Z-STACKZelenko 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 [email protected]
Z-STACK (zstacklife.com) has 95 customer reviews on Five Star Index, with an average rating of 4.1 out of 5.
Is this your business?
Correct your details and reply to customers in public. Both are free.
Claim this listing
Personal Care · Orlando, Florida
Excellent
Personal Care · Grants Pass, Oregon
Excellent
Personal Care · Great Neck, NY
Excellent
Personal Care · Costa Mesa, California
Excellent
Showing 1 review with 2 stars · Clear filters
Lisa
Disappointed that the order default is automatically on SUBSCRIPTION. You have to OPT into a 1 time order. Feels deceptive and only way to correct it is by contacting the co. You can't correct online.
Response from Z-STACKOct 7, 2026
This is incorrect. Please see our Youtube videos on how to Login and Manage your Subscription: https://www.youtube.com/@zstackofficial