Z-Stack®
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One-Time Purchase
AS LOW AS $1.50/DAY + FREE U.S. SHIPPING 🇺🇸
Z-Stack® is perfect for people who:
✔ Want daily immune support
✔ Travel frequently
✔ Work around children or the public
✔ Have demanding or busy lifestyles
✔ Take a proactive approach to their wellness
Z-Stack® is Dr. Zelenko’s original formulation and the foundation of the Zelenko Protocol. Drawing on decades of experience as a board-certified family physician, he developed Z-Stack® from real-world clinical insight to support the body’s natural immune defenses.
Carefully crafted with physician-guided expertise, Z-Stack® features targeted, clinically dosed ingredients designed to help maintain a strong, balanced immune system – continuing Dr. Zelenko’s mission of practical, science-based wellness support.
As a dietary supplement, adults take two (2) capsules daily or as directed by a healthcare provider.
Warning:
Z-Stack® contains quercetin and should not be used if you are pregnant or nursing.
Vitamin C (as Ascorbic Acid) 800mg, Vitamin D3 (as Cholecalciferol) 125 mcg, Zinc (as Zinc Picolinate) 30 mg, Quercetin Dihydrate 95% (as Sophora Japonica) 500 mg
Subscribing monthly means more than convenience and savings – it’s joining an exclusive community committed to proactive health.
Enjoy special savings, priority access, automatic delivery, and subscriber-only health content designed to keep you informed and ahead.
Vitamin C has been shown to play a complex, protective role against toxic compounds formed from oxidized lipids and may support overall immune health.
Vitamin D3 has been shown to increase intestinal calcium and phosphate absorption, helping maintain strong bones.
Quercetin supports a healthy inflammatory response and functions as a zinc ionophore, helping shuttle zinc into cells so your body can better absorb and utilize it.
Zinc is a nutrient found throughout your body that may support your immune system and metabolic function.
Z-Stack® vs the Alternative
High-end quality, fewer pills, and better value. Z-Stack® combines multiple essential supplements into a single, clinically dosed, and convenient formula.
Builds Strong, Daily Immune Defense
Promotes a Balanced Immune Response
Delivers Nutrients Where It Matters
Doctor-Formulated & Clinically Dosed
VITAMIN C
$15 - $25
QUERCITEN
$25 - $45
VITAMIN D3
$15 - $30
ZINC
$15 - $25
TOTAL (USD):
$55
$70 - $125
"The ingredients in Z-Stack work miracles in my body. I can only remember getting sick like everyone around me once since I began taking this formula. Recently I was exposed a number of times to a common illness of 10+ days of severe congestion/cough and weakness. I spent time with these people, nursing them back to health. Did I get the same illness? NO - I love Z-Stack!"
"I am not a medical lab technician. I take several different items I have chosen to use in order to maintain my health. I literally cannot tell you what each one is specifically doing for me inside my body. I can say that since I have been using Z-Stack, and others, I have been very healthy on a constant basis. Thank you."
“We take Z-Stack daily and it helps us to keep healthy especially during this time of year. The Z-Stack Original has all the basic ingredients to help the immune system in the right proportion. It simplifies our lifestyle so instead of taking 4 to 5 other pills in combinations we only take 2 a day.”
