Magnesium Guide is an independent website that explains what the research says about magnesium supplements for people in the UK. It is written by one editor under a pen name, sells nothing, carries no adverts and takes no money or free products from supplement brands.
On this page
Why does this site exist?
Magnesium has become one of the best-selling supplements in Britain, sold for sleep, stress, cramps, migraines, energy and more. Some of those uses have reasonable trial evidence behind them. Others have very little. Labels make it hard to tell how much magnesium you are actually getting, and most of what you find online is written by the companies selling it.
We wanted one place that answers the practical questions plainly: do you need it, which form, how much, and what will it realistically do.
Who writes it?
The editor writes under the pen name Nell Hartley. Nell is not a doctor, pharmacist or registered dietitian, and the site does not give personal medical advice. We are looking for a qualified reviewer for the health pages. Until then, no page claims to be medically reviewed.
How is the site paid for?
At the moment it isn’t: the editor covers the small running costs. If that changes, for example through clearly labelled affiliate links, we will say so on this page and on every page that carries them, and it will never change an evidence grade.
What will we never do?
- Accept payment, free products or “sponsored” content from supplement companies.
- Rank or recommend a brand because someone asked or paid.
- Present an animal study, a manufacturer’s press release or a customer review as evidence that something works.
How do we decide what is true?
By reading the human trials and reviews, grading each claim on a published scale and linking every claim to its source so you can check it. Our editorial policy explains the process, including how we use AI tools and how we correct mistakes.
In this section
- Editorial policy: how every page is researched and checked
How Magnesium Guide picks sources, grades evidence, checks numbers, uses AI tools, handles conflicts of interest and corrects errors.
- How we grade the evidence for magnesium
The four evidence grades on Magnesium Guide, what each means, what we check in every trial and why magnesium needs extra care.
- Who writes Magnesium Guide
The people behind Magnesium Guide: who writes and edits it, and how health pages will be reviewed.
First published 4 November 2026. Spotted an error? Tell us and we'll correct it. Read our editorial policy.