Z-STACK Avis 

I buy this for my son who was getting sick a lot. Hasn't been sick since he started on these. GREAT PRODUCT and wonderful people to deal with.

Although the last date of my Uplifting experience with the Z-Stack team, and in this case Shannon, and their products was today, it's simply a repeat of many I've had with their team since Z-Stack's inception during COVID times approximately 6 years ago. Today, I made a personal error in ordering another regular 6 month (6 bottle) supply of Z-Stack after placing the same order yesterday but missing the fact that they'd already promptly notified me confirming the order yesterday. I contacted their support staff and within a few minutes received a response that today's order in question had already just been cancelled and charge card refunded. Over the approx. 6 years I've made about a dozen 6 bottle orders and although ordering is a breeze and shipping is seamless, I've found ways on a few occasions to make a simple technical ordering error but each time they've been met swiftly and with personal care. If everyone strived to serve others as the Z-STACK family does, who proudly carry the Legacy of Dr. "Zev" Zelenko, this world would be a far better place. Dr. Zev proved so much of what he stood for when he initially offered Z-Stack during dangerous times specifically when speaking out for better means of good health & immunity seriously risked losing his reputation and so much more. May he Rest in Peace. On the selfish side of things, I'm now a 69 year old male, average build & weight, moderate to low exercise, random but fair eating habits & non smoker or alcohol drinker. I've continuously been in contact with the public, shaken many hands & hugged or kissed lots of people & grandkids. Having said all of that, I chose not to touch any Pharmaceuticals or mask up over the past 6 years and am a chronic anti-vaxxer. I haven't had as much as a runny nose, cough, sniffle, sore throat, ear ache or anything else you can think of, over the past 6 years with Z-Stack. Seriously. I'll always be an Ambassador for the Z-Stack Family and Products.

Since taking Zstack I have stayed very healthy! Great product. I do add vitamin K3 to it. The response to inquiries is quick and respectful. I recommend.

your products and your people are wonderful. the website however is often hard for me to navigate without accidentally buying something twice or signing up for a subscription. nevertheless it will not stop me from buying your products because they are great and so are your employees thank you bhb

Customer service was very responsive and helpful

I receive Z-DTOX and Z-STACK from you for over 2 years. The products are great.They have helped to keep me healthy. When ever I have a question your staff is easy to reach and knowledgeable regarding your products. So thankful to have found your products. Marian

Their shipping is super slow. It takes a month to arrive. I'm not happy at all.

The Kids Z-Stack vitamins are literally the best kids’ vitamins out there, and we’ve tried plenty! If you want to keep your kids healthy, these vitamins really work! My three children have been taking them for about three years now. I get the subscription, and it’s worth every penny. Each of my children had a minor cold maybe twice within the entire last school year. I’m talking two to three days of sniffles, nothing major that even required a doctor’s visit. My oldest son had seasonal allergies for years, but not anymore. We virtually never get sick anymore. Praise God!!! Thank you, Dr. Zelenko! Also, the mixed berry flavor is awesome! My kids love it and say it tastes like Skittles!

Excellent customer service! Grateful for the help and problem solving!

The zsleeep really makes a difference in my sleep!!! They are very responsive and helful

i like ordering these supplements they help me

The customer service is very responsive. I have used the Zelenko products for years now and they really helped me with my health issues.

I love my Z-Stack!! This month my package arrived opened and empty! I reached out and within a short while a replacement order was on the way! Thank you for your unmatched customer service!

I have been taking Z-Stack for years. I know without s doubt it has helped me fight off colds and other ailments. Several years ago, I got COVID, even after taking 3 sticks(never again) but with all the ingredients in Z-Stack, it was like having a mild cold and it was gone in days. I WILL ALWAYS use Z-Stack as I do believe in the founding father and now the company.
Jeff

I have been taking Z-Stack since COVID. I am 70+ years old and I have not had any illness. I even went to Mexico the end of Oct/Nov 2020 with no issues. I highly recommend this product. I have made other International trips in the last few years and faithfully take Z-Stack.

When I contacted Shannon from Zelenko labs about my missing shipment, she immediately replaced it with another one. I greatly appreciate the value they see in their customers and vice versa.

I have taken Z Stack since 2021 and have not had a sick day in the time since. Never got Covid. Very good immune protection. (I added K2 to the regimen some time thereafter due to learning that this is needed with the D3 to redirect calcium from the arteries.)
Dr Zelenco has passed, but his legacy continues on with this great formula Z Stack.

I have been on this product since 2022 and have not had a sick day since

For three years Z-Stack ihas been an exceptional preventive against bacteria and virus both - takes me literally 15 minute to break an attack. It also seems to prevent Covid 19. No side effects at all except good health. Most grateful to Dr. Z.

On-line customer service was excellent. Responded to me in less than 2 hours. Issue was resolved quickly an efficiently. BEST customer service I have ever recieved.