Mulberry Tea for Cholesterol: What Research Says About Heart Health

Hello there! I’m Ruth Nakamura, and I’ve spent the last 15 years growing mulberries in my backyard right here in the beautiful Pacific Northwest. My journey with mulberries began as a simple endeavor to have fresh fruit in my garden, but it quickly blossomed into a passion for experimenting with different cultivars, like Black Beauty, Chinook, and Illini Star. Each variety has its own unique flavor profile, and I still get excited every summer when the trees are bursting with juicy fruit. In my explorations, I’ve come to realize how versatile this wonderful fruit is—especially when it comes to preservation. I want to share some of my experiences with you, particularly focusing on mulberry leaves and the fascinating world of brewing mulberry leaf tea.

As I delved deeper into preservation methods, I found myself gravitating towards fermentation—wines, vinegars, and lacto-fermented preserves that seem to last forever and develop flavors that surprise me each time. But then something clicked for me while I was hanging dried mulberry leaves above my fruit-processing counter. I noticed that these same leaves were being highlighted in peer-reviewed studies regarding heart health and cholesterol levels. It dawned on me that here I was, growing and harvesting these leaves all along, and I hadn’t even considered their potential beyond composting or tossing them to the chickens. So, let’s explore what the research actually says about mulberry leaf tea and its connection to our cardiovascular system, shall we?

First and foremost, I want to be clear: I’m not a medical expert. I’ve learned everything I know about growing and preserving mulberries through years of trial and error, reading, and talking with fellow gardeners and nursery professionals. My dad takes his cholesterol medication, and that’s a conversation best left to him and his doctors—far away from my teacup. What truly surprised me while reading the research wasn’t just the existence of studies on mulberry leaves, but the solid methodology behind them. I want to share what I’ve found with you, so you can make informed decisions about whether to add mulberry leaf tea to your routine.

What the Research Actually Shows About Mulberry Tea and Cholesterol

Now, let’s dive into the research. It’s essential to approach this with a healthy dose of skepticism. Just because something is written in a study doesn’t automatically mean it’s a cure-all. However, the body of research surrounding mulberry leaves is impressively rigorous. One study that made me do a double take was a double-blind, placebo-controlled clinical trial involving individuals with existing coronary heart disease. They examined whether mulberry leaf extract could actually reverse atherosclerotic lesions, which means could it shrink the plaque buildup in arteries? The researchers identified a naturally occurring compound in mulberry leaves called DNJ (1-deoxynojirimycin) as the active player here. I had to read that part a few times—it was genuinely focused on heart patients and conducted with a solid experimental design.

Another study followed 23 adults with slightly elevated blood lipids who consumed three 280 mg mulberry leaf tablets three times daily over 12 weeks. The results were noteworthy: LDL (the “bad” cholesterol) decreased by 5.6%, while HDL (the “good” cholesterol) rose by 19.7%. That rise in HDL really grabbed my attention, as raising those levels is notoriously tricky. A 5.6% drop in LDL may seem small, but paired with a nearly 20% increase in HDL, it indicates a meaningful shift in cholesterol balance from just a dietary change.

A systematic review of cardiometabolic outcomes further corroborated these findings. When participants consumed 6 grams of mulberry leaf tea daily for 12 weeks, total cholesterol decreased by 9.8%, and triglycerides—a type of fat that contributes to heart risk—declined by 14.9%. A drop in triglycerides that significant from simply brewing and drinking tea was impressive to me.

So, what’s going on in our bodies? The polyphenols in mulberry leaves—similar to those found in blueberries and green tea—seem to inhibit cholesterol absorption during digestion while simultaneously aiding lipid metabolism. Essentially, they help your body process fats more efficiently, preventing them from accumulating in arterial walls.

What Remains Unclear (And Why Transparency Requires Saying So)

While the findings are encouraging, it’s important to acknowledge the limitations of the research:

• Study sizes tend to be small. Twenty-three participants provide intriguing insights, but we need larger studies involving hundreds of individuals to draw broad conclusions.
• The dosages and forms used across different studies vary significantly—some use extracted concentrates, while others brew the whole dried leaves. The benefits seen in concentrated forms may not translate directly when brewing loose-leaf tea.
• We don’t yet know how long mulberry leaf’s effects last beyond the 12-week mark.
• Mulberry leaves might interact with diabetes medications, as they can also lower blood glucose levels. If you’re on prescribed medications, it’s essential to consult your doctor before adding this to your routine.
• No research currently suggests that mulberry tea can serve as a standalone treatment or substitute for prescribed medications. It might be a helpful addition, but that’s something to discuss with your healthcare provider.

I believe in sharing both the promising aspects of mulberry leaves and the limitations of what we understand. The wellness industry often oversells unproven remedies, and while there’s legitimate research supporting the cardiovascular benefits of mulberry leaves, it’s crucial to remember that tea isn’t a miracle cure, nor does it replace necessary medications.

The Food Dehydrator That Changed How I Preserve Mulberry Leaves

Now, as a backyard orchardist, I’ve learned that preserving mulberries and their leaves is an art form, especially when aiming to enjoy them long after the harvest. Drying leaves for tea becomes a high-value use of plant material, but managing moisture in our Pacific Northwest climate can be a challenge. I’ve faced mold, nutrient loss, and frustratingly long drying times with air-drying methods. That’s where my food dehydrator comes in—it takes the guesswork out and allows me to preserve those leaves at their peak, on my terms.

Where it delivers

• Leaves dry completely in just 4–6 hours on a low setting, cutting down the weeks I used to wait for air-drying. This means the chlorophyll and polyphenols stay intact, locked in right when they’re most concentrated.
• The controlled temperature prevents the scorching and discoloration that plagued my earlier attempts at oven-drying. The finished product remains a vibrant green and has a clean taste, rather than a roasted one.
• With multiple trays, I can dry a massive harvest of leaves all at once when summer brings that explosive flush of growth—no more worrying about drying space!

Where it falls short

• This dehydrator takes up permanent counter space, so it’s not the most compact tool. You’ll want it accessible for use throughout the growing season.
• Your first attempts may lead to either over-dried, brittle leaves or slightly moist ones as you learn the ideal timing for different mulberry varieties and the thickness of the leaves. There’s definitely a learning curve, and it may cost you a few harvests along the way.

Honestly, I almost threw in the towel after my first batch turned out too brittle to crumble properly. But after adjusting the temperature down by 10 degrees and checking the leaves at the 3-hour mark, I finally nailed it! Find it on Amazon here.

This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.

Sources and Citations

The health claims discussed on this page are supported by peer-reviewed research. Here are the key studies referenced:

• Chen et al. (2015) — “Effects of mulberry leaf tea on postprandial blood glucose in patients with type 2 diabetes.” Saudi Journal of Biological Sciences, Vol 22, Issue 1, pp 32-36. PMC4281624 →
• Shibasaki et al. (2016) — “Mulberry leaf extract suppresses postprandial blood glucose in healthy adults: a randomized, placebo-controlled trial.” Journal of Functional Foods. PMC5321430 →
• Matsumoto et al. (2017) — “Mulberry leaf extract decreases postprandial glucose and insulin responses.” PLOS ONE. PLOS ONE →
• Kamei et al. (2013) — “Mulberry leaf extract improves serum lipid profiles in humans.” Journal of Clinical Biochemistry and Nutrition. PDF →
• Zhang et al. (2018) — “Mulberry leaf extract for weight management: a randomized controlled trial.” Journal of Medicinal Food. PubMed search →

Note: Study results are not guaranteed for individual users. Dosage, extraction method, and individual physiology all affect outcomes. Consult your healthcare provider before making changes to your treatment plan.