Read the magnesium line, then compare the real price
Glycinate, citrate, oxide, threonate. The big number on the front of the bottle is often the whole compound, not the magnesium. This guide shows the line that counts, prices 30 products per 100 mg, and checks popular health claims against published studies.
The 3 questions this guide answers
- Which number on the label is actual magnesium, and how can you tell when "glycinate" is mixed with oxide?
- What did 30 brand-store prices come to per 100 mg of magnesium on 21 Oct 2026?
- What do published studies say about sleep, migraine, blood pressure, cramps, and sprays?
30-page PDF, 3 printable pages, and an Excel tracker. Instant download.
What's inside (30-page PDF + spreadsheet)
- Label math. Why "1,500 mg" on the front of a real taurate bottle is 120 mg of magnesium on the Supplement Facts panel. NIH says that panel states elemental magnesium, not the weight of the whole compound.
- A 60-second check for buffered glycinate. Three steps, with labels we read on 21 Oct 2026, for products that mix glycinate with cheaper oxide.
- 30 products by cost per 100 mg. Brand-store prices checked 21 Oct 2026, from about $0.03 to $1.16, with links and the label source. Eight more products are listed with the reason we could not do the math.
- Form cards for glycinate, citrate, oxide, malate, chloride, taurate, threonate, and others, tied to the absorption studies.
- An evidence chapter on sleep, anxiety, depression, blood pressure, migraine, blood sugar, cramps, threonate, and sprays. Small studies and industry ties are named. Sources are NIH, PubMed-indexed papers, and USDA.
- Food first, with the NIH food table and what 100 mg of magnesium cost from seven everyday foods.
- Printables and an Excel tracker. A shopping checklist, a label worksheet, two-week notes for your clinician, and a calculator for your own bottles.
Try it first: free 4-page sample
The sample cover, the label-math page, the buffered-glycinate check, and a page on what the full guide includes. No email needed.
Download the free sample (PDF, 4 pages)
Get the full guide, $7 on Payhip Instant download. Sold through Payhip, which handles checkout and EU/UK VAT. 14-day refund: email [email protected].
Who it's for, and who it isn't
For adults who want to compare magnesium forms, labels, and prices before they buy. Not a dosing plan, a diagnosis, or medication advice. It does not tell you which magnesium to take or how much. Prices are US brand-store prices from 21 Oct 2026, and your store will differ.
Made by Renvo Life. No brand paid to appear and there are no affiliate links in the guide. Want occasional emails about price drops? Join the newsletter (optional).
Magnesium forms on one page
How much of each form is actual magnesium (oxide ≈60%, citrate ≈16%, glycinate ≈14%, threonate ≈7–8%) and what the research says, in plain words. Free PDF. You also join the Renvo Life newsletter. We'll email you the link after you confirm.
Not medical advice.
Ready? $7, instant download
30-page PDF, 3 printable pages, and an Excel tracker.
For a bottle of your own, enter its price, servings and elemental magnesium in the magnesium cost per 100 mg calculator.
Reading about magnesium and sleep? See does magnesium help you sleep? What the research found.
FAQ
Does it tell me which magnesium to take, or how much?
No. It explains forms, labels, prices, and what published studies found, and your doctor or pharmacist is the person to ask about your own situation. The only reference numbers we quote are NIH's, including the supplement upper limit, and those numbers are not a dose to copy.
Are the prices current?
Each price is the brand's own web-store price on 21 Oct 2026, before shipping, tax, or coupons. Prices change. The spreadsheet lets you type in today's price.
Is a brand paying for this?
No. No brand paid to appear, and the guide has no affiliate links.
Can I get a refund?
Yes, within 14 days. Email [email protected].
Is this medical advice?
No. Not medical advice: it is a shopping and evidence guide, so ask your doctor or pharmacist about your own health, kidneys, pregnancy, and medicines.
Health disclaimer. Not medical advice. This page and the guide compare labels, prices, and published studies. They do not diagnose, treat, or prescribe. They do not give a dosing plan or medication instructions, and they promise no health result. Talk with your doctor or pharmacist before starting a supplement, especially if you have kidney disease, are pregnant, or take prescription medicines. Do not stop or change a medicine because of anything here.
We may earn a commission from links on this page. How we make money
Last updated 30 Oct 2026