Dr. Zelenko's original formula
Try Z-Stack for just $4.95
5.0 from 1,849 verified reviews
“Great product have been using it for 6 years and shared with my family to help boost their immune systems, thank you.”
Tracy M., verified buyer
Z-Stack® Full Month Supply
- Save over $50 on your first bottle, then $45.10 monthly
- Choose a free gift that ships with your first full-price order
- Cancel anytime. No commitment.
In your cart: Your gift is your free gift
1-800-ZELENKOZ-Stack® Full Month Supply
- One bottle, a 30-day supply. No subscription
One bottle instead of four.
Buying these ingredients separately costs $70 to $125 a month. Z-Stack® combines all four in one formula, and autoship brings it to $45.10.
| Ingredient | Z-Stack® | Separately |
|---|---|---|
| Vitamin C | ✓ | $15 - $25 |
| Quercetin | ✓ | $25 - $45 |
| Vitamin D3 | ✓ | $15 - $30 |
| Zinc | ✓ | $15 - $25 |
| Total (USD) | $55 | $70 - $125 |
Comparison based on the current average retail price of comparable low- and mid-range dietary supplements sold in the U.S.
Four ingredients. One stack.
Instead of four bottles on the counter, every two-capsule serving layers Vitamin C, Vitamin D3, Zinc and Quercetin together.*
Why they're paired. Quercetin acts as a zinc ionophore, helping shuttle zinc into cells so your body can better absorb and use it.*
Vitamin C
800 mg889% DV
An essential antioxidant nutrient that may support overall immune health.*
Vitamin D3
125 mcg625% DV
Increases intestinal calcium and phosphate absorption, helping maintain strong bones.*
Zinc
30 mg273% DV
A nutrient found throughout your body that may support your immune system and metabolic function.*
Quercetin
500 mgfrom Sophora japonica
Supports a healthy inflammatory response and acts as a zinc ionophore, helping shuttle zinc into cells.*
See the full supplement facts
Contains quercetin. Do not use if pregnant or nursing.
From people who take it daily.
★★★★★"I have been taking Z-Stack for many years. I love the benefit of having Zinc, C, D and Quercetin in one capsule. Excellent product! Highly recommend!"
★★★★★"Excellent quality. I can feel the difference when I use them regularly. This is the 3rd bottle I have used. Highly recommend."
★★★★★"Excellent product. Have been getting Z-Stack for several years on a monthly subscription. Introduced my son to it also."
★★★★★"Z-Stack has been good company to do business with. There ordering system with reminders is easy to use and most importantly when one of my deliveries was stolen they replaced it free of charge. I have been ordering through them for about 6 years."
★★★★★"I have used Z-stack since 2020. I am pleased with it and have given bottles away as gifts to start my friends on these great vitamins."
★★★★★"Love supporting this awesome organization and awesome product! Been taking for many years now, and take two a day, every day"
Unedited 5-star reviews from verified Z-Stack® buyers on zstacklife.com.
How autoship works.
-
01
First order
Start for $4.95
Your first full bottle, 60 capsules, ships for $4.95 plus S&H. Pick your free gift in the next step.
-
02
Every day
Two capsules a day
Adults take two capsules daily, or as directed by a healthcare provider. One serving replaces four separate supplements.
-
03
Every 30 days
Stay consistent
A fresh bottle arrives every 30 days at the subscriber price of $45.10. Your free gift ships with the first one. Change, skip or cancel whenever you like.
Made for people who plan ahead.
From the first coffee to the last email, Z-Stack® fits the whole day.
Daily immune support*
Two capsules with breakfast
Frequent travelers
Airports, flights, hotels
Around kids & crowds
Classrooms, offices, stores
Busy, demanding days
Back-to-back schedules
Proactive about wellness
A routine that runs on autoship
Questions, answered.
How does the $4.95 offer work?
Choose Autoship and your first bottle of Z-Stack® (60 capsules, a 30-day supply) is $4.95 plus shipping and handling. After that, a new bottle ships every 30 days at the subscriber price of $45.10. The $4.95 price applies to your first autoship order only.
What's the free gift?
When you tap Buy Now, you pick one of three free gifts before checkout. It ships free with your first full-price autoship order (your 2nd delivery).
What's the monthly cost after my first order?
$45.10 every 30 days, 18% below the one-time price of $55. Subscribers also earn 10% back in store credit through Zelenko Subscriber Rewards.
Can I change or cancel my autoship?
Yes. Change your delivery schedule, skip a shipment or cancel anytime from your account. There's no commitment.
What is Z-Stack®?
Z-Stack® is Dr. Vladimir "Zev" Zelenko's original formulation and the foundation of the Zelenko Protocol: Vitamin C, Vitamin D3, Zinc and Quercetin in one daily formula to support immune function, antioxidant activity and healthy cellular function.*
How should I take it?
Adults take two capsules daily, or as directed by a healthcare provider. Each bottle holds 30 servings.
Who should not take Z-Stack®?
Z-Stack® contains quercetin and should not be used if you are pregnant or nursing. Talk to your healthcare provider if you take medication or have a medical condition.
