😴 Insomnia and Frequent Night Waking: Magnesium Deficiency, Glycine and Melatonin Synthesis
Why it is hard to fall asleep and you wake at night — and what role nutrients play
Insomnia is one of the most common complaints of modern life. It is not just "I cannot fall asleep" but also frequent night waking, early rising and light sleep. Sleep quality affects mood, immunity, weight and overall well-being.
There are many causes: stress, light and screens, caffeine, routine. But nutrition also plays a significant role: magnesium, glycine and melatonin precursors directly participate in the process of falling asleep. Let's look at what science says and what can be done.
What is insomnia and why it occurs
Insomnia is difficulty falling asleep, staying asleep, or early waking that affects daytime well-being. It can be short-term or chronic.
| Form | Manifestation | Common cause |
|---|---|---|
| Trouble falling asleep | Takes a long time to fall asleep | Stress, anxiety, caffeine |
| Frequent waking | Wake several times at night | Light sleep, deficiencies, stress |
| Early rising | Wake too early | Circadian rhythm disruption |
Melatonin and the sleep cycle
Melatonin is the "sleep hormone" that regulates circadian rhythms. It is produced in the brain (pineal gland) in the evening and at night, signaling the onset of darkness. With age and rhythm disruption, its production can decline.
Magnesium: the relaxation mineral
Magnesium participates in hundreds of body reactions, including the nervous system and muscles. It supports relaxation and healthy sleep. Magnesium deficiency is linked to trouble falling asleep and light sleep.
| Food | Magnesium content |
|---|---|
| Pumpkin seeds | ~262 mg/100 g |
| Almonds | ~270 mg/100 g |
| Spinach | ~79 mg/100 g |
| Dark chocolate | ~200 mg/100 g |
| Legumes | ~40–60 mg/100 g |
Glycine: the calm amino acid
Glycine is an amino acid that acts as an inhibitory neurotransmitter in the central nervous system. It can promote relaxation and improve sleep quality. Glycine is also found in collagen and protein foods.
Tryptophan, serotonin and melatonin
Melatonin is synthesized from tryptophan — an amino acid the body gets from food. The chain is: tryptophan → serotonin → melatonin. So adequate tryptophan intake matters for normal synthesis of the "sleep hormone".
| Food | Tryptophan content |
|---|---|
| Turkey | ~250–300 mg/100 g |
| Eggs | ~170 mg/100 g |
| Pumpkin seeds | ~580 mg/100 g |
| Cheese | ~300–400 mg/100 g |
| Oats | ~130 mg/100 g |
Foods and norms for good sleep
Balanced nutrition supports the nervous system and the sleep cycle. Approximate norms:
| Nutrient | Norm/day | Role |
|---|---|---|
| Magnesium | ~400 mg (men), ~310–360 mg (women) | Nervous system relaxation |
| Tryptophan | From protein foods | Melatonin precursor |
| Glycine | From protein foods | Inhibitory neurotransmitter |
Practical steps
How to improve sleep comprehensively.
Routine
Go to bed and wake at the same time, even on weekends. A stable rhythm is the foundation of healthy sleep.
Light and screens
Reduce bright light and screens 1–2 hours before bed. This helps melatonin production.
Nutrition
A complete diet with magnesium, tryptophan and glycine. Do not overeat before bed.
Caffeine and alcohol
Caffeine in the evening interferes with sleep. Alcohol impairs its quality, although it helps fall asleep.
Supplements as prescribed
Magnesium or glycine — only after consultation and with a confirmed need, not "just in case".
Does magnesium help with insomnia?
With a magnesium deficiency, replenishing it can improve relaxation and sleep. Without a deficiency, the effect is not guaranteed.
What is melatonin?
A hormone that regulates circadian rhythms and preparation for sleep. It is synthesized from tryptophan through serotonin.
How does tryptophan affect sleep?
From it the body synthesizes serotonin and melatonin, so it is important for normal sleep.
Why is glycine needed for sleep?
Glycine is an inhibitory neurotransmitter that promotes relaxation. Some studies link it to better falling asleep.
Which foods help you sleep?
Nuts, seeds, spinach (magnesium), turkey, cheese, eggs (tryptophan), warm milk or oats.
Should I take melatonin?
Melatonin helps with rhythm disruption (jet lag, shift work), but chronic insomnia needs a comprehensive approach and a doctor's prescription.
Why do I wake up at night?
Frequent waking is linked to stress, caffeine, alcohol, light sleep or deficiencies. A comprehensive approach matters.
Does a phone screen affect sleep?
Yes, blue light from screens in the evening suppresses melatonin and impairs falling asleep.
How much magnesium is needed?
About 400 mg for men and 310–360 mg for women per day. The supplement dose is set by a doctor.
When to see a doctor for insomnia?
If insomnia lasts more than a month, affects your life or comes with anxiety and depression — definitely see a doctor.