Por qué importa la glucosa
La resistencia a la insulina se desarrolla durante años antes de que un análisis de sangre la detecte. Estas guías explican qué ocurre, qué puede mostrarte un sensor al respecto y qué no, y dónde se acaba la evidencia. Cada afirmación indica la solidez de la evidencia y cita el estudio del que procede.
Escrito a partir de la investigación, no en torno a la tesis de nadie. Los investigadores aparecen solo en las referencias, y donde el campo discrepa de verdad lo decimos en lugar de tomar partido.
Cómo leer las etiquetas de evidencia
Cada afirmación de esta página lleva una etiqueta que indica cuánto peso puede soportar. Describe la solidez del hallazgo, no el prestigio de la revista.
- Evidencia sólidaUn ensayo aleatorizado grande, un estudio de cohorte prolongado, o la coincidencia de varios de ellos.
- Evidencia preliminarReal, pero escasa — pequeña, breve, observacional o aún sin replicar.
- En disputaInvestigadores competentes discrepan abiertamente. No elegimos un bando por ti.
Guías
- What insulin resistance is, and why it starts before diabetes
Insulin resistance is your cells responding poorly to insulin, so your body makes more of it. Blood glucose can stay normal for years while this happens — which is exactly why it goes unnoticed.
3 × Evidencia sólidaActualizado 2026-08-07
- Glucose versus insulin: what a CGM does not show you
A continuous glucose monitor measures glucose in the fluid between your cells. It does not measure insulin. That gap decides what a normal-looking week can and cannot tell you.
2 × Evidencia sólidaActualizado 2026-08-07
- How to read your own glucose curve
Peaks, area under the curve, and the overnight baseline each tell you something different. Here is what a trace can support, and where people routinely over-read it.
3 × Evidencia preliminarActualizado 2026-08-07
- What the evidence actually supports for people without diabetes
The honest summary: strong evidence in diabetes, reasonable grounds in prediabetes, and thin evidence that a sensor improves health in people who are already metabolically healthy.
5 × Evidencia sólida2 × Evidencia preliminarActualizado 2026-08-07
- Time in range, and why it beats a single number
Time in range is the share of the day your glucose sits between 3.9 and 10.0 mmol/L. It carries information that an average cannot, and it has been validated against real complications.
4 × Evidencia sólidaActualizado 2026-08-07
- CGM accuracy: what MARD means, and what it hides
MARD is the average gap between a sensor and a laboratory blood test. It is the standard accuracy figure, it is genuinely useful, and it is routinely compared between studies that cannot be compared.
1 × Evidencia sólida1 × Evidencia preliminarActualizado 2026-08-07
- Food, movement, sleep and stress: what actually moves the curve
Four inputs change what a sensor shows you. The evidence behind them is not equally strong, and the one with the best evidence is the one people expect least.
1 × Evidencia sólida5 × Evidencia preliminarActualizado 2026-08-07
- Prediabetes: the window where a sensor earns its keep
Prediabetes is the stage where the numbers have moved but the outcome is not settled. Roughly as many people return to normal as progress — and what decides it is well established.
5 × Evidencia sólidaActualizado 2026-08-07
- Who should not bother with a CGM, and what to do instead
Some readers will get nothing from a glucose sensor that a cheaper test would not give them. Some need a different device from the one they are about to buy. Both are worth saying plainly.
3 × Evidencia sólida2 × Evidencia preliminar1 × En disputaActualizado 2026-08-07