Great
95 reviews
Z-STACKHonesty, pricing, process and quality scores appear once 5 customers have rated them.
Zelenko Labs, built on the legacy of Dr. Vladimir Zelenko, creates products with purpose, precision, and integrity. Every formulation is made with high-quality ingredients and consistent standards, so you can feel confident in what you’re using. Thoughtful, reliable, and principled — Zelenko Labs products are made for people who care about quality.Our All American customer service team is here to help Monday through Friday, 9 AM to 5 PM EST — just give us a call at 1-800-ZELENKO (1-800-935-3656) or email our team at [email protected]
Z-STACK (zstacklife.com) has 95 customer reviews on Rated Honest, with an average rating of 4.1 out of 5.
Showing 3 reviews with 4 stars · Clear filters
Shawn S.
Posted
I use Z Stack & it really helps. Haven’t been sick in over 5 years. I did cancel Z Night because I saw no benefit to me after 2 years. Over all been quite satisfied. The support staff have been very helpful and supportive.
Response from Z-STACK· Mar 4, 2026
Thank you for your feedback!
Mary
Posted
I finally did receive the product after 23 days. Of course I tried calling and emailing with no response. Supposedly they were waiting for a shipment to come in. There was no action till I contacted PayPal about the purchase. Then my item was shipped the next day. I don’t know about the quality yet but I know it comes highly recommended. I will give it a chance. I want to add that I did receive the product and was sent an extra bottle. I’m going to give them another try. It certainly is easier taking it and only two pills rather than six or eight.
Dr J.
Posted
This is an excellent product. Just like in a Rolls Royce Car Dealer, if you can't afford to buy or don't even ask how much? Salesman will tell you, "you can't afford it so just leave..."..lol... You don't bad mouth Rolls Royce coz you can't afford it do you? you're already bias her so just sit down and don't say anything about it specially if you've never tried it and too cheap to spend $$ for your own health. Did you complain about Balance of Nature $69.95 a month with auto refill every 28 days as "preferred" to get the cheaper per bottle price? Just sit down dude. If its not for you, don't but it. It's very simple.
