A refreshing blackberry lime energy drink with 120 mg of caffeine and 100 mg of L-Theanine for balanced energy and calm focus, without the crash or jitters.
Natural caffeine delivers smooth steady, energy helping you stay alert and productive, without the spikes and crashes of traditional energy drinks
Flavor That Feels as Good as It Tastes
Bright fruit flavors and natural ingredients come together for a smooth refreshing, experience no syrupy sweetness, no chemical finish.
Calm Focus & Mental Clarity
L-theanine and Caffeine combined promote focus and cognitive performance while keeping you feeling calm and in control even during, long demanding days.
Easy on Your Gut
Formulated without harsh stimulants or artificial additives Zest is gentle on digestion, so you get energy without jitters, nausea, or stomach discomfort.
Sustained, Crash-Free Energy
Natural caffeine delivers smooth steady, energy helping you stay alert and productive, without the spikes and crashes of traditional energy drinks
Flavor That Feels as Good as It Tastes
Bright fruit flavors and natural ingredients come together for a smooth refreshing, experience no syrupy sweetness, no chemical finish.
Calm Focus & Mental Clarity
L-theanine and Caffeine combined promote focus and cognitive performance while keeping you feeling calm and in control even during, long demanding days.
Easy on Your Gut
Formulated without harsh stimulants or artificial additives Zest is gentle on digestion, so you get energy without jitters, nausea, or stomach discomfort.
*Based on customer-reported experiences and clinical studies on caffeine + L-Theanine. Individual results may vary. Zest is not intended to diagnose, treat, cure, or prevent any disease.
GMO free
Plant Based
Zero Calories
Zero Sugar
Non-GMO Ingredients
How We Stack Up
Caffeine levels per cup:
Tea
25-50mg
Coffee
~120mg
Energy Drinks
~150mg
Zest Blackberry Lime (Zero Cal)
120mg
Zest Sparkling Energy
150mg
Feel the synergy
Coffee-level energy. Better performance. Fraction of the cost. Natural ingredients. This is the smarter choice.
Coffee/Energy drinks
97%
Would recommend Zest to their friends.
94%
Say Zest boosts their energy
81%
Say Zest helps them stay focused without the jitters or crash.
98%
Say they enjoy the flavor
SMOOTH ENERGY WITHOUT THE CRASH
Each can is powered by natural tea caffeine paired with L-Theanine, clinically shown to improve focus and reduce the jitters and crashes common with coffee and energy drinks. Clean energy you can feel, without the downsides.
Energy That Tastes as Good as It Feels
Clean energy shouldn’t taste like compromise. Zest energy drinks are crafted with bold, crave-worthy flavors that make every sip enjoyable.
No weird aftertaste
No Artificial Sweeteners (Sucralose Free)
Seriously good flavor
Powered by real ingredients
What's Inside Your Energy Tea?
Feel the difference a clean energy drink with science-backed ingredients can make. Scroll through the ingredients below to learn more about the benefits behind each one.
Natural Caffeine
135-150mg of Sustained Energy
Natural caffeine from premium black and green tea leaves delivers coffee-equivalent energy with smoother delivery and longer duration. Unlike synthetic caffeine powder, tea-based caffeine releases gradually for sustained alertness without harsh spikes or crashes.
Benefits:
Sustained Energy
Enhanced Focus
8-12 Hour Duration
Did you know?
Tea-based caffeine is metabolized more gradually than coffee's concentrated form, providing smoother energy delivery. When combined with L-Theanine, it produces optimal cognitive performance without negative side effects.
L-Theanine
For calm focus
L-Theanine is an amino acid naturally found in tea that promotes relaxed alertness without sedation. Clinical research proves it counteracts caffeine's jittery effects while enhancing cognitive performance, attention, and accuracy.
Benefits:
Eliminates Jitters
Enhanced Focus
Reduces Anxiety
Did you know?
Multiple peer-reviewed studies show that caffeine + L-Theanine together improves cognitive performance better than caffeine alone.
Natural Flavors & Ingredients
Crave-worthy taste that never gets old
Every sip delivers bold, authentic flavor you'll actually look forward to. Each variety is crafted with natural flavors for vibrant, genuine taste that makes clean energy something you genuinely crave.
Benefits:
Genuine Fruit Flavor
Naturally Delicious
Bold Taste
Did you know?
Great flavor isn't just about taste - it's about creating an energy drink experience you'll actually look forward to, making it easier to choose clean energy every day.
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See Why They're Obsessed
The perfect complement
“I really enjoy the canned "Passionfruit Berry" Zest tea, which my wife and I dub "fizzy Zest". I enjoy a hot cup of tea most mornings, but like to have a soft-drink-like beverage with my lunch. Fizzy Zest is the perfect complement to a great sandwich, tasty slice of pizza, or spicy Mexican lunch dish. Ole'!”
Deano S..
Verified Customer
Fantastic product(s)
“Drink it everyday and feel so much better than if I had coffee. Great variety of flavors, fantastic customer service".
Julie.
Verified Customer
The flavor is amazing
“The sparkling tea, especially this flavor, is WAY better than I expected and exceptional! The flavor is amazing and the can is excellent to travel with. I am now obsessed and just bought more! : )”
Each serving contains 135–150 mg of natural caffeine, depending on the flavor, along with naturally occurring L-Theanine for smoother, more balanced energy. That’s comparable to a strong cup of coffee or a standard energy drink.
Are Zest Energy Drinks carbonated?
Yes. They’re lightly carbonated for a crisp, refreshing finish that pairs perfectly with our bold flavors.
Why are Zest Energy Drinks better than traditional energy drinks?
Zest delivers high energy without synthetic additives, artificial sweeteners, or heavy sugar. You get clean, smooth focus instead of the typical crash or jittery buzz .
How many Zest Energy drinks can I have per day?
Most people enjoy one per day, but depending on your caffeine tolerance, two cans can fit perfectly in your routine
Are Zest Energy Drinks vegan, gluten-free, and non-GMO?
Yes. Our drinks are made with clean-label ingredients and are vegan-friendly, gluten-free, and non-GMO.
What's the best time to drink Zest Energy for peak focus?
Enjoy in the morning, early afternoon, or pre-workout - anytime you need clean, sustained focus and performance.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
My one true love energy drink. I pack them when I go!
That's awesome! We hope it continues to give you the energy you need. Cheers!
G
Gina F.
Love it
I love that it’s not too sweet . It gives me the energy I need for the whole day without crushing
E
Emily F.
To me, this tastes terrible.
To me, this tastes terrible. It is undrinkable as it is because I don't like unsweetened carbonated drinks, but people that like carbonated water will probably like it fine (like Perrier, Bubly, Le Croix, etc. ) But here's why it still gets 4 stars: I DO appreciate that it has no calories, and I also think the energy is great. I pour it over ice into a big tumbler and add a little pomegranate juice and water flavor powder (like Skittles) for sweetness. The energy is so great I actually only use half a can (one can is 120mg of caffeine. ) and I'm someone who typically drinks the big Monster cans that are 150mg of caffeine (and I still have coffee, lol. ) This stuff is great if you need a good kick in the a** to get through the day.