Z-Stack bottle with green apple, botanicals and four ingredient powders

Seasonal Support,
at Clinical Doses.

Four immune-support nutrients in one simple morning routine. The doses are printed on the label, where you can read them.*

Ten Seconds
Every Morning
Doctor
Formulated
Made in
the USA

Order Z-Stack^® Now

Cancel in Two Clicks
Call 1-800-ZELENKO
30-Day Money-Back Guarantee

Daily Immune
Support*
Travel to
See Family
Babysitting
the Grandkids
A Routine
Worth Keeping
Proactive
Wellness

K
KOSHER
CERTIFIED
cGMP
cGMP
CERTIFIED
MADE IN
USA
NON-GMO
INGREDIENTS
V
100%
VEGETARIAN
GLUTEN
FREE

Clinically Dosed Ingredients

Z-Stack^® Key Ingredients

Vitamin C

800 mg · Immune Support*

Vitamin D3

125 mcg · Bone & Immune Health*

Zinc

30 mg picolinate · Immune Support*

Quercetin

500 mg · Antioxidant Support*

Z-Stack^® vs. Four Separate Bottles

4 Essentials in 1 Formula
One Simple Daily Routine
Doctor-Formulated
Doses Printed on the Label
Better Value

Z-Stack^®

$55

Per Bottle

Four separate white supplement bottles labelled Vitamin C, Vitamin D3, Zinc and Quercetin

4 Separate Supplements
6+ Pills Every Day
Hard to Keep Straight
Doses Vary by Brand
Higher Cost

Four Bottles

$70–$125

Combined, Per Bottle Each

Why not the $9 bottle?

Read the Label. Most Brands Won’t Show You Theirs.

A drugstore zinc is a single ingredient at whatever dose fit the tablet. Z-Stack^® is four nutrients, each at a clinical dose, and every amount is printed where you can check it.

Ingredient	Form	Per serving
Vitamin C	Ascorbic acid	800 mg
Vitamin D3	Cholecalciferol	125 mcg (5,000 IU)
Zinc	Zinc picolinate	30 mg
Quercetin	Quercetin dihydrate	500 mg

Amounts per serving as printed on the Supplement Facts panel. Made in the USA in a cGMP-certified facility. Third-party tested.

Real People. Real Routines.

“I have kept it on my counter for four years. It is just part of my morning now.”

Carol W.

“I read the label before I buy anything. This one actually prints the doses.”

Judith P.

“I called with a question about my subscription and a real person picked up.”

Barbara H.

Science. Experience. Trust.

Formulated by Dr. Zelenko

Z-Stack^® was created by Dr. Zelenko, a board-certified physician, to provide everyday immune support with four essential ingredients at clinical doses in one convenient formula.

Doctor
Formulated
Clinically
Dosed
Label
Transparency
Trusted
Quality

No guessing. No hassle.

Built to Fit the Routine You Already Have.

A subscription should make the morning simpler, not add something to worry about.

A Real Person Answers

Questions about your order or your subscription? Call 1-800-ZELENKO. US-based support, every time.

Cancel in Two Clicks

Pause, skip a month, or cancel from your account page. No phone tree, no surprise charges.

30-Day Money-Back Guarantee

If it does not fit your routine, send it back within 30 days for a full refund.

Your Routine.
Simplified.