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Z4 Sleep: The Same Legendary Formula as Biotest’s Z12, Now Back!



For those who have been hunting for a reliable sleep supplement, Biotest’s Z12 was likely on your radar. Z12 became a favorite among people looking for deep, restful sleep.


However, when Biotest discontinued Z12, it left many without the trusted sleep aid they had come to rely on.


The good news? Thrive Supplements Z4 Sleep brings back the exact same formula as Biotest’s Z12, delivering all the benefits you loved—now under the Z4 name.


Why Was Z12 So Popular?


Z12 stood out because it provided real results without the side effects typical of many sleep aids. Unlike medications that can leave you groggy or dependent, Z12’s formula relied on natural, non-habit-forming ingredients that promoted quality sleep while allowing you to wake up refreshed and ready for the day.


Z12’s power came from three key ingredients:


  • PhGABA (Phenyl-GABA): A more bioavailable form of GABA, PhGABA helps to calm your mind and relax your nervous system, making it easier to drift off to sleep. It effectively reduces the overactivity in your brain, ensuring a more peaceful transition into restful sleep.


  • 5-HTP (5-Hydroxytryptophan): A precursor to serotonin, 5-HTP plays a crucial role in regulating mood and sleep. By increasing serotonin levels, 5-HTP not only supports relaxation but also aids in maintaining stable sleep patterns throughout the night.


  • L-Theanine: Commonly found in green tea, L-Theanine is renowned for its ability to promote relaxation without drowsiness. It helps reduce stress and anxiety, creating the perfect mental environment for sleep.


These ingredients worked together in perfect harmony, making Z12 one of the most effective sleep supplements around. But when Z12 was discontinued, many were left without a comparable solution—until now.


Introducing Z4 Sleep: The Same Proven Formula


At Thrive Supplements, we recognized the demand for a high-quality sleep aid and wanted to bring back what people loved about Z12. That’s why we launched Z4 Sleep with the exact same blend of PhGABA, 5-HTP, and L-Theanine, ensuring the same powerful sleep support that Z12 offered.


Z4 isn’t just another sleep aid on the market. It’s the trusted Z12 formula reborn, offering everything you need for deep, restorative sleep. If you’ve been looking for a solution to help you sleep better without side effects, Z4 is the answer.


What Z4 Can Do for You:


  1. Helps You Fall Asleep Faster: Z4 promotes relaxation, helping you transition into sleep more easily by calming your mind and body.

  2. Supports Deeper, More Restful Sleep: It’s not just about falling asleep—it’s about staying asleep and experiencing those crucial deep sleep cycles. Z4 helps ensure you get uninterrupted, quality sleep.

  3. Non-Habit Forming: Unlike prescription sleep aids, Z4 doesn’t leave you dependent. It works naturally with your body’s systems to support sleep, so you wake up refreshed.

  4. Wake Up Refreshed, Not Groggy: One of the biggest advantages of Z4’s formula is how you’ll feel in the morning. No more grogginess or sluggishness—just a clean, refreshed feeling that sets you up for a productive day.

  5. Supports Mood and Stress Relief: Thanks to the inclusion of 5-HTP and L-Theanine, Z4 also helps support a balanced mood and reduces stress, making it easier to unwind at the end of a long day.


Who Should Try Z4?


  • Anyone Struggling with Sleep: If you have trouble falling asleep or staying asleep, Z4 can provide the support you need for more consistent, restful nights.


  • Athletes and Fitness Enthusiasts: Quality sleep is essential for recovery. Z4 helps ensure you get the deep sleep needed to repair muscles and recharge for your next workout.


  • People with Busy, Stressful Lifestyles: If stress or an overactive mind is keeping you awake at night, Z4’s calming blend can help you relax and drift off.


Why Choose Z4 Over Other Sleep Supplements?


While there are countless sleep aids on the market, very few are as well-balanced or as effective as Z4. With a formula that’s been trusted for years as Biotest’s Z12, Z4 offers:


  • A Proven, Natural Approach: Z4’s non-habit-forming ingredients work with your body, not against it.


  • No Morning Grogginess: Wake up feeling refreshed and ready to take on the day.


  • A Formula You Can Trust: Z4 uses the same powerful ingredients that made Z12 a customer favorite, now under the Thrive Supplements.


Ready to Sleep Better?


Biotest may have discontinued Z12, but Thrive Supplements Z4 Sleep is here to take its place. Whether you were a long-time fan of Z12 or are just looking for a reliable, effective sleep aid, Z4 offers you the same trusted solution.


Don’t let restless nights hold you back—try Z4 today and experience the benefits of deep, rejuvenating sleep. Your body and mind will thank you.


Z4 Sleep is available now through Thrive Supplements. Get the same sleep-enhancing formula that made Z12 famous, now ready to help you get the restful sleep you deserve. 🌙


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