Z-STACK Recensioni 

I’ve been using Z stack for going on six years ever since Covid started and it has been my go to immune booster. I use the Z night now to get a restful sleep and they Zelin go laps is my trust is Source for health protection.

A+ product and excellent customer service. I highly recommend Zelenko Labs.

Zstack is the best supplement my husband and I have had so far. We’ve never been sick since we started to use it. It has every ingredient in it that our body needs. Unfortunately we’re paying a postage as high as for one bottle of Zstack. This is the only reason we have to stop buying it. For this reason being said we’re not happy that nothing can be done in that direction. Although we would recommend Zstack to anyone.

I have had a subscription for Z-Stack for over 4 years. After covid I was looking for a good vitamin. I knew I was low in Vitamin D, and I wanted a vitamin that would help with my low Vitamin D levels. I started listening to Dr. Zelenko and decided to try the Z-Stack. After taking Z-Stack for several months, I had bloodwork done and my Vitamin D levels were better than they ever have been and continue to be at a healthy level every year and that is why I continue my subscription each year. The vitamins work. I am confident these vitamins help me stay healthy. You will not be disappointed with these vitamins.

Our family has been using Zelenko products since their inception. My grands especially like the strawberry flavored gummies now ZFlu. Thank you for keeping Dr. Zelenko’s legacy alive and well!

I have been using your products for years. Very happy with the product and services received.

Awesome service and best products!!

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.

I have been using Zflu since Dr.Zelensky developed it. Zflu has all the vitamins/minerals needed to prevent and or treat the flu, without having to spend all the money on each of the vitamins separately. I even have my grandson taking Kids Zflu and have recommended it to all my friends. Zflu keeps us symptom-free all year long!!!

Dr Zalenko's products are top of the line; my husband and I have been on them since the onset. We have also shared them with family and friends for them to try. We feel our immune system has gotten stronger since we first started with Z-stack and now on Z-detox. I will continue to promote them on facebook and instagram as well because I trust this for everyone.

At first I couldn’t understand what you were trying to tell me, but then did. All messages were in a calm and friendly tone. Thank you very much for your attention and support.

I had not gotten my order after 2 weeks time. I was sent a replacement right away. Thank you! Also, this product-Z-Stack has been fantastic in maintaining immune system. I have been taking it for years and have not gotten sick for a long time. No yearly cold or flu like many acquaintances. Highly recommended.

I am very fortunate to have found Dr Zelenko’s vitamins. At 80 years old, I have been able to stay well and have not suffered even one Covid event. I attribute my good health to Dr. Zelenko’s vitamins.

I had a fast and great response to my issue that was quickly resolved.
I am so thankful!
Pam

I get the kids gummies for my children and end up stealing some for myself

Been using Z-Stack and Z-Night and really like both. Z-Stack feels like solid daily support, and Z-Night helps me relax and sleep better without feeling groggy. Clean formulas, all natural, brand I trust. Would recommend.

Zstacklife has been full of contradictions, gaslighting and evasive customer service. They sent my shipment confirmation at 1:16 PM, only a few hours before closing. I didn’t see it until after they were closed, and when I called the next morning, they said it had already shipped and refused to cancel.
When I brought up the late confirmation, the rep denied the timing despite the clear timestamp. When I emailed support with the screenshot, they dodged the issue entirely and blamed a credit card problem that wasn’t even relevant. My online account also marked the order as “Ready for pickup,” which is odd for an online-only business.
The most concerning part? Instead of addressing my questions or correcting the issue, the company cancelled my subscriptions. A transaction like this is akin to a toddler throwing a tantrum, but a health company to shut down the conversation rather than resolve it is inexcusable.
This is extremely toxic, dismissive, and unprofessional.

I've been taking Z-Stack for close to 4 years and have not been sick one day since I started taking it. I am 72 years old, and full time daycare for a granddaughter in school so the germs do come home, but she also has not been sick since she started taking the Kid's Z-Spike gummies. I DO NOT understand all the bad reviews unless they are bots or angry people in general. I have needed to contact customer service MANY times and always (during business hours) get a live person with NO foreign accent, and they are always more than helpful! For those who are having problems with customer service, perhaps you're calling a wrong number. Their customer service # is 800-935-3656 and I NEVER have an issue with getting a wonderful representative. The product itself is a godsend. Miraculous to NEVER get sick at 72 years old in the 4 years I've been taking it. IGNORE BAD REVIEWS! Not true!

Couldn’t tell if this product helped or not with immunity issues. What I can say is that if you get a subscription, it’s not that easy to stop it. It is common these days I guess to get no customer service and finding a place to submit a request or complaint is a lot of fun. I have combined bottles to make room in my cabinet but still have seven bottles… when you think you have cancelled … guess again.