ZELENKO LABS Reviews

Been taking Z Stack for about six years now, starting when everything began. It's become my trusted immune support and I lean on it as my main wellness tool. I also use Z Night for better sleep and count on this company for my overall health needs.

My wife and I think Zstack is the best supplement we've ever used. We haven't gotten sick once since we started taking it. The formula has everything our bodies need. Our only complaint is the shipping cost, which is almost as much as a bottle itself. We'd like to keep buying it, but the postage is really holding us back. Otherwise we'd suggest this to anyone.

I've been buying these products for several years and am very satisfied with what I'm getting. Both the products themselves and how they handle customer service have been great.

Zflu has been my go-to since Dr. Zelensky created it. All the vitamins and minerals you need to fight off the flu are right in one product, so you don't have to buy a bunch of individual supplements. My grandson takes the Kids version and I've told everyone about it. We stay healthy all year because of this.

The main issue I had was getting credit card promotional emails mixed in with my order notifications, but after asking about it, they explained it was from cookies and third party services, not from them. I've been using Dr Zelenko's stuff since everything started and never had a real problem. Their customer service team actually responds personally, not with some generic template. I get Z-Stack for my 92 year old mother and my 10 year old grandson too. The only hiccup was when Z-Night needed a formula change due to an ingredient becoming prescription-only, but they reformulated it quickly and got it back on shelves. The new version works just as well and I'm asleep within thirty minutes of taking it.

We placed a big order and it got to us in about a week. One bottle arrived with a broken capsule that had leaked inside, but the moment we sent a photo to the company, they replaced everything right away. That's the kind of service that keeps us coming back.

Using both Z-Stack and Z-Night and they're both excellent. Z-Stack gives me solid daily immune support while Z-Night helps me wind down and sleep soundly without any grogginess the next morning. The formulas are clean and natural, and I trust the brand completely. Definitely would tell others to try it.

I've been on Z-Stack for almost 4 years and literally haven't gotten sick since starting it. I'm 72 and do full time childcare for my granddaughter, so germs are everywhere, but we both stay healthy. She takes the Kid's Z-Spike gummies and doesn't get sick either. All those negative reviews don't add up to my experience. I call customer service all the time during business hours and always get a live American rep who's super helpful. Their number is on the site if you need them. The product itself is amazing and it's crazy to me that at 72 I haven't been sick in 4 years. Don't believe the bad reviews.

Started taking Z Stack right when Dr. Zelenko's wellness protocol came out and never looked back. Been using it since the beginning and can say I've stayed healthy through everything. Haven't caught any bugs or respiratory issues. Plan to keep using this as long as it's available.

Something's not right with how this company operates. I ordered 2 bottles of Z-Flu on April 30th and received an email a week later saying there was an unexpected backorder and they couldn't ship as planned. Since then I've sent many emails asking for a refund back to my credit card, but here we are on May 15th and nothing. This isn't the first time they've failed to deliver on my order. I gave them another chance but I'm done. Stay away from this place.