27:I[56264,["/_next/static/chunks/3fntmmi971322.js","/_next/static/chunks/1ymt1shyhmu-4.js","/_next/static/chunks/291ciwmgtp_xc.js","/_next/static/chunks/2owa30hnifmhr.js","/_next/static/chunks/2tie5rqwdsi89.js","/_next/static/chunks/2dnipz2c0692b.js","/_next/static/chunks/1mf5iq195c2sn.js","/_next/static/chunks/03wn0-bzh3abk.js","/_next/static/chunks/0_02m0ghanddv.js"],"GuestHistoryRecorder"] 28:I[3004,["/_next/static/chunks/3fntmmi971322.js","/_next/static/chunks/1ymt1shyhmu-4.js","/_next/static/chunks/291ciwmgtp_xc.js","/_next/static/chunks/2owa30hnifmhr.js","/_next/static/chunks/2tie5rqwdsi89.js","/_next/static/chunks/2dnipz2c0692b.js","/_next/static/chunks/1mf5iq195c2sn.js","/_next/static/chunks/03wn0-bzh3abk.js","/_next/static/chunks/0_02m0ghanddv.js"],"EmailPreview"] 2b:I[27201,["/_next/static/chunks/3fntmmi971322.js","/_next/static/chunks/1ymt1shyhmu-4.js","/_next/static/chunks/291ciwmgtp_xc.js","/_next/static/chunks/2owa30hnifmhr.js"],"IconMark"] 29:Ta1c8,

Hey-

A report last month from the National Center for Health Statistics found that nearly 3 in 4 U.S. adults felt tired or exhausted over the previous three months.

It's easy to assume the answer is simply more hours in bed, but sleep is not just time spent unconscious.

It's an active period of brain maintenance.

One system researchers are paying closer attention to is the glymphatic system, which moves fluid through the brain and clears metabolic waste.

A 2023 review published in Sleep Medicine, the official journal of the World Sleep Society, explains:

“The glymphatic system is thought to be responsible for waste clearance in the brain. As it is primarily active during sleep, different components of sleep, subjective sleep quality, and sleep patterns may contribute to glymphatic functioning.”

What does this mean for you?

Your brain produces metabolic waste as part of normal daily activity. During sleep, the glymphatic system helps move fluid through brain tissue so that some of those byproducts can be cleared, so sleep quality may matter more than whether you technically got 7 or 8 hours.

If sleep is fragmented, restless, or difficult to settle into, you may wake up feeling foggy, mentally slow, or like your brain never fully reset. That's worth noticing, since only 54.8% of U.S. adults reported waking up feeling well-rested.

Rest is not only about shutting down. It's about giving the brain time to do work it cannot do in the same way while you are awake.

That's why Dr. Zelenko developed Z-Night™, a non-melatonin formula designed to support relaxation and restful, consistent sleep that these overnight processes depend on.

With magnesium glycinate and citrate, GABA, L-theanine, and other carefully selected ingredients, Z-Night™ helps support:

A smoother transition into sleep.
Less physical tension and mental restlessness.
Refreshed mornings without next-day grogginess.

Getting through the night is one thing. Giving your brain the sleep it needs to restore is another.

GET YOUR Z-NIGHT™ TODAY!

Kosher Certified. GMP Certified. Made in the USA.

VIEW DR. ZELENKO'S COLLECTION

Look after yourself!

- Your Z-Family

Dr. Vladimir Zelenko - Father, Freedom-Fighter, Physician

Every Zelenko product is Kosher Certified, GMP Certified, 100% Vegetarian, Non-GMO, Gluten-Free, and proudly Made in the USA. We offer free shipping within the U.S. and international shipping worldwide. Thank you for your trust and support as we continue to honor and carry on Dr. Zelenko's legacy.

Subscribe & Save and enjoy the convenience of having your favorite Zelenko products delivered every 30, 45, or 60 days at discounted subscriber rates. Plus, earn 10% back in storecredits through the Zelenko Subscriber Rewards Program. Choose your schedule. Cancel anytime. 

Don't Miss Your Next Shipment. Life gets busy – and credit cards expire. An expired credit card can delay your subscription and your wellness routine. Keep your payment information up to date for uninterrupted deliveries. Update Your Payment Info

Need Help Placing Your Order? Have Questions? Call our Customer Service Team at: 1-800-ZELENKO (1-800-935-3656). Monday to Friday | 9:00am-5:00 pm EST.

No longer want to receive these emails? Unsubscribe.

Zelenko Labs 9045 La Fontana Blvd – Suite 105 Boca Raton, Florida 33434

2a:T11d7,[Zelenko Protocol ](https://zstacklife.com/) Hey- A report last month from the [National Center for Health Statistics](https://www.cdc.gov/nchs/blog/bulletin/how-common-is-fatigue-among-u-s-adults.html) found that nearly 3 in 4 U.S. adults felt tired or exhausted over the previous three months. It's easy to assume the answer is simply more hours in bed, but sleep is not just time spent unconscious. It's an active period of brain maintenance. One system researchers are paying closer attention to is the glymphatic system, which moves fluid through the brain and clears metabolic waste. A [2023 review](https://www.sciencedirect.com/science/article/abs/pii/S1389945722012205#article) published in Sleep Medicine, the official journal of the World Sleep Society, explains: “The glymphatic system is thought to be responsible for waste clearance in the brain. As it is primarily active during sleep, different components of sleep, subjective sleep quality, and sleep patterns may contribute to glymphatic functioning.” What does this mean for you? Your brain produces metabolic waste as part of normal daily activity. During sleep, the glymphatic system helps move fluid through brain tissue so that some of those byproducts can be cleared, so sleep quality may matter more than whether you technically got 7 or 8 hours. If sleep is fragmented, restless, or difficult to settle into, you may wake up feeling foggy, mentally slow, or like your brain never fully reset. That's worth noticing, since only [54.8% of U.S. adults](https://www.cdc.gov/nchs/blog/bulletin/how-common-is-fatigue-among-u-s-adults.html) reported waking up feeling well-rested. Rest is not only about shutting down. It's about giving the brain time to do work it cannot do in the same way while you are awake. That's why Dr. Zelenko developed [Z-Night™](https://zstacklife.com/products/z-night), a non-melatonin formula designed to support relaxation and restful, consistent sleep that these overnight processes depend on. With magnesium glycinate and citrate, GABA, L-theanine, and other carefully selected ingredients, [Z-Night™](https://zstacklife.com/products/z-night) helps support: - A smoother transition into sleep. - Less physical tension and mental restlessness. - Refreshed mornings without next-day grogginess. Getting through the night is one thing. Giving your brain the sleep it needs to restore is another. [GET YOUR Z-NIGHT™ TODAY!](https://zstacklife.com/products/z-night) Kosher Certified. GMP Certified. Made in the USA. [VIEW DR. ZELENKO'S COLLECTION](https://zstacklife.com/collections/adult-kids) Look after yourself! - Your Z-Family [Dr. Vladimir Zelenko - Father, Freedom-Fighter, Physician](https://zstacklife.com/) Every [Zelenko product](https://zstacklife.com/collections) is Kosher Certified, GMP Certified, 100% Vegetarian, Non-GMO, Gluten-Free, and proudly Made in the USA. We offer free shipping within the U.S. and international shipping worldwide. Thank you for your trust and support as we continue to honor and carry on Dr. Zelenko's legacy. Subscribe & Save and enjoy the convenience of having your favorite Zelenko products delivered every 30, 45, or 60 days at discounted subscriber rates. Plus, earn 10% back in storecredits through the Zelenko Subscriber Rewards Program. Choose your schedule. Cancel anytime.  Don't Miss Your Next Shipment. Life gets busy – and credit cards expire. An expired credit card can delay your subscription and your wellness routine. Keep your payment information up to date for uninterrupted deliveries. [Update Your Payment Info](https://my.zstacklife.com/login?) Need Help Placing Your Order? Have Questions? Call our Customer Service Team at: 1-800-ZELENKO (1-800-935-3656). Monday to Friday | 9:00am-5:00 pm EST. [The Zelenko Standard ](https://zstacklife.com/) [The Zelenko Standard ](https://zstacklife.com/) [Zelenko Labs - All Products](https://zstacklife.com/collections/adult-kids) [Zelenko Labs - Ingredients](https://zstacklife.com/pages/the-science) [About Zelenko](https://zstacklife.com/pages/dr-zelenko) [Blog](https://zstacklife.com/blogs/news) [Zelenko Labs](https://zstacklife.com/) No longer want to receive these emails? [Unsubscribe](https://manage.kmail-lists.com/subscriptions/unsubscribe?a=W7zGz2&c=01KZJ0J6T00SJAZYTJP6E316EQ&k=2f058afec1e02653fb4ec5f0ff46ceaa&se=zstacklife%40mailspo.com&m=01M356R390FHTVR23C1KVTMVEG&r=01M49NCSVTNBGXA8JDZQGY307J).Zelenko Labs 9045 La Fontana Blvd – Suite 105 Boca Raton, Florida 33434 1f:["$","article",null,{"className":"min-w-0 flex-1 overflow-hidden","aria-label":"Why Are So Many Americans Still Tired?","children":[["$","$L27",null,{"emailId":"06c22527-e72b-4bf2-b7b8-838db5777b8c"}],["$","$L28",null,{"email":{"id":"06c22527-e72b-4bf2-b7b8-838db5777b8c","subject":"Why Are So Many Americans Still Tired?","previewText":"[Zelenko Protocol ](https://zstacklife.com/)\n\n \n\nHey-\n\nA report last month from the [National Center for Health Statistics](https://www.cdc.gov/nchs/blog/bulletin/how-common-is-fatigue-among-u-s-adults.html) found that nearly 3 in 4 U.S. adults felt tired or exhausted over the previous three months.","sentAt":"2026-10-06T22:45:05.000Z","classification":"marketing","imageCount":10,"thumbnailUrl":"https://mailspo-ingest.imraan-243.workers.dev/img/renders/06c22527-e72b-4bf2-b7b8-838db5777b8c.jpg","emailType":"sale_promotion","typeConfidence":"guess","typeBasis":"matched the body copy","brand":"$25:props:brands:1344","bodyHtml":"$29","textBody":"$2a","bodyFallback":null}}]]}] a:null f:[["$","title","0",{"children":"Why Are So Many Americans Still Tired? by ZStack | Mailspo"}],["$","meta","1",{"name":"description","content":"[Zelenko Protocol ](https://zstacklife.com/)\n\n \n\nHey-\n\nA report last month from the [National Center for Health Statistics](https://www.cdc.gov/nchs/blog/bullet"}],["$","meta","2",{"name":"robots","content":"index, follow"}],["$","link","3",{"rel":"canonical","href":"https://mailspo.com/emails/06c22527-e72b-4bf2-b7b8-838db5777b8c"}],["$","meta","4",{"property":"og:title","content":"Why Are So Many Americans Still Tired? by ZStack | Mailspo"}],["$","meta","5",{"property":"og:description","content":"[Zelenko Protocol ](https://zstacklife.com/)\n\n \n\nHey-\n\nA report last month from the [National Center for Health Statistics](https://www.cdc.gov/nchs/blog/bullet"}],["$","meta","6",{"property":"og:url","content":"https://mailspo.com/emails/06c22527-e72b-4bf2-b7b8-838db5777b8c"}],["$","meta","7",{"property":"og:site_name","content":"Mailspo"}],["$","meta","8",{"property":"og:image","content":"https://mailspo-ingest.imraan-243.workers.dev/img/renders/06c22527-e72b-4bf2-b7b8-838db5777b8c.jpg"}],["$","meta","9",{"property":"og:image:alt","content":"ZStack email creative: Why Are So Many Americans Still Tired?"}],["$","meta","10",{"property":"og:type","content":"article"}],["$","meta","11",{"property":"article:published_time","content":"2026-10-06T22:45:05.000Z"}],["$","meta","12",{"name":"twitter:card","content":"summary_large_image"}],["$","meta","13",{"name":"twitter:title","content":"Why Are So Many Americans Still Tired? by ZStack | Mailspo"}],["$","meta","14",{"name":"twitter:description","content":"[Zelenko Protocol ](https://zstacklife.com/)\n\n \n\nHey-\n\nA report last month from the [National Center for Health Statistics](https://www.cdc.gov/nchs/blog/bullet"}],["$","meta","15",{"name":"twitter:image","content":"https://mailspo-ingest.imraan-243.workers.dev/img/renders/06c22527-e72b-4bf2-b7b8-838db5777b8c.jpg"}],["$","meta","16",{"name":"twitter:image:alt","content":"ZStack email creative: Why Are So Many Americans Still Tired?"}],["$","link","17",{"rel":"icon","href":"/favicon.ico?favicon.3lxqohtg4uvbd.ico","sizes":"48x48","type":"image/x-icon"}],["$","$L2b","18",{}]]

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