Z-STACKReviews of zstacklife.com

I started taking Z Stack as part of Dr. Zelenko's prophylactic Covid protocol, as soon as it became available. I am unvaxxed, did NOT get Covid and did not get any flu or respiratory infection. I'll take these as long as they are available.

Not sure what is going on with this company, but it is not good. After I placed an order for 2 bottles of Z-Flu on 04/30/25, they sent an e-mail on 05/08/25 saying..."We’re reaching out with an important update about your recent order for Z-Flu.Due to an unexpected backorder, we’re currently unable to ship your Z-Flu bottle as scheduled. We sincerely apologize for the inconvenience and are working hard to resolve the issue as quickly as possible". I have sent NUMEROUS e-mails telling them to refund my money to my credit card. Today is 05/15/25 and they have still not refunded my money! This is not the first time this company has not fulfilled my order, but I thought I'd give them one last try. NEVER AGAIN! BUYER BEWARE!

Does anyone else's Zstack smell/taste like stink bugs? I've been getting this product for years and it never smelled like this! I've actually gotten sick/upset stomach, so have to stop taking it. I too, have had issues with getting my purchases timely and noticed that you cannot remove/delete credit cards that you put on file. I've referred family & friends to this product but no more!

I’ve been using Z-stack and Z-Flu for 3-4 years now and liked it. From my experience their customer service has become horrendous! In the past you could speak with a real person. Not anymore. It’s all automated via email only. I’m still waiting on an order from their Black Friday sale November 28th! Another two orders from December and January also. They keep saying “shipping tracking numbers going out this week.” But it never happens. Right now I’m out nearly $160 and I have a bad feeling they are blowing me off. If I ever get my order, I will not purchase anymore. I use to recommend their products, but now I’m embarrassed that I did. Use caution when ordering.

I've been taking 2/daily Z-Stack (monthly auto-ship) since hearing Dr Zelenko speak several years ago. I am a frail 85# 75 yr old with advanced COPD/Bronchitis that has not had so much as a cold or a flair-up since & still going strong. Prior, I would have 3-4 severe, lengthy flair-ups annually. It's been a blessing for me.

Absolutely horrible service I have been charged twice and not received my kid's vitamins. They charged me once for an order I didn't place. I received a terrible quality product in the summer months that looked like it had melted during shipping. Definitely do NOT do business with this company.

Good products but their customer service is the absolute worst! We received kids products that were not as advertised nor what we had received in prior orders. I asked for replacement products to be sent. They want me to pack up the products received, mail them back and pay for the shipping! Totally ridiculous! Not how you run a successful business and want to keep returning customers!

Customer service is the worst. The label was created, but never received by the post office. When I got Larry on the phone, he blamed the post office. No response to emails. I will notify my credit card company to get my money back. Do not do business with this company! They simply do not care and probably over priced?