Does Roasting Green Tea (Hojicha) Make It Less Healthy?

March 19, 2019

Does Roasting Green Tea (Hojicha) Make It Less Healthy?

There are many delicious varieties of green tea available, each with its own flavor profile and health benefits. One that has been garnering attention lately is hojicha, or roasted green tea. Made from the pan-roasted leaves and stems of tea, hojicha was first developed in Kyoto, Japan in the 1920s and has become popular around the world. 

Many health claims have been made around this roasted green tea, but people have begun wondering if hojicha is as beneficial for our health as regular green tea. There’s the possibility that the roasting process can strip tea of its natural health-giving properties while enhancing others.

While it’s important to keep in mind that all tea will have health benefits, the chemical composition of each particular variety will determine the extent and strength of the wellness boost it can provide. As tea drinking becomes more prevalent, studies are being done to fully understand the health-giving properties of this plant. Although there hasn’t been much research done on hojicha yet, there are a few studies that can give us a good idea on what makes it different from steam and fan-dried green tea. Here we go over some of the key differences between regular green tea varieties and roasted hojicha to see what has been discovered. 

Does Roasted Green Tea Have Less Caffeine Than Regular Tea?

One of the health claims surrounding hojicha is that due to the roasting process, hojicha contains lower levels of caffeine than other types of green teas. Although caffeine in itself isn’t necessarily detrimental to health and has been shown to have its own potential benefits in moderate amounts, the lower caffeine levels in roasted green tea would appeal to some people who may want to enjoy the health-giving properties of green tea but have restrictions on the amount of caffeine they can consume, such as children and the elderly.

Hojicha does indeed have lower levels of caffeine than other green teas, although it isn’t for the reasons you might think. Studies done in Japan on the levels of caffeine across different tea varieties do show lower levels of caffeine in roasted tea versus some other teas, but not all.

Night Time Hojicha

Gyokuro, a premium shade grown green tea variety, had an average caffeine content of 3.25%, and sencha, made from the first flush of tea plants, had about 2.57% caffeine. Bancha, the second flush of tea and the variety that hojicha is made from, had 1.55% caffeine on average.

What about hojicha? The samples in this study averaged at 1.76% caffeine, higher than its often parent tea, bancha.

How can this be? Doesn’t roasting break down caffeine? Well, not really. Coffee has much more caffeine than any green tea variety and yet its beans are always roasted before use. It’s more likely that the low caffeine content in roasted green tea is due to it being made from tea leaves and stems that are already lower in caffeine to begin with and not the roasting process. 

Hojicha roasted green tea

How Many Antioxidants Are in Hojicha?

Green tea is well known for having very high levels of antioxidants, especially catechins. These compounds have been studied in depth and have been shown to be able to protect against damage to cells from cancer-causing free radicals along with fighting heart disease, liver disease, obesity and diabetes.

Yet do these same protective effects extend to roasted green tea as well? The research doesn’t seem to think so. In fact, a recent study on the antioxidant content of tea based on its processing and brewing method showed that high-temperature roasting significantly reduces the final antioxidant concentration in those brews. They concluded that the roasting process actually destroys many of the catechins present in the fresh leaf.

So if you’re looking for an antioxidant boost, it’s best to stick to regular green teas. 

Is There a Relationship Between Hojicha and Stroke Risk?

This may come as a surprise to some, but there is a well-documented relationship between green tea consumption and stroke risk. It’s an inverse relationship, of course, meaning that drinking green tea significantly reduces the risk of a tea drinker having a stroke. Green tea also reduces the risk of death even if a person does have a stroke and the likelihood that they’ll have a second stroke. Is this incredible protective quality also present in roasted green teas? Let’s take a look at what scientists have to say about that.

According to a study published in the International Journal of Epidemiology, the answer is no. This study couldn’t find any relationship at all, good or bad, between drinking roasted tea and stroke. While it’s definitely comforting to know that hojicha won't harm you, it’s also important to keep in mind that you won’t be getting the same protective effect that you would from unroasted green tea. 

So Should I Stop Drinking Hojicha?

While roasted green tea may not share in all the same health-giving properties that other types of tea possess, let's remember tea research is still young and as more studies come out, who knows what incredible things will be discovered about hojicha. Regardless of its health benefits though, hojicha should still be valued for its unique taste and its rich history alongside the other varieties of Camellia sinensis. 

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