Bioglan Active Magnesium 1000
One tablet gives you 334.1 mg of magnesium. Most of it adds up (85 %). It costs $0.037 per 100 mg at the regular price.
mostly adds up · 85 % 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 (as Magnesium phosphate pentahydrate 242.02mg) 50mg, Magnesium (as Magnesium amino acid chelate 250mg) 50mg, Magnesium (as Magnesium citrate 161.3mg) 25mg, Magnesium (as heavy Magnesium oxide 346.69mg) 209.12mg, Total elemental Magnesium 334.12mg”
- Compound per serve
- 1,000 mg in total across 4 compounds, listed below
- Magnesium per serve
- 334.12 mg
- Serve
- 1 tablet, 250 serves per pack, tablet
- Compounds listed
- heavy Magnesium oxide: 346.69 mg (stated as 209.12 mg magnesium)
- Magnesium phosphate pentahydrate: 242.02 mg (stated as 50 mg magnesium)
- Magnesium amino acid chelate: 250 mg (stated as 50 mg magnesium)
- Magnesium citrate: 161.3 mg (stated as 25 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
- Bioglan 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.
- Heavy Magnesium oxide: 60.3 % magnesium
- Magnesium phosphate pentahydrate: 20.7 % magnesiumThe brand’s product page names this version (“pentahydrate”), so we use its 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 citrate: 16.2 % magnesiumThis name covers more than one version, and the brand’s product page doesn’t say which. We use our standard one.
Our maths
Heavy Magnesium oxide 346.69 mg → about 209.1 mg magnesium ✓
Show the chemistry
346.69 mg × 0.603 = 209.1 mgVersion used: magnesium oxide (MgO, molar mass 40.30 g/mol), share 0.603. reference (opens in a new tab)
Magnesium phosphate pentahydrate 242.02 mg → about 50 mg magnesium ✓
Show the chemistry
242.02 mg × 0.2066 = 50 mgVersion used: trimagnesium phosphate pentahydrate (Mg3(PO4)2.5H2O, molar mass 352.93 g/mol: 72.915 / 352.93 = 0.2066), share 0.2066. (worked out from standard atomic weights)
Other versions: trimagnesium phosphate, anhydrous 0.2774; trimagnesium phosphate octahydrate 0.1792.
Magnesium amino acid chelate 250 mg → can’t work out: no standard share
Show the chemistry
The stated 50 mg from 250 mg would mean a share of 0.2.
Magnesium citrate 161.3 mg → about 26.1 mg magnesium ✓
Show the chemistry
161.3 mg × 0.1616 = 26.1 mgVersion used: trimagnesium dicitrate, anhydrous (Mg3(C6H5O7)2, molar mass 451.11 g/mol), share 0.1616. reference (opens in a new tab)
Other versions: magnesium citrate 1:1, MgHC6H5O7, anhydrous 0.1134; trimagnesium dicitrate nonahydrate 0.1189.
Total: can’t be worked out
Do the figures agree?
heavy Magnesium oxide: stated 209.12 mg, our maths 209.1 mg (0 %) ✓Magnesium phosphate pentahydrate: stated 50 mg, our maths 50 mg (0 %) ✓Magnesium amino acid chelate: stated 50 mg; can’t check, no standard shareMagnesium citrate: stated 25 mg, our maths 26.1 mg (-4.1 %) ✓parts add up to 334.12 mg = stated total 334.12 mg ✓checked: 284.12 of 334.12 mg = 85 %mostly adds up · 85 %
Mostly. The brand’s product page gives a weight and a magnesium figure for each of the 4 compounds. The magnesium figures add up to the stated 334.12 mg. We can check 3 of them, and each is within 15 % of our maths. Together they’re 284.12 mg, or 85 % of the magnesium. The other 50 mg is from a chelate, and only the brand knows its exact make-up. Why it matters to you: most of the magnesium behind the cost per 100 mg rests on figures that agree. The rest rests on the stated figure alone. It isn’t a lab test of what’s inside.
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 Chemist Warehouse 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: Regular price $30.99 · 250 tablets · Chemist Warehouse · 27 Oct 2026.
$30.99 ÷ 250 serves = 12.4c a tablet12.4c ÷ 334.1 mg × 100 = $0.037 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 |
|---|---|---|---|---|---|---|
| Chemist Warehouse (opens in a new tab)price used above | Regular price | $30.99 for 250 tablets | 12c | $0.037 | 27 Oct 2026 | Page prints "Don't Pay EDLP $30.99" (EDLP: the retailer's everyday shelf price); no RRP printed. Promotional price $23.99 shown (not used). |
| Chemist Warehouse (opens in a new tab)not used | Earlier observation (price type not recorded) | $30.99 for 250 tablets | not used | not used | 26 Oct 2026 | 250 tablets 'Exclusive Size'. No RRP shown. |
Notes
The Chemist Warehouse listing of the 250-tablet pack prints the same panel and notes a ‘large tablet size’. The brand’s page says to take 1 tablet daily.
Corrections
- 27 Oct 2026: Label source changed from the Chemist Warehouse listing of the 250-tablet pack (Chemist Warehouse listing, 250 tablets (opens in a new tab)) to the brand's own product page (Bioglan product page (opens in a new tab)), read 27 Oct 2026; a brand's page ranks above a retailer listing. The brand page is for the 150-tablet pack and prints the same panel. Figures unchanged: total elemental magnesium 334.12 mg from four compounds (1000 mg in all). Compound wording updated to the brand page's panel text.
Sources we opened
- Chemist Warehouse listing, 250 tablets (opens in a new tab)
- Bioglan product page (opens in a new tab)
Added 26 Oct 2026. Figures last read 27 Oct 2026.