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Z-stack is an Immune System FormulaDeveloped by Dr. Vladimir (Zev) Zelenko OBMto Prevent & Treat Viruses and Maximize Your Immune FunctionExpires 11/2026 Contains Zinc sulfate, Quercetin dihydrate, Vitamin C, Vitamin D. Zinc Immune Support Zinc is one of the active ingredients in Z-Stack. It is one of the most well-known immune support ingredients to date. Quercetin Plant-based Nutrients Quercetin is a leading active ingredient in Z-Stack. Being a plant flavonol, quercetin is a natural source of vital nutrients. Vitamin C Vitamin C is an essential nutrient involved in the repair of tissue and the enzymatic production of certain neurotransmitters Vitamin D Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects Immune Function Suggested use Take 2 Capsules Per Day.to inhibit the replication of RNA viruses Other information Brand / Zelenko Labs Product / Z-Stack Formulated By / Dr. Zelenko Function / Maximize Immune Function Suggested Use / 2 Capsules per Day Bottle Size / 60 Capsules Ingredients / Zinc, Quercetin, Vitamin C, Vitamin D Certifications / Kosher, GMP, FDA Manufactured In / United States Frequently Asked Questions Who is Dr. Vladimir Zelenko? Dr. Vladimir Zev Zelenko M.D. is a board-certified family physician. Dr. Zelenko has practiced family medicine in New York’s HudsonValley. He has been described by his patients as a family member to thousands of families and is a medical adviser to the volunteer ambulance corps in Kiryas Joel, New York. Dr. Zelenko is known for developing his now-famous “Zelenko Protocol,” which has saved countless lives worldwide. What is Quercitin & How Does It Support the Immune System? Quercetin is known for its antioxidant activity in radical-scavenging and anti-allergic properties characterized by stimulation of the immune system, antiviral activity, and more. Quercetin has a number of great health-promoting benefits. Some of the top Quercetin benefits include the ability to help your body reduce inflammation and to improve your immune system’s health. Research has shown that Quercetin has powerful anti-inflammatory and antioxidant effects. It was recently published in the journal of Nutrients in 2016, that Quercetin is a safe and effective supplement both for reducing inflammation and for improving immune system functions. What is Zinc & How Does It Support the Immune System? Zinc is found in cells throughout the body. It helps the immune system fight off invading bacteria and viruses. Zinc is essential for our immune system because it affects how our cells respond to infections. It can also help keep inflammation under control. Zinc increases the activation of cells in the body that are responsible for fighting infection. It also activates enzymes that break down proteins in viruses and bacteria to reduce the chances of spreading. Due to its direct antiviral properties, it can be assumed that zinc administration is beneficial for most of the population, especially those with suboptimal zinc status. What is Vitamin D & How Does It Support the Immune System? Vitamin D is effective for COVI… Random effects meta-analysis of the 11 treatment studies to date shows an estimated reduction of 75% in the effect measured. Sufficiency studies show a strong association between vitamin D sufficiency and outcomes. Meta-analysis of the 24 sufficiency studies shows an estimated reduction of 58% What is Vitamin C & How Does It Support the Immune System? Vitamin C, or ascorbic acid, is a water-soluble vitamin well known for its role in supporting a healthy immune system. Vitamin C contributes to immune defense by supporting various cellular functions of both the innate and adaptive immune systems. Because our bodies cannot make vitamin C, it must come from the foods you eat every day. Research shows vitamin C is essential for the growth and repair of tissue all over the body. Vitamin C helps heal wounds and repair and maintain healthy bones, teeth, skin and cartilage — a type of firm tissue that covers the bones. Taking vitamin C supplements appears to be able to both prevent and treat respiratory and systemic infections. Free shipping to the continental USA