Pourquoi le glucose compte
L’insulinorésistance s’installe pendant des années avant qu’une prise de sang ne la détecte. Ces guides expliquent ce qui se passe, ce qu’un capteur peut en montrer et ce qu’il ne peut pas, et où s’arrêtent les preuves. Chaque affirmation indique la solidité des preuves et cite l’étude dont elle provient.
Écrit à partir de la recherche, et non autour de la thèse de quelqu’un. Les chercheurs n’apparaissent que dans les références, et là où le domaine est réellement partagé, nous le disons plutôt que de choisir un camp.
Comment lire les étiquettes de preuve
Chaque affirmation de cette page porte une étiquette indiquant le poids qu’elle peut supporter. Elle décrit la solidité du résultat, non le prestige de la revue.
- Preuves solidesUn grand essai randomisé, une cohorte suivie longtemps, ou la concordance de plusieurs d’entre eux.
- Preuves émergentesRéel, mais mince — petit, court, observationnel ou non encore répliqué.
- ContestéDes chercheurs compétents sont en désaccord. Nous ne tranchons pas à votre place.
Guides
- 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 × Preuves solidesMis à jour 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 × Preuves solidesMis à jour 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 × Preuves émergentesMis à jour 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 × Preuves solides2 × Preuves émergentesMis à jour 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 × Preuves solidesMis à jour 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 × Preuves solides1 × Preuves émergentesMis à jour 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 × Preuves solides5 × Preuves émergentesMis à jour 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 × Preuves solidesMis à jour 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 × Preuves solides2 × Preuves émergentes1 × ContestéMis à jour 2026-08-07