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For falling asleep faster
L-Glycine · An amino acid (glycine) involved in collagen synthesis and thermoregulation
The amino acid that helps your body “cool down” for sleep and drift off more easily.
Helps with
In plain language
Glycine is the simplest amino acid, one of the building blocks of collagen.
It is also involved in thermoregulation, how the body manages its internal temperature.
It acts gently on the nervous system in the evening, without forcing you to sleep.
Natural source:
Glycine is an amino acid your body makes on its own, also found in gelatin, bone broth, meat and fish. A noticeable evening effect needs a concentrated dose, which is why we include a clean 2000 mg in the sachet.
Why l-glycine is in Corti-Glow
To fall asleep, your core temperature has to drop by about 1°C. Glycine supports exactly that.
In Kawai (2007), taking glycine before bed improved sleep quality and reduced next-day fatigue.
It works in synergy with the other evening ingredients in the sachet, a calm mind + a cooled body.
How it works on the body
Widens the peripheral vessels
Glycine gently dilates the blood vessels in the skin of the hands and feet. The body releases heat outward through them.
Lowers core temperature
To fall asleep, the body's core has to cool by about 1°C. This heat release makes the transition to sleep more natural and faster.
Calms the nervous system
Glycine acts gently on the brain in the evening, less tension at bedtime, without a “drugged” feeling.
Supports a steadier rhythm
An easier drift-off in the evening also means less fatigue and a clearer head the next morning.
What to expect
The first evening · L-Glycine
An easier “switch-off”. A sense that the body relaxes faster.
The first evening
An easier “switch-off”. A sense that the body relaxes faster.
The first week
You fall asleep faster. Less tossing in bed.
2–3 weeks
Less morning fatigue. A steadier evening rhythm.
How it works with the other ingredients
Not just 7 supplements in one box. Every combination has a specific mechanism, here's why the formula is what it is.
Combination
+ Magnesium Bisglycinate · 670 mg
For sleep and muscle relaxation
Mechanism
Magnesium bisglycinate is actually magnesium bound to two glycine molecules, the same amino acid. So the two ingredients literally work from the same material: magnesium relaxes the muscles, while glycine helps the body release heat and cool down for sleep.
End benefit
A relaxed body (magnesium) + falling asleep faster (glycine). A smoother transition into sleep.
2 combinations · click to explore
This is why they aren't sold separately, one sachet, the full chain.
The research
Kawai et al. (2007)
Sleep and Biological Rhythms
Participants
Healthy volunteers with mild sleep complaints
Dosage
3 g glycine before bed
Result: Improved sleep quality and less next-day fatigue. Shorter time to fall asleep, measured objectively.
Inagawa et al. (2006)
Sleep and Biological Rhythms
Participants
19 healthy volunteers
Dosage
3 g glycine before bed
Result: Subjectively better sleep quality and less daytime fatigue after the nights with glycine.
Why this exact dose in Corti-Glow
See how our dose compares with what was used in clinical trials.
Corti-Glow, our dose
our dose, 2000 mg
2000 mg
Kawai 2007
3 g glycine before bed
3 mg
Inagawa 2006
3 g glycine before bed
3 mg
Frequently asked questions
Works well with
For sleep and muscle relaxation
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See detailsOne sachet, 30 evenings. The list hears first and gets the early price.
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