Water With the Most Magnesium

The highest magnesium bottled waters ranked — led by Slovenia's Donat Mg at a world-record 1,050 mg/L. Compare the top high-magnesium mineral waters and pick the right magnesium water for your daily intake, digestion or post-workout recovery.

Why magnesium matters

Magnesium runs more than 300 enzymatic reactions in your body — energy production, protein synthesis, muscle contraction, nerve transmission and the regulation of blood pressure and blood sugar. Chronic shortfalls are linked to fatigue, cramps, poor sleep and elevated cardiovascular risk.

Daily requirements. The recommended dietary intake is 400–420 mg/day for adult men and 310–320 mg/day for adult women. Surveys in the US and Europe show roughly half of adults fall short. Magnesium-rich mineral water is one of the most bioavailable ways to close the gap.

#	Brand	Country	Magnesium (mg/L)	Calcium	TDS
1	Donat Mg	Slovenia	1,050	380	13,200
2	Apollinaris	Germany	130	90	2,650
3	Gerolsteiner	Germany	108	348	2,500
4	Badoit	France	85	190	1,200
5	Contrex	France	74.5	468	2,078
6	San Pellegrino	Italy	53.5	178	950
7	Vittel	France	43	240	841
8	Römerquelle	Austria	30	120	600
9	Evian	France	26	80	357
10	Liquid Death	Austria	22	56	260

#1 Donat Mg — 1,050 mg/L Mg

World's most magnesium-rich bottled water. Marketed as a functional digestive water across Central Europe — a single 250 ml glass delivers ~60% of an adult's daily magnesium.

#2 Apollinaris — 130 mg/L Mg

Historic Bad Neuenahr source — highest magnesium of any major sparkling brand. Strongly carbonated, alkaline-buffering bicarbonate at 1,810 mg/L.

#3 Gerolsteiner — 108 mg/L Mg

Volcanic Eifel sparkling water — the best-balanced high-magnesium pick, with serious calcium and bicarbonate alongside.

#4 Badoit — 85 mg/L Mg

Saint-Galmier sparkling mineral water — fine bubbles, high bicarbonate (1,300 mg/L), French haute-cuisine staple.

#5 Contrex — 74.5 mg/L Mg

Still mineral water from the Vosges — the only still water on this list, with the world's highest calcium content as a bonus.

Best magnesium water overall: Donat Mg

Donat Mg from Rogaška Slatina, Slovenia is the world's most magnesium-rich bottled water — 1,050 mg/L, an order of magnitude above any competitor. Bottled since 1908 and sold across Slovenia, Austria, Hungary, Italy and Germany as a functional therapeutic water, it's typically consumed in 200–300 ml glasses rather than as all-day hydration.

For more accessible all-day options that still deliver meaningful magnesium, Gerolsteiner (108 mg/L) and Apollinaris (130 mg/L) are the best balanced picks — both available in supermarkets worldwide.

Frequently Asked Questions

Which bottled water has the most magnesium?

Donat Mg from Slovenia is the magnesium champion at 1,050 mg/L — nearly 10× the next highest. Among more widely available brands, Apollinaris (130 mg/L) and Gerolsteiner (108 mg/L) lead. A single liter of Donat Mg covers an adult's full daily magnesium requirement; one liter of Apollinaris or Gerolsteiner covers about 30%.

Why does magnesium in water matter?

Magnesium supports energy metabolism, muscle and nerve function, blood-pressure regulation and heart rhythm. The RDI for adults is 320–420 mg/day, and surveys consistently show ~50% of adults fall short. Magnesium in water is highly bioavailable — absorbed as efficiently as magnesium from supplements.

What is Donat Mg water?

Donat Mg is a naturally carbonated mineral water from Rogaška Slatina, Slovenia, bottled since 1908. It carries 1,050 mg/L of magnesium and 7,790 mg/L of bicarbonate — both world records — and is sold across Europe specifically as a functional water for magnesium intake and digestive comfort. It's typically drunk in 200–300 ml glasses rather than as everyday hydration.

Is high magnesium water safe to drink daily?

For most healthy adults, yes — magnesium has a wide safety margin and excess is excreted in urine. Functional waters like Donat Mg are best consumed in 200–500 ml doses rather than as the only daily hydration. People with kidney disease should consult a doctor before regularly consuming very high-magnesium waters.

What's the best magnesium water for athletes?

Gerolsteiner is the best all-round athletic pick — 108 mg/L magnesium plus 348 mg/L calcium, 118 mg/L sodium and 1,816 mg/L bicarbonate, ideal for post-workout electrolyte recovery without overloading on sodium. Donat Mg is the strongest single magnesium dose if cramping is the issue.