The science behind deep, restful sleep

SLEEP QUALITY BASICS

Good sleep depends not only on duration – depth, regularity and quality also play a key role.

Most people know that we need 7 to 9 hours of sleep. But quality is at least as important as quantity.

During the night, your brain goes through several sleep stages – light sleep, deep sleep (also known as slow-wave sleep), and REM sleep, in which most dreams occur. These stages repeat approximately every 90 minutes and each fulfills its own important function for the regeneration of body and mind.

• Light sleepIt helps the body to relax and stabilize sleep – in preparation for deeper, more restorative sleep phases.
• Deep sleepThis is the phase in which the body repairs muscle tissue, restores energy, and strengthens the immune system.
• REM sleepIt supports memory formation, emotional processing, and mental performance.

However, our sleep architecture changes with age.

Older people spend more time in light sleep phases, while deep and REM sleep decrease. Sleep becomes more fragmented and less restorative – even with sufficient sleep duration.

In addition, thecircadian rhythmunstable. Many experience a phase shift – they get tired earlier and wake up earlier, often before their sleep has been truly restful. Hormonal changes, especially during perimenopause and menopause, further contribute to the disruption.

These changes not only affect how rested you feel – they also have a long-term impact on your health.

Deep, undisturbed sleep is closely linked to healthy aging and longevity. It influences the resilience of the immune system, hormonal balance, metabolism – and even how efficiently the brain eliminates waste products via the lymphatic system.

When sleep is too light or irregular, the body's ability to regulate, repair, and regenerate itself decreases.

Fall asleep faster

This synergistic blend of green tea extract, saffron, and holy basil has a calming effect on body and mind. L-theanine from green tea extract promotes a calm, clear state of mind and reduces mental tension. Holixer® (from holy basil) lowers cortisol levels, making it easier to fall asleep¹. Safr'Inside™ has been shown to improve sleep quality and reduce feelings of stress².

Stable day-night rhythm

Holixer® regulates cortisol levels, Safr'Inside™ improves sleep quality and reduces stress – together they promote the circadian rhythm and the body's own melatonin production. Magnesium and vitamin B6 support GABA activity and enable natural sleep and wake-up – all without added melatonin.

Wake up refreshed

Unlike sedatives, Sereniser promotes restorative sleep without causing morning grogginess. Clinical studies show that Serezin™ can improve both sleep quality and morning alertness³ – so you wake up refreshed, rested, and ready for the day without feeling groggy.

Deeper sleep

The Sereniser combines Serezin™, magnesium glycinate, vitamin B6, and Safr'Inside™ to support all sleep stages. Serezin™ relieves nighttime discomfort, magnesium glycinate relaxes muscles and the nervous system, while vitamin B6 and Safr'Inside™ promote the body's natural melatonin production – for deeper, more restful sleep.

Made in Switzerland

Formulated by experts

Sustainable packaging

Clinically proven effect

Vegan

Halal

Active ingredients:

Green tea extract 333 mg, of which L-theanine 200 mg, blend of frankincense and ginger extract (Serezin™) 300 mg, Indian basil extract (Holixer™) 250 mg, magnesium (from magnesium bisglycinate) 56.25 mg, saffron extract (Safr'Inside™) 30 mg, vitamin B6 (pyridoxal-5-phosphate) 1.4 mg

Other ingredients:

• Microcrystalline cellulose is used as a filler to ensure the capsule is completely filled (active ingredients alone do not fill the capsule completely), thus supporting consistent manufacturing and dosing.
• Magnesium salts of fatty acids are used as an anti-caking agent to ensure that the powder can flow freely (important for manufacturing) and to achieve a uniform mixture of the ingredients in the capsule (ensuring proper dosage).
• Hydroxypropylmethylcellulose (HPMC) as a coating agent in the form of a plant-based capsule shell

Take 2 capsules with water about 1-2 hours before bedtime. If you are sensitive to supplements, you can start with 1 capsule and gradually increase the amount.