Metformin and GlucoseA Reader's Guide

Editorial policy

How these guides are written and kept accurate

The rules this reader follows, so you can judge how much weight to give what you read here. Last updated 2026-10-22.

Medical notice

Everything on this site is general information about what public health agencies publish. It is not medical advice, it cannot take your history or results into account, and it is no substitute for the doctor, nurse or pharmacist who looks after you. If you have urgent symptoms, call 911 or your local emergency number.

Sources

Because these guides are about a medicine, they rely only on authoritative public health sources written for patients: MedlinePlus from the US National Library of Medicine, the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), the Centers for Disease Control and Prevention (CDC) and the US Food and Drug Administration (FDA). Blogs, forums, manufacturers, sellers and news stories are not used as the basis for any statement.

Every guide lists its sources and shows the date it was last reviewed against them. Where the sources are silent, the guides say so rather than filling the gap.

What we will not publish

  • Amounts, dose ranges, schedules or detailed instructions for taking any medicine.
  • Advice to begin, end, switch or change any treatment.
  • Tables of medicine interactions. These depend on the person, and your prescriber and pharmacist should check them.
  • Promotion of any use of a medicine beyond what the public health sources describe. Any other use is a decision for a prescriber.
  • Anything that sells, supplies or recommends a medicine, product or brand.

In one line

If the public health sources do not support a statement, it does not belong in a guide, and if a statement would change what someone does about their treatment, it belongs with their clinician.

Writing

  • Plain language, with medical terms explained the first time they appear.
  • Sources are paraphrased, not copied, and each statement is attributed to the agency that made it.
  • Worked examples are invented to illustrate a point. They describe no real person, and each is labelled as an example.

In this first edition, cited documents are named but not linked, so that every page can be reviewed before any outbound link is added. Any links added later will go only to pages that help the reader, and paid or sponsored links, if there ever are any, will be labelled as such.

Reviews and corrections

Public health guidance changes. Each guide shows the date it was last reviewed against its sources, and will be checked again when those sources change. A correction that changes the meaning of a guide will be noted at the end of that guide with the date. There is no contact route yet, so corrections currently come from that periodic re-checking rather than from reader reports.

Use of AI

The guides were drafted with an AI system from the cited documents and checked against the text of those documents as fetched on 2026-10-22. They have not had an independent human editorial review, and no clinician has reviewed them. The about page describes how the site was made.