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.
95 approved reviews, newest moderated first
Cellik Z.
Posted
ordered a bottle, but there's no order confirmation and ship tracking. nothing happened except a ad email regarding next purchase. it's been a week and i still get nothing. i would avoid this site forever and don't order anything from there!
I S.
Posted
I had been purchasing various supplements from Zstack. They were my go to and I trusted this company. My most recent purchase (a few months ago) included the kid's gummy supplements along with my usual order. The regular order was fulfilled with the exception of the kid's gummies. Initially, I did receive a mass email that explained issues getting the gummies out but they had a fulfillment date. With that, I decided to order more gummies to stay ahead of future issues. That fulfillment date passed a while ago and I've contacted them twice with no response. If they ever fulfill my orders, I will cancel my account with them. For now, my trust in them is gone and I will never buy another product from them again. Receiving no response to my concerns is not acceptable.
Diane H.
Posted
I have been using zstack since it came out. Me, who is prone to bronchitis, colds and always sick have not been sick since I began. I recently ran out and I didn't reorder because I found out I am loosing my job in July to outsourcing to another country 😪 anyway I wasn't taking it for about 2 ,3 weeks and I got the worse upper respiratory infection and bronchitis that I have ever had. It is 11 days and I am only maybe 70 percent. Well I am now ordering my supply. I'll save money elsewhere, these are too precious!! God bless Dr Z and his team. May he RIP
Susan
Posted
I was very disappointed with the Z stack vitamins. I bought it because I was specifically looking for an all-in-one combination, which this pill provided. However, everytime I take it I seem to have some sort of allergic reaction like runny eyes watery nose congestion. So, I'm not sure if there are additional ingredients in it that are causing me to have the allergy. I seem to do better when I just take the individual vitamins separately. Unfortunately, the z-stack did not work for me as I had hoped.
Shannon H.
Posted
It’s nice to have around
Niki H.
Posted
I am trying to cancel a reoccurring order but am unable to online. I have emailed at least 3 times with no response. 1 month later, i received a reply.
Jo
Posted
Can't really rate it, never received it. Made several inquiries since 9 Nov 2021 when I ordered a bottle. Received responses, bogus tracking numbers, and a claim from them they sent it on 3 day expedited delivery. NEVER RECEIVED IT! TERRIBLE COMPANY to do business with. Be warned!!
Rick M.
Posted
Ordered 2 bottles on 9/27/2021, still have not received them. have sent multiple messages to them and no reply. just a scam company. reporting them to several agency's. asked them to return my messages and was ignored.
