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ConditionType 2 diabetes
Also: t2d
Last scientific update: jun 2026
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
Type 2 diabetes is largely preventable and, caught early, sometimes reversible with lifestyle.
37 studies5 answersupdated jun 2026
Evidence per claim
Keeping blood sugar low pays off, even without diabetes
View evidence →Lots of sugar is a risk factor, but not the only cause
View evidence →Prediabetes can be spotted and often reversed
View evidence →Some diabetes drugs are being studied for aging
View evidence →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.
Usual dose
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
How Type 2 diabetes connects