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.

The Calm and Sleep Bundle in a bathroom setting The Calm and Sleep Bundle in a bathroom setting

What This Bundle Delivers

  • Clinically dosed to strengthen immune defence
  • Promotes calm and helps regulate the stress response
  • Supports deep, restorative sleep for overnight recovery
  • Complete system for calm, resilience & restoration
Lady with a wooden basket and wicker hat Lady with a wooden basket and wicker hat

Why It Works

Your body is constantly managing stress during the day and recovering at night.

Z-Stack® supports daily immune defense, helping your system stay strong and resilient.

Z-Calm™ helps regulate your stress response – so you stay balanced, focused, and in control.

Z-Night™ helps your body enter deep, restorative sleep – when recovery happens and immunity is built.

Less stress + quality sleep + better recovery = optimal day-to-night resilience.

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.

Z-Calm™ is a physician-formulated supplement developed by Dr. Vladimir Zelenko to support mental clarity, emotional balance, and a healthy stress response. It combines plant-based ingredients and antioxidants that help the body naturally adapt to everyday stress and promote a sense of calm.

Z-Calm™ includes ingredients traditionally used to support mood balance and relaxation by promoting healthy neurotransmitter activity and antioxidant support. This helps your body maintain emotional balance and stay resilient during periods of stress.

Z-Calm™ is ideal for individuals experiencing daily stress, mental fatigue, or mood imbalances, or anyone looking to support focus and emotional wellness as part of a daily routine. It’s especially helpful in today’s fast-paced, high-stress environments.

Z-Night™ is a nighttime supplement designed to support restful, high-quality sleep and help your body unwind at the end of the day. It works by promoting relaxation and supporting your natural sleep cycle, so you can fall asleep more easily and wake up feeling refreshed.

Z-Night™ is formulated to support sleep without relying on harsh or habit-forming ingredients. Instead, it focuses on helping your body relax naturally and maintain a healthy sleep rhythm, making it ideal for consistent nightly use.

Z-Night™ is designed to support restful sleep while helping you wake up feeling clear and refreshed, not sluggish. It works with your body’s natural rhythms rather than overpowering them.

Z-Night™ is ideal for individuals who have trouble winding down at night, experience occasional restless sleep, or want to improve overall sleep quality as part of a healthy routine.

Discover Our Wellness Bundles


Trusted Wellness, Real Feedback

“Best product ever. Am loyal to the late Zelenko family who invented the protocol. Others have copied his material and shame on them. I’m a lifelong subscriber and we never ever got the virus!”

Margaret K. 🇺🇸

"I am comfortable and reassured knowing that I am taking the best multi-vitamin on the market. The Z-Night is not as strong (for me) as other over the counter products (such as AdvilPM) but I know it is better for my body. "

Ellen S. 🇺🇸

“I am incredibly grateful for Z-Calm supplement! After just ten days, my daughter's anxiety and overthinking have significantly improved. It's been a gamechanger for her, and I just want to say thank you so much!”

Julia N. 🇺🇸