut-microbiome test and a blood biomarker panel, then keeps you on personalised food rankings; Levels runs continuous CGM with the deepest meal-impact analysis on the market. The decision is between a multi-biomarker reset and ongoing glucose tracking.

VERDICT: TIE

They are different products. Zoe for a science-backed nutrition reset combining CGM + microbiome + blood biomarkers. Levels for ongoing glucose insight on the best CGM hardware.

Head-to-head breakdown

Continuous CGM use
Levels runs continuous CGM for as long as you subscribe. Zoe runs CGM for two weeks only — the data feeds the initial ranking model and then ends.
Levels
Sensor accuracy
Levels: Dexcom G7 (MARD ~8.2%). Zoe: Abbott Libre (MARD ~9–11%, older sensor variant). Levels has the more accurate sensor.
Levels
Multi-biomarker view
Zoe is the only programme combining CGM with gut-microbiome stool sampling and blood biomarker panels. Levels is glucose-only.
Zoe
Scientific lineage
Zoe runs on the published PREDICT-1/PREDICT-2 studies from King’s College London (Tim Spector). Levels has a credible medical advisory board but no equivalent published trial series.
Zoe
Personalised food rankings
Zoe’s personalised food scores are the centrepiece of the programme. Levels surfaces meal impact but does not rank foods against your own physiology long-term.
Zoe
Meal-impact analysis depth
Levels has the deeper per-meal analytics — AUC decomposition, food-by-food history, time-in-range. Zoe’s glucose analysis is lighter and ends after two weeks.
Levels
Raw glucose data export
Levels supports raw data export on request. Zoe does not export raw glucose at all.
Levels
Price (year 1)
Zoe: £300 setup + £60/mo × 12 = ~$1,250/year. Levels: $199/mo × 12 = ~$2,388/year. Zoe is cheaper year 1 but the CGM phase is shorter.
Tie

Choose Zoe

Choose Zoe if you want personalised nutrition grounded in real science — Tim Spector’s PREDICT studies — fusing CGM, gut microbiome and blood biomarkers into a single food-ranking model.

Choose Levels

Choose Levels if you want continuous CGM as a self-experimentation instrument — the deepest meal-impact engine on Dexcom G7, the most accurate consumer sensor.

The short version

Zoe is a nutrition programme that uses CGM as one input among three; Levels is a CGM programme. The decision is whether you want a one-time multi-biomarker reset or continuous glucose data.

When Zoe is the right pick

If you want personalised nutrition grounded in real published science — and the two-week CGM phase is enough — Zoe is the right shape. The PREDICT studies and the multi-biomarker model are the reason most users land here. The annual £60/month subscription buys you the food rankings, not new glucose data.

When Levels is the right pick

If you want CGM as an ongoing instrument — running meal experiments, tracking time-in-range as a daily metric, iterating on glucose curves week by week — Levels is the right shape. The deeper insight engine and the more accurate sensor justify the premium pricing for users who treat the device as a serious tool.

Common questions

Should I pick Zoe or Levels?

They solve different problems. Zoe is a 2-week multi-biomarker nutrition reset that turns into a personalised food-ranking subscription. Levels is ongoing CGM as a self-experimentation instrument. Pick on whether you want a one-time nutrition reset or continuous glucose data.

Is Zoe just a CGM programme?

No — that is the most common misconception. The CGM phase lasts two weeks; the programme is the multi-biomarker model fusing CGM + microbiome + blood biomarkers into personalised food rankings, which you keep through the subscription. If continuous CGM is what you want, Zoe is the wrong shape.

Which has more scientific backing?

Zoe, by a meaningful margin. The PREDICT-1 and PREDICT-2 studies from Tim Spector’s King’s College London group are published in Nature Medicine. Levels has a credible medical advisory board but no equivalent published trial series specific to the programme.

Can I do both Zoe and Levels?

Some users do — Zoe for the initial multi-biomarker reset, Levels for ongoing CGM after. The cost is the trade. For most users one programme is enough; pick on which job is the deciding one.