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Two hours after eating — reference ranges
The post-meal value that matters diagnostically: by two hours, glucose should be most of the way back down.
| Faixa | mmol/L | mg/dL | O que significa |
|---|---|---|---|
| Normal | under 7.8 | under 140 | Two hours after a meal (or after the 75 g oral glucose tolerance test), a healthy response is back under 7.8 mmol/L. |
| Impaired glucose tolerance | 7.8-11.0 | 140-199 | "Prediabetes" by the two-hour criterion: the body clears the glucose, but slowly. |
| Diabetes | 11.1 or above | 200 or above | Two hours after a 75 g glucose load, 11.1 mmol/L or higher meets the WHO criterion for diabetes. |
Ler no contexto
The two-hour value is the one the oral glucose tolerance test (OGTT) uses: a measured 75 g glucose drink, blood drawn at two hours. A home meter reading two hours after a normal meal is a rough cousin — useful for trends, but only the standardised test counts for diagnosis.
The two-hour number catches a different problem than the fasting number: it is the first thing to move when glucose clearance slows, which is why some people have a normal fasting value and a diabetic two-hour value at the same time.
Quando ver um clínico
- Two-hour values at or above 11.1 mmol/L — book a formal test.
- Repeatedly 7.8-11.0 after normal meals — the earlier it is caught, the more reversible it is.
Só referência, não um diagnóstico. Os limiares desta página são valores OMS e ADA ao nível da população; o seu clínico interpreta os seus próprios números contra o seu histórico, medicamentos e outros exames. Se um valor vem com sintomas, ou continua a mover-se na direção errada, esse é o sinal para agir — não esta página.