FAQ (sparkling teas)


Why don't I feel the jitters and crash with Zest?

Zest Tea is packed with amino acids, including L-Theanine, which studies show helps moderate caffeine's effects. Read more here

How much caffeine is in Zest?

135 - 160mg of caffeine, give or take. The natural caffeine level of teas varies, so the actual content can be a few milligrams over or under the stated range.

Is it really the most caffeinated tea on the market? 

As far as we know, yes. And by quite a margin. Zest has about 3x the caffeine of normal tea, or about as much caffeine as a regular cup of joe.

Can the level of caffeine be harmful?

In high doses caffeine can be harmful, but our teas contain levels that are generally regarded as safe. Zest's caffeine levels are comparable to a cup of coffee.

Are your teas gluten free? Sugar free?

All of Zest Tea's blends are gluten free and while there is naturally a small amount of sugar in some of the the blend ingredients like the fruit pieces, the final brewed product is sugar free.

How many calories/carbs are in Zest tea?

Our hot teas have an insignificant amount of calories and carbs (1-2 calories and carbs per serving). Our Sparkling Teas have 50-60 calories per can, and 13-15g carbohydrates per can (5% of Daily Value).

How do you increase the caffeine levels?

We have developed an innovative proprietary blending method that enhances the caffeine levels using a natural tea extract. The process and ingredients used are natural.

Where do your base teas come from?

Most of our base teas come from the Nilgiri region of India and the Anhui province of China.



Where is Zest Tea located?

Baltimore, Maryland

Is Zest hiring?

See our Careers page for up to date info. 

Does Zest Tea work with bloggers or influencers?

We love working with bloggers and influencers! If you are interested in collaborating, send an email to team@zesttea.com.




Do you ship Zest Tea internationally?

Yes we do, but not for our Sparkling Teas at this time. Shipping charges vary by country, package weight and carrier. For accurate estimates shipping charges (and carrier options), please add the items you’re looking to buy and go to the check-out page.

Is Zest Tea available in stores?

You can see a list of stores that currently carry Zest here. Not by you yet? Never fear. We are always looking to expand. If you know of a store (or own one) that would be interested in Zest, we’re all ears!

Can I purchase Zest wholesale for my office or shop or become a distributor?

If you are interested in wholesale and/or distribution of Zest please fill out our wholesale request page