If you're considering Essiac tea, it makes sense to look into safety and possible side effects first. After all, putting anything new into your body deserves careful thought — especially something you might use daily for months or even years at a time.
Essiac tea has been used traditionally for over 100 years, beginning with Canadian nurse Rene Caisse in the 1920s. Throughout that time, users have generally reported it well-tolerated, though like any herbal preparation, individual responses can vary.
Below, we cover what you need to know before starting: commonly reported side effects, who should consult a healthcare provider first, possible interactions with medications, and safe brewing practices to minimize any unwanted reactions.
Is Essiac Tea Safe?
Essiiac is a traditional herbal tea with a long history of use dating back over a century. It's generally well tolerated by many adults when prepared and consumed as directed. As with any herbal product, individual experiences may vary and some herbs including those in Essiac may interact with medications or certain health conditions. It's not intended to diagnose, treat, cure, or prevent any disease.
Consult a qualified healthcare provider before use, especially if pregnant, nursing, taking medications, or managing a medical condition. You may prevent this pdf to your provider when you ask about how it may be compatible with what you use: Ask your provider about Essiac tea.
Research on Essiac tea
You may view research on the herbal blend on our Essiac tea and research page. This page is provided for educational and informational purposes only.
The good news is that Essiac Tea has only one reported side effect, and no serious side effects.
The tea is designed to be a slow, gentle experience - not a quick fix. Because of that, it tends to be very well tolerated. This isn't the type of product that typically causes herx reactions. See a study highlighting the general overall safety of eight herb Essiac tea (1).
The only side effect associated with eight herb Essiac is an increased frequency of needing to use the bathroom. You may think of it as diarrhea or a bit of cramping, but it is typically not out of control and will not stop you from continuing on with your usual activities. This actually becomes a desired effect for most because it's part of how the tea works. This is not going to be uncomfortable for the average person and is generally beneficial to the body as it will happen for those who could use a gentle purging. Normally this Essiac tea side effect lasts a few days at the longest. Your body will finally eliminate anything that should not be inside of you any longer. What great news!
If this Essiac tea side effect of increased need to use the bathroom or some diarrhea is bothersome to you, feel free to build up to the usual serving size rather than starting with the full serving right away. You may experience mild cramping as your body purges. Keep in mind that you should not start your official clock measuring how long you've been on Essiac until you have built up to the recommended amounts and are using them consistently, which are 3 oz. three times a day if you wish to improve your health and 3 oz. twice a day if your goal is maintenance of health.
If there are any other change that you notice while taking Essiac, it will be hard to know if it's Essiac causing it or something else. That being said, if you are concerned with how your body is responding and adjusting, feel free to start low and go slow. Everyone's body is different.
You may choose to start with as little as 1 oz. once a day and eventually build up to 3 oz. three times per day. Everyone is different, and that method might work better for you. Rest assured the average person does not experience Essiac tea side effects and normally starting at the full serving works fine for most people. Please consult with your healthcare provider if you are unsure.
Safe Brewing & Serving Sizes of Essiac tea
Of course safety starts with preparing the tea properly and consuming it in recommended quantities.
Likewise, you should prepare the tea at recommended strengths to have predictable effects. You may learn how to properly Brew Essiac tea here.
Our recommended use suggestions are based on Rene Caisse's suggestions. Please do not exceed maximum recommended servings sizes and frequencies.You may view Recommended Serving Sizes here.
Quality & Sourcing Matter
Genuine Essiac has been sourcing authentic powdered herbs for it's blend for the past 21 years. We choose from only the most reputable sellers in the United States. We third-party batch test to ensure consistency in the product. You can learn more about our Genuine Essiac Herb Quality here.
Customer Story
Individual results vary and are not typical. Not medical advice.
Disclaimer: This is a Genuine Essiac™ customer’s personal experience. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.
FAQ (Most-Asked Safety Questions)
Please consult with your healthcare provider when it comes to combining Genuine Essiac with chemo. You may bring this pdf with you: Show Genuine Essiac to your Healthcare Provider.
Yes typically, but please consult with their healthcare provider first. Learn more about providing Essiac tea to children.
Please consult with your healthcare provider before taking Essiac if you are pregnant, breastfeeding or trying to conceive. You can learn more about drinking Essiac tea while pregnant or breastfeeding here.
We recommend taking it for at least six months. It's a product you can consume indefinitely at the recommended serving sizes if you wish. Learn more about whether or not breaks are necessary when using Essiac.
It happens, even though you really want to try to not miss any. Simply resume taking it at your previous schedule. Doubling up won't be the best approach. In the future, try using cell phone alarms or reminder apps.
Disclaimer: This video shares the personal experience of a Genuine Essiac™ customer. Individual results vary and are not typical. Provided for informational purposes only. We provided complimentary product to this customer as a thank you for taking the time to share their honest experience.
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Last updated 06/04/2026
1 Safety and Genoprotective Effects of an 8-Herb Tea–ESSIAC Versus Mate Cocido, An Ilex paraguariensis Infusion. Veronica L. Martinez-Marignac, Jose Luis Favant, Leonel Mondragon, Gloria Oertlin.
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About the Author
Gina Paulhus
Founder & CEO, Genuine Essiac
Gina Paulhus is the Founder & CEO of Genuine Essiac. For more than 20 years, she has researched the authentic 8-herb Essiac formula and writes to help readers better understand its history, preparation, and quality standards.
Learn more about Gina →
Related Pages
Check out our Essiac Tea Taking Guide
Visit our Genuine Essiac Quick Start Product Guide - All You Need to Know