Z-STACK Avis 

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

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.

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.

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!!

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.

I had just posted that I didn’t receive my zstack but just deleted it because I received it today. It took a little over a month. I was upset because nobody returns calls
And we kept getting emails to order more.
Anyway will start taking them tomorrow! I’ve already had covid but wanted to continue to take the supplements to keep my immunity up!

I payed on a credit card I rarely use and after there were $2000 worth of fraud that occurred after my legit order with this company. Is this a scam going on? My credit card company took care of the fraudulent charges and sent me a new card. My order for a few bottles of Z-stack placed on Sept. 30th then I received an email on October 8th saying product was in the mail and now on October 28th product still has not been received. I have called the credit card company to dispute this charge.

I finally did receive the product after 23 days. Of course I tried calling and emailing with no response. Supposedly they were waiting for a shipment to come in. There was no action till I contacted PayPal about the purchase. Then my item was shipped the next day. I don’t know about the quality yet but I know it comes highly recommended. I will give it a chance.
I want to add that I did receive the product and was sent an extra bottle. I’m going to give them another try. It certainly is easier taking it and only two pills rather than six or eight.

I ordered a product (order 12085) from them on 2nd September for posting to Australia. For some reason it did not leave USA but was returned to them by US Postal Service on 20th September.
I have sent 4 emails, left a message on their website and never received one reply.
In frustration I rang them on 4th October (3rd Oct US time) and they promised to re-post to me and let me know the new Tracking details by 7th October, still no advice received as at 10th Oct. They may have a good product but their customer relations service is non existent.

This is an excellent product. Just like in a Rolls Royce Car Dealer, if you can't afford to buy or don't even ask how much? Salesman will tell you, "you can't afford it so just leave..."..lol... You don't bad mouth Rolls Royce coz you can't afford it do you? you're already bias her so just sit down and don't say anything about it specially if you've never tried it and too cheap to spend $$ for your own health. Did you complain about Balance of Nature $69.95 a month with auto refill every 28 days as "preferred" to get the cheaper per bottle price? Just sit down dude. If its not for you, don't but it. It's very simple.

Good product, high quality from a great source. Dr. Zelenko is a leader in his field

These good people have a site where they do not publish genuinely made reviews of their product, pricing, service levels etc. - so I have chosen to report that particular fact about the site.

They charge an arm and a leg - which they are naturally free to do - but then when reporting that as a review, they do not post it. That is not genuine. I will indeed revise this statement here, if they start posting reviews honestly.