The Magic of Magnesium in Brewing Water: An Essential Ingredient for Great Beer

The importance of magnesium in brewing water cannot be overstated, as this essential ingredient plays a significant role in determining the taste and quality of the final product. In this blog post, we’ll dive into the world of magnesium and explore its significance in the brewing process.


Besides magnesium, there are several other important values to consider when it comes to brewing water, such as calcium, sodium, sulfate, chloride, and bicarbonate. These elements contribute to various aspects of beer taste and mouthfeel, ultimately affecting the overall brewing outcome.

How would pure magnesium taste like?

Pure magnesium would have a slightly bitter taste, but it’s important to note that it’s not typically consumed in isolation. In the context of brewing water, magnesium works in harmony with other minerals, and its taste characteristics become less discernible.

Influence on beer taste

Magnesium plays a crucial role in beer taste, as it acts as a cofactor for enzymes involved in the fermentation process. Moreover, it influences yeast health and performance, which in turn affects the production of various flavors and aromas. Additionally, the presence of magnesium can also contribute to a slight bitterness in the final product.

A few examples of magnesium levels in brewing water

Some ingredients that contain high amounts of magnesium include mineral-rich water sources, like well water or certain spring waters. For instance, the famous Pilsen water in the Czech Republic has low magnesium levels (around 2 ppm), which contributes to the unique characteristics of Pilsner beers. On the other hand, Burton-on-Trent in England is known for its high magnesium levels (around 20 ppm), which plays a role in the distinct flavor profile of English Pale Ales.


In conclusion, magnesium is an essential ingredient in brewing water that influences yeast health, fermentation efficiency, and the overall taste of beer. Understanding the role of magnesium and other minerals in brewing water is key to crafting delicious and well-balanced beers. So the next time you enjoy a refreshing brew, take a moment to appreciate the magic of magnesium in your glass. And if you’re interested in learning more about brewing water chemistry, check out our article on the importance of water hardness in the brewing process (TODO: Insert link to related article here).

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