The History of Mulberry Leaf Tea: From Ancient China to Your Cup

Hello there! I’m Ruth Nakamura, your friendly neighborhood backyard orchardist, and I’ve spent the last 15 years growing mulberries right here in the beautiful Pacific Northwest. I’ve experimented with a dozen different cultivars, including Black Beauty, Chinook, Illini Star, and Ozark Premier, learning through trial and error what works best in our unique climate. One sunny afternoon, my sister called me, curious about whether the leaves on my mulberry trees were edible. She’d read about mulberry leaf tea online and wanted to know if I’d ever tried it. At the time, I hadn’t, but her question sparked a journey that has changed how I view my mulberry trees. I dove headfirst into research, watching videos, reading articles, and eventually starting my own experiments. It turned out that the leaves on my trees offered so much more than mere shade and beauty. If you’re growing mulberries and haven’t considered their foliage, let me share what I’ve discovered—it’s truly remarkable!

The Mulberry Leaf Tea History That Begins in a Silk Farm

The origins of mulberry leaf tea are deeply intertwined with the history of silk. Mulberry trees, particularly the Morus alba (white mulberry), formed the backbone of ancient silk production in China. These trees were cultivated in vast plantations, and farmers harvested their leaves in staggering quantities to feed silkworms. What started as agriculture specialization evolved into immense wealth and economic power for centuries.

As farmers worked among these trees, they began to notice the therapeutic potential of the leaves themselves. This realization likely began during the Han Dynasty (206 BC through 220 AD), when individuals started steeping leaves into drinks for various ailments, perhaps out of sheer necessity. Over time, the medicinal use of mulberry leaves emerged from the same agricultural roots that nurtured the silk trade. It’s fascinating to think that the very leaves that supported royalty were also used by common folk for healing.

I often reflect on this duality. The same leaf that adorned the tables of emperors was being brewed into teas for those seeking relief from ailments. It’s a beautiful reminder of how interconnected our lives can be.

Sang Ye: The Ancient Medical Texts That Changed Everything

The formal recognition of mulberry leaf as a medicinal plant is detailed in the Shennong Ben Cao Jing, or the Divine Farmer’s Materia Medica, one of the most influential texts in Traditional Chinese Medicine. Compiled around 200 AD, this work cataloged hundreds of therapeutic plants, and mulberry leaf—known as Sang Ye (桑葉)—was given its own entry.

In Traditional Chinese Medicine, Sang Ye is noted for its ability to disperse lung heat, alleviate inflammation in the liver, and help with coughs and upper-respiratory conditions. It’s intriguing to see how modern science has confirmed the presence of genuine anti-inflammatory compounds in mulberry leaves that align with the ancient understanding of their medicinal properties. Those early practitioners didn’t have sophisticated tools; their knowledge was built on observation and experience passed down through generations. It’s humbling to see how their insights have stood the test of time.

When I first learned about this connection, it stopped me in my tracks. The idea that thousands of years of empirical observation could be validated by contemporary science made me rethink everything I thought I knew about herbal medicine.

Japan Embraces the Practice: When Mulberry Leaf Became About Blood Sugar

This knowledge didn’t remain confined to China. By the 7th century AD, Buddhist scholars traveling between China and Japan brought with them herbal wisdom, including the use of mulberry leaves. Japan incorporated these practices into kampo, a distinctive branch of herbal medicine that has formal recognition and even partial insurance coverage in modern Japan’s healthcare system. The way Japan has embraced this knowledge is truly admirable.

What particularly fascinates me is how Japanese healers focused on managing blood sugar long before we had the modern understanding of diabetes. They recommended mulberry leaf remedies to patients showing symptoms we would now recognize as diabetic. Only recently have scientists identified the compound 1-deoxynojirimycin (DNJ) in mulberry leaves, which slows sugar absorption in the intestines. It’s almost surreal to think that centuries ago, practitioners were guiding patients toward something that modern science would eventually validate.

This realization moves me deeply. Imagine being a patient in medieval Japan, drinking this tea on the advice of a healer, completely unaware that you were partaking in a practice that would be confirmed by science over a thousand years later. It gives you a profound sense of perspective.

Picking and Preserving Your Own Leaves Before Flavor Fades

When it comes to preparing mulberry leaves for tea, timing and storage are crucial. I learned this the hard way after leaving harvested leaves out in direct sunlight for a couple of hours; I watched in dismay as the vibrant green color faded and the flavor diminished.

What works

• Buying loose leaves instead of bagged tea gives you transparency—you can see and inspect what you’re brewing. No hidden debris or questionable quality!
• Smaller leaf pieces rehydrate faster, distributing flavor more evenly in your cup, which has helped me achieve consistency from one brewing to the next.
• Sampling high-quality commercial loose-leaf mulberry tea provided a benchmark for my own harvest, revealing that I was drying my leaves too hot.

What doesn’t

• A proper infuser or fine-mesh strainer is essential—putting loose leaf directly into a cup creates sediment, and it can be quite unpleasant to drink down to the bottom.
• While the cost of loose leaf tea is higher than tea bags, it can spoil quickly if your storage container isn’t airtight. I’ve seen oxidation and odor absorption happen within days.

At one point, I almost gave up on making my own tea. My first batch tasted so flat compared to the store-bought varieties. Then I realized I was comparing fresh-dried leaves to oxidized commercial stock that had been sitting for six months! TooGet Natural Mulberry Leaf Loose Tea became my control sample, and it completely transformed my expectations.

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