Matcha is a fan favorite whether consumed hot, room temp, or cold. But its flavor and nutrition can be significantly impacted by different water temperatures. When you drink matcha, you consume the whole tea leaf, which provides a higher concentration of healthy compounds such as antioxidants, especially EGCG, L-theanine, chlorophyll, and various vitamins and minerals.
These nutrients are what make matcha so special, but they can also be easily destroyed by temperature.
Keep reading to discover what water temperature does to matcha’s flavor and nutritional compounds- and the best way to prepare matcha for your personal taste and goals.
Nutritional components of matcha tea
Matcha, a powdered form of green tea, is grown and processed in a special way that preserves and enhances many of its nutrients. With matcha, you consume the entire tea leaf in a powdered form, which provides a more concentrated dose of the beneficial compounds (compared to traditional green tea, where the tea leaves are steeped and then discarded).
Matcha is rich in nutrients like:
Catechins, a type of antioxidant that has been studied for its effects on inflammation markers and for helping protect cells from oxidative damage.
L-theanine, an amino acid that promotes a feeling of relaxation, may reduce feelings of stress and anxiety.
Caffeine, which provides a steady, calm energy, when paired with L-theanine.
Chlorophyll, a compound that gives matcha its vibrant green color. Chlorophyll has antioxidant properties.
However, the solubility of these nutrients can depend on the water temperature you’re using.
How water temperature affects nutrients:
The water temperature you use to make your matcha can either enhance or degrade some of the healthy compounds in matcha, including catechins and L-theanine. When it comes to absorbing these beneficial nutrients, hotter isn’t always better!
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Catechins: Catechins are a group of polyphenols with antioxidant properties, with EGCG being the most potent in matcha. Higher temperatures can help extract EGCG from the tea powder; one study found that catechin levels peaked at a temperature around 176°F but started to decline at about 185°F. This suggests that while hot water can help release EGCG, there’s a tipping point where too much heat can lead to catechin oxidation.
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L-theanine: L-theanine is the amino acid in matcha that promotes a calm focus that counteracts any negative side effects of caffeine. It’s quite stable in warm water, but can degrade in temperatures over 185°F. Water temperatures between 140°F and 160°F seemed to preserve its structure the best, while another study found that 174°F was the ideal temperature for L-theanine extraction. L-theanine does appear to be quite steady in colder water temperatures as well.
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Chlorophyll: Chlorophyll is responsible for giving matcha its bright green color and also has antioxidant properties. Chlorophyll is easily destroyed by both heat and light, which affects both its nutritional quality and also dulls its color. This is one of the reasons why making matcha with boiling water is not recommended. Studies show that chlorophyll starts to significantly degrade above 165°F.
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Caffeine: Caffeine levels can significantly change based on water temperatures. Higher water temps (above 195°F) lead to more caffeine extraction. Colder water temperatures (below 140°F) will give you a milder, less stimulating cup of matcha.
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Vitamin C and other micronutrients: Matcha isn’t a concentrated source of Vitamin C, but it is present. Vitamin C is extremely heat sensitive and begins to degrade at temperatures above 140°F, and is almost completely lost at boiling. Some B vitamins can be similar. If you’re seeking maximum nutrient retention, lower temperatures are your best bet.
To preserve the most nutrients and beneficial compounds from matcha, aim for water that’s between 140-175°F, which allows for solid catechin extraction while still protecting the more delicate compounds like chlorophyll and vitamin C.
How water temperature affects flavor:
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Cold (40-60°F): This temperature range can yield a very smooth, almost sweet flavor with minimal bitterness. While not traditional, drinking matcha cold or iced is a great way to preserve the nutrients and is extra refreshing. Cold matcha may be ideal for anyone new to matcha as it can have a smoother taste.
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Cooler (130-150° F): At lower water temperatures, you get more of matcha’s sweet, umami notes. Bitterness tends to be pretty minimal, and the texture is pretty silky.
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Mid-range (158-176° F): This is the ideal range where both amino acids and catechins are well-extracted, which creates a balance between umami, astringency, and just slight bitterness. Matcha at this temperature is still smooth, but with a bolder flavor.
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Hot (185-194° F): At this temperature, the bitterness really starts to build. Catechins and tannins become more dominant, which can lead to matcha tasting more astringent. At boiling, matcha can taste quite bitter and even scorched. You’ll also notice the color shift from a vibrant green to a dull yellow. High heat affects both the nutrient content and flavor and is not recommended.
What kind of water to use
Matcha is almost entirely water, so the water itself changes how it tastes. Three things matter most: temperature (covered above), pH, and mineral content, often listed as TDS (total dissolved solids).
- Soft water: Fresh spring water or filtered tap water with a light mineral content brings out matcha's sweetness and aroma. If your tap water is hard, a filter that brings minerals down to about 80 ppm or less makes a noticeable difference.
- Hard water: A high mineral load dulls matcha's aroma and flattens its flavor.
- Distilled water: With no minerals at all, matcha can taste flat. A little mineral content gives the tea body.
- pH: Aim for water close to neutral, around pH 7. Noticeably acidic water can make Japanese teas taste sour, while alkaline water tends to push bitterness forward.
- Chlorinated tap water: A carbon filter helps, or bring the water to a boil and let it cool to your target temperature, which reduces the chlorine taste.
If filtering doesn't help, try a few bottled spring waters with lower mineral content and taste them side by side with the same matcha. Most people are surprised how much difference the water makes. And if you like your matcha cold but want the fuller flavor of warm water, whisk it at 160-175°F, then chill it in a heat-safe glass or pour it over ice. Our matcha latte guide walks through the whisking step.
Bottom Line:
The temperature you use to make your matcha can have a big impact on both flavor and nutrition. While hotter water can help to extract more catechins and caffeine, it can also degrade L-theanine, chlorophyll, and some vitamins. For the best balance of health benefits and flavor, we recommend using water between 140°F and 175°F. Cold water can also be a great option, as it helps preserve nutrients and offers a smoother, sweeter taste, making it ideal for someone new to drinking matcha.
Disclaimer*
These statements in this blog post have not been evaluated by the Food and Drug Administration. The information provided here is for educational purposes only and should not be considered as medical advice. It's essential to consult with a qualified healthcare professional before making any dietary or lifestyle changes.
Resources:
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