Understanding the pH Scale
To grasp the significance of yerba mate's pH, it's helpful to understand the pH scale itself. The pH scale measures the concentration of hydrogen ions in a substance, indicating its level of acidity or alkalinity. It ranges from 0 to 14, where a pH of 7 is considered neutral, such as pure water. Any substance with a pH below 7 is acidic, with lower numbers indicating higher acidity, while a pH above 7 is alkaline, or basic.
- Acidity: Substances like lemon juice (pH ~2) and coffee (pH ~4.7-5) are acidic.
- Neutrality: Pure water has a neutral pH of 7.
- Alkalinity: Substances like baking soda (pH ~9) are alkaline.
The mild acidity of yerba mate, typically between 5.1 and 6.4 according to a 2025 study, positions it favorably for those seeking alternatives to highly acidic beverages. Other sources suggest its pH can be even higher, reaching near-neutral levels depending on preparation.
Factors Affecting the pH of Yerba Mate
Several variables can influence the final pH of your yerba mate infusion. Understanding these can help you fine-tune your brew for both taste and potential digestive comfort.
Brewing Method
Traditional brewing involves steeping the leaves in a gourd with hot, but not boiling, water and sipping through a filtered straw called a bombilla. Modern methods include using a French press, tea bags, or even cold-brewing (tereré). A 2014 study found that brewed yerba mate had a near-neutral pH (6.75-7.89), in contrast to lower pH values found in industrialized, ready-to-drink versions that often contain acidulants.
Water Temperature
Water temperature is a critical factor. Using water that is too hot (near boiling) can scorch the leaves, potentially releasing more bitter compounds and possibly affecting the pH. Cooler water temperatures, particularly for cold-brewing tereré, are generally associated with a milder, less acidic taste and potentially a gentler effect on the stomach.
Yerba Mate Variety and Processing
The specific variety of yerba mate (Ilex paraguariensis) and its processing methods can also play a role. Some producers, like Meta Mate, report differences in pH between traditionally processed and freeze-dried versions, with the latter showing a higher pH. The leaf-to-stem ratio also influences the final infusion, with higher leaf content potentially contributing to a stronger flavor and different pH.
Yerba Mate Acidity Compared to Other Beverages
For many, the appeal of yerba mate lies in its position as a less acidic alternative to popular drinks like coffee. The table below provides a quick comparison of average pH ranges.
| Beverage | Typical pH Range | Key Considerations |
|---|---|---|
| Yerba Mate | 5.1–7.1+ | Significantly less acidic than coffee, with variation based on brewing method. Often perceived as easier on the stomach. |
| Coffee | 4.5–5.0 | Noticeably more acidic, which can contribute to heartburn or indigestion in some individuals. |
| Black Tea | 4.9–5.5 | Similar in acidity to the lower end of yerba mate's range, but still more acidic than a traditionally brewed, near-neutral mate. |
| Green Tea | ~30-50mg caffeine per 8 oz cup | The caffeine content is lower than yerba mate, which can be beneficial for those sensitive to caffeine spikes. However, it may have a different effect on acidity depending on brand and brewing method. |
| Orange Juice | ~3.5 | Highly acidic, which can be problematic for tooth enamel and those with acid reflux. |
| Soda | ~2.5–3.5 | Very acidic, known for its negative impact on dental health and digestive comfort. |
| Pure Water | 7.0 (neutral) | The benchmark for neutrality, useful for comparing the acidity of other beverages. |
The Digestive and Dental Health Implications of Yerba Mate's pH
The milder acidity of brewed yerba mate is often cited as a benefit for digestive health. For those who experience heartburn or acid reflux from highly acidic drinks, yerba mate can be a gentler alternative. Furthermore, its saponins have anti-inflammatory properties that can support healthy digestion. However, excessive consumption, especially on an empty stomach, can still cause discomfort in sensitive individuals due to its caffeine content. Brewing with water at lower temperatures and opting for cold brew (tereré) can further minimize potential digestive upset.
Regarding dental health, the pH of a beverage is a crucial factor, as lower pH levels can lead to enamel erosion. Since brewed yerba mate generally has a higher pH than coffee and soda, it poses less of a risk for enamel erosion. Some studies even suggest that yerba mate may positively influence the oral microbiome, though further research is needed. Nevertheless, rinsing your mouth with water after consumption is a good practice to prevent any potential staining.
Conclusion: A Balanced Choice for the Discerning Drinker
The answer to "What is the pH of yerba mate?" reveals a beverage that is generally mildly acidic, often approaching neutrality, especially when brewed traditionally. Its pH is typically higher than that of coffee, making it a preferable option for individuals seeking a less harsh caffeine source for their digestive system. The final pH is not fixed and is influenced by factors such as brewing method, water temperature, and the specific variety of mate. Its complex chemical makeup, rich in antioxidants and other beneficial compounds, makes it more than just a simple tea, offering a balanced and sustainable energy boost without the jitters often associated with coffee. For those seeking a delicious, energizing, and stomach-friendly alternative to their daily brew, yerba mate presents a compelling case. As with any beverage, preparation and personal tolerance are key to enjoying its full range of benefits.
