Z-Flu - Elderberry Immunity Gummies

Z-Flu is one of Dr. Zelenko's premier products that he specifically designed to support immune health in a great-tasting strawberry flavored gummy.

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-Flu.

Z-Flu has all the same ingredients you have come to love about Z-Stack plus Elderberry in a unique gummy delivery system.

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

The ingredients in each gummy of Z-Flu weren't chosen at random – they were chosen specifically for their natural abilities which may help support your immune system and provide natural defenses when you need it most.

Explore the natural ingredients in Z-Flu

Vitamin C (click to expand)

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

Vitamin D has been shown to increase intestinal calcium and phosphate absorption in the body.


Zinc is a nutrient found throughout your body that may support your immune system and metabolic function. Studies have shown that if zinc supplementation is started within 24 hours of cold or flu symptoms starting, it may help decrease severity of symptoms.


Quercetin may promote a healthy inflammatory response. This nutrient may help your body better absorb and utilize vital nutrients like Vitamin C.


Packed with antioxidants, elderberry may support the immune system.

Making sure your body takes in enough elemental zinc into the cells has always been at the forefront of Dr. Zelenko's philosophy to boosting immune defenses.

Z-Stack Dr. Zelenko Vitamin Dietary Supplement Immune Support Supplements | Immune System Booster | Z-Stack®

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

Experience Dr. Zelenko's premier immunity supplemement. Use Z-Flu for daily prevention and for that extra boost of immune support when you need it most.

The ingredients in Z-Stack – Vitamin C, D, Zinc, and Quercetin – work synergestically to maximize absorption of each other and support healthy cellular activity. With the addition of Elderberry, the Z-Flu formula takes immune support to the next level.

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, vegetarian, and gluten-free.

Z-Flu was forumulated to be safe, healthy, and taken by people from all walks of life.


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