Ethical Nutrients Mega Magnesium (200 mg elemental per tablet)
One tablet gives you 200 mg of magnesium. Only 25 % of it can be checked, and that part adds up. It costs $0.27 per 100 mg at the RRP.
can’t check: compound unclear no testing claim found
Compare with another productMagnesium blends (mixed compounds): all 7 compared
What the brand’s product page says
- Compound, as written
- “Magnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate) 500mg Equiv. Magnesium 50mg; Magnesium amino acid chelate 750mg Equiv. Magnesium 150mg”
- Compound per serve
- 1,250 mg in total across 2 compounds, listed below
- Magnesium per serve
- 200 mg
- Serve
- 1 tablet, 240 serves per pack, tablet
- Compounds listed
- Magnesium amino acid chelate: 750 mg (stated as 150 mg magnesium)
- Magnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate): 500 mg (stated as 50 mg magnesium)
- Register entry
- No AUST L number shown on the brand’s product page. A register search on 27 Oct 2026 didn’t reach its entry page. That doesn’t mean it’s unlisted.
- Read from
- Ethical Nutrients product page (opens in a new tab) (brand site), read 27 Oct 2026
How much of the compound is magnesium
Only part of each compound is magnesium. Here’s that share for each one. Some compounds come in several versions, for example with water in the crystals. Each version has its own share.
- Magnesium amino acid chelate: no standard share. With no amino acid named, it could be any of several compounds, each with its own share.
- Magnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate): 11.7 % magnesiumThe brand’s product page names this version (“dihydrate”), so we use its share.
Our maths
Magnesium amino acid chelate 750 mg → can’t work out: no standard share
Show the chemistry
The stated 150 mg from 750 mg would mean a share of 0.2.
Magnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate) 500 mg → about 58.3 mg magnesium ✓
Show the chemistry
500 mg × 0.1166 = 58.3 mgVersion used: magnesium glycinate dihydrate (Mg(C2H4NO2)2.2H2O, molar mass 208.45 g/mol: 24.305 / 208.45 = 0.1166 (IUPAC standard atomic weights)), share 0.1166. (worked out from standard atomic weights)
Other versions: magnesium bisglycinate, anhydrous 0.141.
Total: can’t be worked out
Do the figures agree?
Magnesium amino acid chelate: stated 150 mg; can’t check, no standard shareMagnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate): stated 50 mg, our maths 58.3 mg (-14.2 %) ✓parts add up to 200 mg = stated total 200 mg ✓checked: 50 of 200 mg = 25 %can’t check: compound unclear
We can’t tell. The brand’s product page calls the compound “Magnesium amino acid chelate”. That name covers several compounds, each with a different share of magnesium. So there’s no single number to multiply by, and we can’t check the stated 200 mg. This is common, and it isn’t a mark against the product. Why it matters to you: cost per 100 mg still works. It uses the stated magnesium figure. If the exact compound matters to you, ask the brand which amino acid it uses. 25 % of the magnesium could be checked; that part adds up.
Third-party testing
no testing claim found
No testing claim or certificate on the brand’s product page. That’s true of most products here, and it isn’t a mark against this one. The TGA doesn’t check each product before it goes on sale. If batch testing matters to you, ask the brand.
Our note: Neither the brand’s page nor the Good Price Pharmacy listing mentions testing (both read 27 Oct 2026). A general look for HASTA (Human and Supplement Testing Australia) or Informed Sport listings or certificates found none; we haven’t yet looked by brand name.
Prices, and what the magnesium costs
Prices are the recommended retail price (RRP), or the regular shelf price where no RRP is shown. Sale and member prices aren’t used, so you may pay less.
Price used: RRP $32.50 · 60 tablets · Cincotta Chemist · 27 Oct 2026.
$32.50 ÷ 60 serves = 54.2c a tablet54.2c ÷ 200 mg × 100 = $0.27 per 100 mg of magnesiumWe use the stated magnesium, not our maths, because that’s the figure you’re given. The price used is the lowest current RRP or regular price we’ve seen, at any shop. The list starts with the lowest current cost per 100 mg; earlier prices follow. Rows marked “Earlier observation (price type not recorded)” were seen up to 27 Oct 2026, before we switched to RRP. Some were sale prices. They stay here, greyed, as history, and no figure uses them.
| Retailer | Price type | Price and pack | Per serve | Per 100 mg | Seen | Note |
|---|---|---|---|---|---|---|
| Cincotta Chemist (opens in a new tab)price used above | RRP | $32.50 for 60 tablets | 54c | $0.27 | 27 Oct 2026 | 60 tablets. Page prints 'RRP $32.50' and 'Save $3.51 off RRP'; selling price shown was $28.99 (not used). Listed 'Low Stock'. Page carried no ingredient panel; used for price only. |
| Good Price Pharmacy (opens in a new tab)not used | Earlier observation (price type not recorded) | $41.95 for 240 tablets | not used | not used | 27 Oct 2026 | Page shows '$ 41 .95' then '$ 42 .00 off RRP'. On this site the second figure is the amount shown as off RRP; no RRP figure is printed. No member price shown.This note was corrected on 27 Oct 2026; see the corrections below. |
| Cincotta Chemist (opens in a new tab)not used | Earlier observation (price type not recorded) | $28.99 for 60 tablets | not used | not used | 26 Oct 2026 | 60 tablets. RRP $32.50, 'Save $3.51 off RRP'. Page carried no ingredient panel; used for price only. |
| Good Price Pharmacy (opens in a new tab)not used | Earlier observation (price type not recorded) | $41.95 for 240 tablets | not used | not used | 26 Oct 2026 | RRP shown as $42.00.This note was corrected on 27 Oct 2026; see the corrections below. |
Notes
The brand’s page prints no total, so 200 mg is its two magnesium figures added; it also has zinc, vitamin B6, chromium and selenium. It directs 1 tablet daily, or 3 a day for a second listed use.
Corrections
- 27 Oct 2026: Label source changed from the Good Price Pharmacy listing (Good Price Pharmacy listing, 240 tablets (opens in a new tab)) to the brand's own product page (Ethical Nutrients product page (opens in a new tab)), read 27 Oct 2026; a brand's page ranks above a retailer listing. Figures unchanged: 500 mg (magnesium 50 mg) and 750 mg chelate (magnesium 150 mg). The first compound, recorded from the listing as magnesium bisglycinate (Meta Mag, labelled magnesium diglycinate), is printed on the brand page as 'Magnesium glycinate dihydrate (Meta Mag® -Magnesium diglycinate)'.
- 27 Oct 2026: Price note corrected. The Good Price Pharmacy observation of 26 Oct 2026 ($41.95, 240 tablets) said 'RRP shown as $42.00'. Re-read 27 Oct 2026: the page shows '$ 41 .95 $ 42 .00 off RRP' and prints no RRP figure; on the same site that layout sits beside a separate 'Supplier's RRP' and shows the amount off RRP. $42.00 is the amount shown as off RRP, not the RRP. The price is unchanged. The 26 Oct 2026 entry is kept and a 27 Oct 2026 entry with the corrected note was added.
Sources we opened
- Cincotta Chemist listing, 60 tablets (opens in a new tab)
- Good Price Pharmacy listing, 240 tablets (opens in a new tab)
- Ethical Nutrients product page (opens in a new tab)
Added 26 Oct 2026. Figures last read 27 Oct 2026.