The Perfect Pairing

Save 25% When You Buy Z-Stack + ZELENKO together!

You already know and trust Z-Stack, which Dr. Zelenko created to allow people all across the globe to take control of their health without relying on the corrupting power of big pharma.

Now we're offering a special bonus for a very limited time.

When you buy Z-Stack, we will include Dr. Zelenko's book "Zelenko How to Decapitate the Serpent" at 25% Off. The ultimate roadmap on how to fight back.  

Dr. Zelenko's promise was to support and strengthen your immune system. Z-Stack – provides you the best fighting chance at building a more robust, resilient immune system.

Paired with Dr. Zelenko's book you've got the perfect pairing to rest and restore!

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Your all-in-one immune support formula.

Z-Stack® is one of Dr. Zelenko's premier products that he specifically designed to support your body's natural immune system.

With decades of experience in the medical field, the knowledge Dr. Zelenko has gained over the years led to him formulating his own supplement, which we now know as Z-Stack™.

Z-Stack is based on Dr. Zelenko's years of extensive published scientific research – and now made available to you.

Z-Stack was developed with real, all-natural ingredients.

The ingredients in each capsule of Z-Stack weren't chosen at random – they were chosen specifically for their natural ability to help support your immune system when you need it most.

Explore the natural ingredients in Z-Stack

Vitamin C 

Supplementation of vitamin C may improve components of the human immune system.

Vitamin D3

Vitamin D may support a resilient immune system by fortifying your body's defenses against bacteria and viruses.


Zinc is a nutrient found throughout your body, that helps your immune system and metabolism function. Evidence suggests that if zinc supplementation is started within 24 hours of cold/flu symptoms starting, the supplement can help shorten the duration of illness.


Quercetin promotes a healthy inflammatory response, while supporting sinus and upper respiratory health. This nutrient helps your body better absorb and utilize vital nutrients like Vitamin C.

Dr. Zelenko knew the importance of immune health for optimum wellness.

Each product from Z-Stack was built from Dr. Zev Zelenko's critical research into natural immunity.

Z-Stack's immune support properties mean it is a wonderful preventative as well as a treatment for illness.

The Zelenko Way

Free shipping on all orders

All Zelenko products feature fast, free shipping on all orders because we know how important it is to stay healthy.

Quality guaranteed

Dr. Zelenko built his legacy on the same products that bear his name to this day. Zelenko Labs stands behind its products with a 100% satisfaction guarantee.

Kosher and gluten-free.

Zelenko Labs' products are formulated to be safe and healthy. Our supplements can be taken by people from all walks of life and dietary needs.


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