Magnesium Glycinate comparison: lab tests, heavy metals and price (UK + EU)

2 products, 1 with a published independent lab report. Figures come only from published reports and seller pages; “—” means we have no data, never an estimate.

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			Heavy metals (mg/kg)				Purity	Form & serving		Sellers	Caveats
							Purity	Form & serving		Sellers	Caveats
HSN Magnesium Glycinate (Chelated) 500g	HSN	Lab verified · 2025-08-07 · Report AGROLAB Ibérica S.L.U., Burgos (ENAC, ISO/IEC 17025:2017)	<0.020	<0.020	<0.010	<0.020	Label: Unknown No fillers: Yes	Magnesium bisglycinate (chelate) powder 3 g per day (2 × 1.5 g): 330 mg magnesium (88% NRV)	€0.15/day (EU) calculated: €25.19 ÷ 167 · 3 g a day · sale price (regular €44.99)	EU HSN product page (hsnstore.eu)	HSN: AGROLAB report, pure 11%.
Peak Supps Magnesium Glycinate 500g	Peak Supps	Unverified: brand claim only	—	—	—	—	—	—	£0.13/day (UK) calculated: £20.99 ÷ 167 · 3 g a day	UK Peak Supps	Pure, supplier CoA only; batch report requested 14 Oct 2026.

Pb = lead, Cd = cadmium, Hg = mercury, As = arsenic, all in mg/kg. EU limits for food supplements: Pb 3.0, Cd 1.0, Hg 0.10. “<” means below the lab’s detection limit. Pass* = certificate states compliance without a figure. — = no data.

HSN Magnesium Glycinate (Chelated) 500g

Brand: HSN
Lab-test status: Lab verified · 2025-08-07 · Report
AGROLAB Ibérica S.L.U., Burgos (ENAC, ISO/IEC 17025:2017)
Heavy metals (mg/kg): Pb <0.020Cd <0.020Hg <0.010As <0.020
Purity: Label: Unknown
No fillers: Yes
Form & serving: Magnesium bisglycinate (chelate) powder
3 g per day (2 × 1.5 g): 330 mg magnesium (88% NRV)
Price per daily dose: €0.15/day (EU)
calculated: €25.19 ÷ 167 · 3 g a day · sale price (regular €44.99)
Sellers: EU HSN product page (hsnstore.eu)
Caveats: HSN: AGROLAB report, pure 11%.

Peak Supps Magnesium Glycinate 500g

Brand: Peak Supps
Lab-test status: Unverified: brand claim only
Heavy metals (mg/kg): Pb —Cd —Hg —As —
Purity: —
Form & serving: —
Price per daily dose: £0.13/day (UK)
calculated: £20.99 ÷ 167 · 3 g a day
Sellers: UK Peak Supps
Caveats: Pure, supplier CoA only; batch report requested 14 Oct 2026.

EU 2023/915 limits for food supplements: lead 3.0, cadmium 1.0, mercury 0.10 mg/kg. “Pass (no value)” means the certificate states compliance without a figure. Prices were seen on seller pages when checked and can change; currencies differ, so compare within one currency.

Not medical advice. Testing status can’t be bought; seller links may be affiliate links (see disclosure). Disclosure

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