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Condition

Type 2 diabetes

Type 2 diabetes is a condition where blood sugar stays too high because the body becomes less sensitive to insulin. It raises the risk of cardiovascular disease, kidney damage and early death.

Type 2 diabetes at a glance

PreventableYes, with lifestyleStrong
ReversibleSometimes, with major weight lossModerate
RiskHeart, kidneys, eyes
MeasureHbA1c or fasting glucose
70 studies10 answersupdated Nov 2026
Evidence per claim
Keeping blood sugar low pays off, even without diabetes
View evidence →
Moderate
Lots of sugar is a risk factor, but not the only cause
View evidence →
Moderate
Prediabetes can be spotted and often reversed
View evidence →
Moderate
Some diabetes drugs are being studied for aging
View evidence →
Preliminary
Practical use

For whom

People with overweight, little activity, family history or prediabetes.

Not for whom

No need to panic over a slightly raised value: lifestyle has a large effect.

In practice

Weight loss, regular activity, more fibre and fewer fast sugars; medication where needed.

Key caveats

Medication works alongside lifestyle, not instead of it.

What we know, and don't

Known

Lifestyle prevents or delays it
Major weight loss can reverse early diabetes
Blood sugar is easy to measure

Not yet

Who exactly achieves remission
The best drug order for lifespan
The effect of spikes in non-diabetics
Common misconceptions
"Sugar is the only cause."
Incomplete. Several factors play a role, including weight and activity.Moderate evidence
"Diabetes is always permanent."
False. Early type 2 diabetes is sometimes reversible.Moderate evidence
"You only need pills."
False. Lifestyle remains the basis of treatment.Strong evidence
Latest news on type 2 diabetes
HRT linked to lower mortality risk, but less so with impaired blood sugar8 NovDiet and exercise put diabetes into remission in younger adults31 OctLow-fat vegan diet improves blood sugar in type 2 diabetes18 Oct3D cell clusters improve diabetes drug testing8 OctGLP-1 combo helps patients with diabetes lose 23% bodyweight1 Oct
Heard on podcasts

What popular health podcasts claimed about type 2 diabetes, checked against the research.

ZOE · Tim Spector & Sarah BerryPartly
“Increasing whole grain consumption to around 75 grams per day reduces the risk of type 2 diabetes, cardiovascular disease and premature death by about 10%.”
What the research says →
Ben Greenfield Life · Gary BreckaPartly
“Type 2 diabetes develops in a hypoxic (oxygen-deprived) environment.”
What the research says →
ZOE · Luke O'NeillHolds up
“Inflammation reduces insulin sensitivity, which can lead to insulin resistance and type 2 diabetes.”
What the research says →
Type 2 diabetes: what's new, and what holds up

We follow the latest research on type 2 diabetes and listen to leading health podcasts, and we check what they claim. You'll get one email on Thursdays with what matters, and only when there's something new.

You can add more topics later, such as exercise or sleep.

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