Les liens entre mélatonine et sommeil
Dès que l'on présente des difficultés d'endormissement, les médecins et pharmaciens proposent une supplémentation en mélatonine. Qu'est-ce que la mélatonine ou N-acétyl-5-méthoxytryptamine ?
La mélatonine est la fameuse hormone du sommeil. Zoom sur cette molécule naturelle qui rythme votre cycle veille/sommeil.
Melatonin, an essential hormone for finding sleep
The melatoninis an essential neuro-hormone in your circadian cycle. It is thanks to this molecule discovered in 1958 by Aaron B. Lerner at Yale University (USA) that your biological clock knows when the sandman should come by...
Comment la mélatonine agit-elle ?
Dès que la lumière du jour commence à décroître, la glande pinéale ou épiphyse qui se trouve au cœur de votre cerveau se met à sécréter la mélatonine. Cela a pour but de préparer votre corps ausommeil : les fonctions organiques commencent à ralentir, la température corporelle à s'abaisser...
Its peak secretion is in the middle of the night between 2 and 4 am. Why is it that as soon as the light dims, the pineal gland reacts? Because the optic nerves are directly connected to it. This is the reason why people with blindness often have difficulty falling asleep...
What blocks melatonin production?
Important fact: melatonin is not stored. It is produced as soon as night falls by thepineal gland from an amino acid, tryptophan (also a precursor of serotonin). la sérotonine).
1. Natural and artificial light
Indeed, the photoreceptor cells of the retina (melanopsin ganglion cells) are sensitive to blue light.
Whether it comes from urban lighting, television screens, computer screens, smartphones, tablets or game consoles. This light is imbued with a bluish radiation, invisible to the naked eye, but which completely short-circuits the production of melatonin. This explains why spending the evening in front of a screen is effectively inadvisable for people with insomnia or who have difficulty falling asleep.
As discussed in the article on the circadian cycle A few years ago, it was thought that you had to reach 1000 lux to disrupt the biological clock whereas 10 lux is enough to stop the secretion of melatonin. 10 lux corresponds to the light of a candle!.
2. Excitants
Alcohol and tobacco are excitants that interfere with the proper synthesis of melatonin by the pineal gland.
3. Certain medications
Some medications such as anxiolytics, aspirin, ibuprofen, some beta-blockers, non-steroidal anti-inflammatory drugs, calcium antagonists interfere with the proper production of melatonin.
4. Electromagnetic fields
Electromagnetic fields would have an impact on the functioning of the pineal gland. Thus, antenna-relay, cell phone near the bed, electrical devices (alarm clock) would affect its functioning.
When to supplement with melatonin?
Vous pouvez envisager une supplémentation en mélatonine pour améliorer votre endormissement et votre sommeil dès lors que vous vous sentez concerné par une de ces situations :
- You are slow to fall asleep.
- Your night is not restful and you doze off during the day.
- You work in a profession with staggered hours and yourcircadian rhythm is disturbed.
- Having trouble recovering from jet lag after traveling or changing time?
Il est important de souligner que se supplémenter en mélatonine n'entrave en rien à la production naturelle par la glande pinéale. Il n'y a donc pas d'effet d’accoutumance ni de sensation « vaseuse » au réveil, contrairement aux somnifères.
The recommended dose is 1 mg per day to be taken 30 minutes before bedtime.
Supplementing should be considered a short-term solution. If you have been suffering from insomnia for years, perhaps it would be interesting to do some global work to understand the origin of your sleep disorders: depression, emotional mismanagement, anxiety, waking up at night, poor lifestyle, addiction to screens etc...
La mélatonine est une hormone indispensable au bon déroulé du cycle veille/ sommeil. De nos jours, cette molécule remplace de plus en plus les somnifères. Elle est tout aussi efficace, naturelle et sans accoutumance ni effets secondaires.
Si vous vous sentez concerné, consultez votre médecin qui saura vous orienter car lui seul peut déterminer s'il n'y a pas de causes sous-jacentes à vos problèmes de sommeil. Ensuite, si une approche holistique de la santé au naturel vous intéresse, un naturopathe pourra vous conseiller et vous accompagner.