• Z-Stack Zinc Vitamin Zelenko
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  • Z-Stack Comparison Chart
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  • Z-Stack Zinc Vitamin Zelenko
  • Image of bottle | Test group A Zelenko Vitamins
  • Z-Stack Ingredients on apple background
  • z-stack benefits with bottle and two capsules
  • Z-Stack review with image of woman on couch with glass of water
  • Z-Stack Comparison Chart
  • Z-Stack supplement facts
Immunity Support

Z-Stack®

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$55.00 $55.00

One-Time Purchase

$55.00

🇺🇸 25% OFF SITEWIDE | USE CODE: INDEPENDENCE25 🇺🇸

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.

Clinically Proven

Z-Stack® Key Ingredients

The carefully selected ingredients in Z-Stack® – Vitamin C, Vitamin D3, Zinc, and Quercetin – work in harmony to enhance each other’s absorption, promoting optimal immune support and healthy cellular function.

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.
The raw ingredients in Z-Stack The raw ingredients in Z-Stack
The raw ingredients in Z-Stack

Vitamin C has been shown to play a complex, protective role against toxic compounds formed from oxidized lipids and may support overall immune health.

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.

Vitamin D3 has been shown to increase intestinal calcium and phosphate absorption, helping maintain strong bones.

Zinc is a nutrient found throughout your body that may support your immune system and metabolic function.
Z-Stack benefits banner Z-Stack benefits banner

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.

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Builds Strong, Daily Immune Defense

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Promotes a Balanced Immune Response

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Delivers Nutrients Where It Matters

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Doctor-Formulated & Clinically Dosed

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VITAMIN C

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$15 - $25

QUERCITEN

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$25 - $45

VITAMIN D3

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$15 - $30

ZINC

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$15 - $25

TOTAL (USD):

$55

$70 - $125

Questions Customers Ask Most

Z-Stack® is an all-in-one immune support formula designed to provide key nutrients your body relies on for daily immune defense. Each serving combines vitamin C, vitamin D3, zinc, and quercetin, ingredients selected to work together to support immune function, antioxidant protection, and healthy cellular activity.

Unlike many standard vitamin blends, Z-Stack® was developed from the research and clinical insights of Dr. Vladimir “Zev” Zelenko. Each component was carefully selected to work synergistically, helping support immune function and overall wellness in a single, convenient daily formula.

The ingredients in Z-Stack® are designed to work synergistically. Quercetin acts as a zinc ionophore, helping transport zinc into cells, while vitamins C and D3 support immune response and antioxidant protection—helping your body maintain strong natural defenses.

Z-Stack® is typically taken once daily as a two-capsule serving, making it a convenient way to support immune health with multiple nutrients in one formula rather than taking separate supplements.

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Trusted Wellness, Real Feedback

"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!"

Lynne J. 🇺🇸

"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."

Brian H. 🇺🇸

“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.”

Linda M. 🇺🇸