✶ Written by an AI · fact-checked before publication
Every claim in Magnesium: More Hype Than Miracle, checked
This is the book's verification ledger, published in full. Every factual claim was extracted from the manuscript and handed to an independent blind checker — one claim, its cited source, nothing else. High-stakes claims (doses, safety, real diseases, trial numbers) were checked by three checkers who had to agree. Every checker first had to confirm the cited source actually exists.
50claims checked
48verified first pass
2flagged & corrected
The honest part: 2 claims did not survive first contact with their own sources — the checkers flagged them as misstated or unsupported. Each one was corrected in the text and re-verified by a fresh blind panel before the book was published. The table below shows the first-pass verdicts, because that's the honest number: what the machine got wrong before checking, not after.
| id | claim as written | stakes | first-pass verdict |
|---|---|---|---|
| C01 | Magnesium is marketed for at least six things at once: sleep, anxiety/"calm," energy, leg cramps, blood sugar/metabolic health, and "nervous-system regulation" (docket of 8 claims in Ch2) | low | verified |
| C02 | Fastest-growing supplement on Amazon through 2025, up ~40% year on year, with "glycinate" pulling ~a quarter-million searches/month | high | unsupported → corrected |
| C03 | Global magnesium-supplement market valued at roughly US$11 billion | high | verified |
| C04 | When one cheap substance is credited with fixing a long list of unrelated symptoms, that pattern reflects marketing, not settled biology | low | verified |
| C05 | The "magnesium is a cure-all" frame is not supported by the evidence base | low | verified |
| C06 | The evidence on magnesium (trials, absorption, Cochrane reviews, nutrient guidelines) is available free in public on good websites; a public dated corrections page exists at jameswhitfieldauthor.com/corrections | low | verified |
| C07 | Magnesium reliably helps mainly if you're actually deficient, or if you're an older adult with insomnia | high | misstated → corrected |
| C08 | Magnesium is involved in more than 300 enzyme reactions in the body | high | verified |
| C09 | Magnesium is a real essential mineral; the body can't make it and must get it from food | low | verified |
| C10 | The adult magnesium target is around 310–420 mg a day depending on age and sex | high | verified |
| C11 | The claims that survive do so only under conditions most buyers don't meet | low | verified |
| C12 | Sleep signal is real but modest, strongest in older adults with insomnia (faster sleep onset, slightly better sleep); trials small/short/low-quality; a 2021 systematic review pooled insomnia trials and found evidence too weak/low-certainty | high | verified |
| C13 | The claim splits into "helps if deficient" (often true) vs "helps everyone" (almost never proven); marketing sells the second on evidence for the first | low | verified |
| C14 | No clinical practice guideline (Australian or international) recommends magnesium as a treatment for anxiety | high | verified |
| C15 | Human evidence for magnesium reducing clinical anxiety is weak and low-quality; a 2017 review found it suggestive, not established | high | verified |
| C16 | A Cochrane review found magnesium barely beats placebo for muscle cramps, and no better than placebo for ordinary idiopathic/older-adult cramps | high | verified |
| C17 | For pregnancy-associated cramps the evidence is conflicting and low-certainty; Cochrane won't call it a win | high | verified |
| C18 | Serum magnesium reflects only about 1% of the body's magnesium (rest in bone and inside cells); a normal serum result can miss depletion | high | verified |
| C19 | True dietary magnesium deficiency in otherwise-healthy adults is less common than the marketing implies | low | verified |
| C20 | Magnesium is needed to make and use ATP (the body's energy currency) and plays a real role in glucose metabolism | high | verified |
| C21 | In healthy, non-deficient people, supplementation hasn't been shown to improve energy, reduce fatigue, or improve blood-sugar outcomes; signals come from deficient/diabetic populations | high | verified |
| C22 | Benefits found in sick/deficient trial populations get generalised and sold to healthy readers to whom they don't apply | low | verified |
| C23 | The difference between forms is mostly absorption and GI tolerability; glycinate is well tolerated/gentler on the gut; its "calm" branding rests on glycine's theorised calming effect (a hypothesis) | low | verified |
| C24 | There are no robust head-to-head trials showing glycinate outperforms other forms on any clinical outcome (sleep, anxiety, etc.) | high | verified |
| C25 | Magnesium citrate is well absorbed and cheap, about as reasonably evidenced as any form | low | verified |
| C26 | At higher doses citrate pulls water into the bowel and acts as an osmotic laxative; used as laxative and colonoscopy bowel prep | high | verified |
| C27 | Magnesium oxide is cheapest and genuinely poorly absorbed (smaller fraction reaches bloodstream) | high | verified |
| C28 | Oxide is still effective as a laxative and can correct a genuine deficiency; poor absorption is why it works as a laxative | high | verified |
| C29 | Threonate's brain-penetration and cognition claims rest almost entirely on animal studies and a handful of small early human trials; foundational work done in rats | high | verified |
| C30 | Magnesium L-threonate is reliably among the most expensive forms per dose | low | verified |
| C31 | Malate (energy) and taurate (heart/calm) claims are built on thin human evidence and are largely mechanistic inference; human trials sparse to near-absent | low | verified |
| C32 | The forms with least proof behind headline claims (threonate, taurate, malate) cost the most; cheap well-evidenced ones (citrate, oxide) are treated as unglamorous | low | verified |
| C33 | Leafy greens, legumes, nuts, seeds, and wholegrains are the richest ordinary magnesium sources | low | verified |
| C34 | Meeting magnesium needs through food is the best-supported strategy for a healthy adult by a wide margin | low | verified |
| C35 | Correcting a genuine, diagnosed deficiency is the scenario where supplementation reliably helps (strongest grade) | low | verified |
| C36 | Long-term proton-pump-inhibitor ("-prazole") use is an established cause of low magnesium over time; regulators have flagged it | high | verified |
| C37 | Loop and thiazide diuretics make kidneys shed more magnesium in urine and can lower levels | high | verified |
| C38 | Chronic heavy alcohol use is a well-recognised cause of magnesium depletion (poor intake, gut and kidney losses) | high | verified |
| C39 | Conditions impairing absorption — coeliac, Crohn's, chronic diarrhoea, after bariatric surgery — predispose to magnesium deficiency | high | verified |
| C40 | Ageing raises risk: intake drops, gut absorbs less, kidneys retain less, more people on the listed medications | high | verified |
| C41 | Self-correcting with a supplement can paper over a low reading and hide the underlying cause | low | verified |
| C42 | In reduced kidney function the body can't clear excess magnesium and it can build to genuinely hazardous/dangerous levels | high | verified |
| C43 | The tolerable upper limit for supplemental magnesium is around 350 mg a day; food magnesium isn't counted | high | verified |
| C44 | Excess supplemental magnesium commonly causes diarrhoea/GI upset; real toxicity (dangerously high blood magnesium) is rare with normal kidney function and concentrated in renal impairment | high | verified |
| C45 | The people who most genuinely need magnesium are almost never the ones buying threonate off short videos | low | verified |
| C47 | Three questions to test any claim: deficient vs everyone; proven outcome vs mechanism; sick-study vs healthy-you | low | verified |
| C48 | Three marketing "moves" turn a true fact into a false promise (sick-to-healthy generalisation; small-signal-to-proven; mechanism-to-outcome) | low | verified |
| C49 | Self-treating anxiety/serious symptoms with magnesium instead of getting assessed is the top-ranked harm — a delay, not the pill | high | verified |
| C50 | Mega-dosing with unrecognised kidney impairment is a ranked harm; "more is better, harmless" fails when kidney function is reduced | high | verified |
| C51 | A risk-group reader told "everyone's fine, just supplement" papers over a symptom and never finds why they were low | high | verified |
Ledger exported 2026-07-23. Found something we still got wrong? Tell us — corrections happen in the open. How the books are made: the honest method.