My issue was getting " offers" from Capitol One credit cards on my notification emails, I asked about it, its a cookies or 3rd party thing, not Zelenko Labs. I have been using Dr Zelenko's products since the covid debacle, never had a problem. Customer Service was always there to answer any questions, emailed personally, to me, not some "canned" answer. I also order Zstack for my 92 year old mom and my 10 year old grandson....only issue I've ever had was when they had to change the formula for Z-Night (one ingredient moved to needing a prescription), it took a little while, but it was reforulated and back in stock asap. The new formula is just as good as the old one was, half an hour after to taking, Im off to a "gentle" restful sleep !
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Zelenko Labs, built on the legacy of Dr. Vladimir Zelenko, creates products with purpose, precision, and integrity. Every formulation is made with high-quality ingredients and consistent standards, so you can feel confident in what you’re using. Thoughtful, reliable, and principled — Zelenko Labs products are made for people who care about quality.
Our All American customer service team is here to help Monday through Friday, 9 AM to 5 PM EST — just give us a call at 1-800-ZELENKO (1-800-935-3656) or email our team at support@zstacklife.comSee more
