Nutrients for Better Sleep: What Really Matters

Big promises circulate around magnesium, melatonin, B vitamins and herbs like valerian for the perfect night. Fact is: magnesium, vitamin B6 and melatonin have genuinely tested, EU-approved functions for the nervous system, mental function and time to fall asleep – tryptophan, glycine and plant classics like valerian work through their established role in metabolism and in the evening routine. This guide shows you concisely what's behind each individual nutrient and how to use them sensibly for your evening.

The Key Facts at a Glance

• Magnesium contributes to normal muscle function, normal function of the nervous system, normal psychological function, and to the reduction of tiredness and fatigue.
• Vitamin B6 contributes to normal function of the nervous system and normal psychological function.
• Melatonin contributes to a reduction in the time taken to fall asleep – the effect kicks in from 1 mg shortly before bedtime.
• L-tryptophan is the precursor of serotonin and melatonin, and via a second pathway, of vitamin B3.
• Glycine is a simple amino acid and also an inhibitory messenger in the nervous system – which is why it's often used in the evening.
• Valerian, lemon balm, hops and passionflower have long been part of the traditional evening routine.
• The foundation remains your everyday habits: a fixed rhythm, dimmed light in the evening, and a cool, dark bedroom reinforce every nutrient's effect.

Magnesium: Support for Nerves, Mind and Energy

Magnesium is the classic among evening nutrients – and rightly so: magnesium contributes to normal muscle function, to normal function of the nervous system, to normal psychological function, and to the reduction of tiredness and fatigue. All four functions are closely tied to tension, recovery and winding down after a long day.

You'll find magnesium in whole grains, nuts, legumes and leafy greens. Increased needs mainly affect people with a heavy sports schedule or particular life circumstances. You can read more about the mineral's role in detail in our guide on magnesium and the nervous system. Your body absorbs what it needs and excretes any excess – if you're unsure about your needs, a doctor's check is still worthwhile rather than dosing high on a hunch.

Melatonin: The Signal for the Night

Your body makes melatonin mainly in darkness – it's the natural pacemaker for your sleep-wake rhythm. Melatonin contributes to a reduction in the time taken to fall asleep. You achieve this effect by taking at least 1 mg shortly before going to bed.

Melatonin thus acts specifically on the falling-asleep phase – not on the whole course of sleep. It's especially sought after for jet lag and unfamiliar daily rhythms. You'll find a more detailed assessment in our article on melatonin and time to fall asleep.

Timing plays a bigger role here than with most other nutrients: because your body produces melatonin itself in darkness, bright light in the late evening – for instance from screens – works against this signal. If you dim the lights in the evening, you support the natural rhythm in addition to taking it.

Vitamin B6: Contribution to the Nervous System and Mental Function

B vitamins are involved in numerous metabolic pathways, including those of the nervous system and messengers. Vitamin B6 contributes to normal function of the nervous system and to normal psychological function. It's also involved in amino acid metabolism and is found in fish, meat, whole grains, potatoes and many vegetables.

That's why B6 is often offered in combination products together with magnesium: the two functions around the nervous system and mental function complement each other as a well-matched duo for the evening.

L-Tryptophan: Precursor of Serotonin and Melatonin

L-tryptophan is an essential amino acid – your body can't make it itself, you take it in through food. In metabolism, tryptophan is the precursor of serotonin, which your body further processes into melatonin in the pineal gland. Via a second metabolic pathway, tryptophan is also the precursor of vitamin B3. Rich sources of tryptophan include dairy products, eggs, nuts, legumes and poultry.

As part of a balanced, protein-containing diet, tryptophan lands on your plate regularly anyway. As a supplement, the amino acid is available isolated or embedded in a mix of all essential amino acids.

Glycine: The Simplest Amino Acid

Glycine is the smallest and simplest of the protein-forming amino acids – non-essential, so your body makes it itself, and you also take it in via protein-rich foods like meat, fish and gelatine. Besides its role as a metabolic building block, glycine is also an inhibitory messenger in the central nervous system – this dual role is exactly what makes it a sought-after ingredient in evening products.

Valerian, Lemon Balm & Co.: Plant Classics for the Evening

Valerian has been one of the best-known plants for the evening calming routine for centuries, often alongside lemon balm, hops or passionflower. You'll find them as tea or in combination products – fixed parts of many evening rituals.

How strongly a herbal extract is perceived varies from person to person. For many, the value lies just as much in the ritual itself: a warm cup of tea, dimmed light, and a deliberate transition into the night round off the day pleasantly – regardless of which plant is in the cup.

Intake & Dosage

With melatonin, the dose is clearly regulated: the approved effect on time to fall asleep kicks in from 1 mg, taken shortly before bedtime. With magnesium, vitamin B6, tryptophan and glycine, what matters above all is an adequate baseline supply – most people with a balanced diet already cover their needs through food.

Supplementing is worthwhile mainly with a demonstrated deficiency or increased need, for instance with an unbalanced diet, certain life phases, or intense sport. Stick to the recommended dosage on the packaging, note the upper limits for individual nutrients, and don't combine several products indiscriminately. Nutrients are most effective anyway in combination with a fixed evening routine: dimmed light, a cool room, and a regular rhythm.

Honestly Assessed

Magnesium, vitamin B6 and melatonin stand on particularly solid ground: for all three, there are clearly approved, EU-tested functions around the nervous system, mental function, tiredness and time to fall asleep. Tryptophan, glycine and herbs like valerian, lemon balm, hops and passionflower have no approved health claim of their own – that doesn't diminish their real role in metabolism or their long tradition of use, but it is a difference we won't hide from you.

Important: if sleep problems persist over a longer period, come with daytime tiredness, or burden your everyday life, they belong in a doctor's hands. There can be underlying causes that need professional diagnosis and support. Food supplements are no substitute for medical advice in such situations.

Matching Products from Scheunengut

Our Melatonin Sleep Complex delivers 1 mg of melatonin per tablet in a highly bioavailable form, combined with magnesium – for time to fall asleep and normal function of the nervous system and mental function in one product. If you'd rather rely on plant classics, our complex with St. John's wort, valerian, passionflower, folic acid and vitamin B12 offers a well-thought-out combination for the evening calming routine.

Frequently Asked Questions (FAQ)

Which Nutrients Matter Most for Good Sleep?

Best documented are magnesium, vitamin B6 and melatonin. Magnesium contributes to normal muscle function, normal function of the nervous system, normal psychological function, and to reducing tiredness and fatigue; vitamin B6 to normal function of the nervous system and normal psychological function. Melatonin contributes to a reduction in time to fall asleep. Tryptophan, glycine and herbs like valerian complement this through their role in metabolism and the evening routine.

How Much Melatonin Do I Need for It to Work?

The approved effect kicks in from at least 1 mg, taken shortly before bedtime. Melatonin acts specifically on time to fall asleep – it's a signal for the transition into the night, not a remedy for the whole course of sleep.

What Does L-Tryptophan Do in the Body?

L-tryptophan is an essential amino acid you have to take in through food. It's the precursor of serotonin, which your body further processes into melatonin, and via a second metabolic pathway, also the precursor of vitamin B3. You'll find it richly in dairy products, eggs, nuts, legumes and poultry.

What Is Glycine Used for in the Evening?

Glycine is the simplest amino acid and also an inhibitory messenger in the central nervous system. This dual role is exactly what makes it a popular ingredient in evening products. Your body partly makes glycine itself and also takes it in via protein-rich foods like meat, fish and gelatine.

Do Valerian, Lemon Balm, Hops or Passionflower Help With Falling Asleep?

These plants have long been part of the traditional evening calming routine and are mostly used as tea or in combination products. How strongly a herbal extract is perceived varies from person to person – for many, the value lies just as much in the ritual as in the plant itself.

Can I Take Magnesium and Melatonin Together?

Yes, that's one of the most common evening combinations. Magnesium contributes to normal function of the nervous system and mental function, melatonin reduces time to fall asleep – the two functions complement each other well. Stick to the recommended dosage on the packaging.

When Should I See a Doctor About Sleep Problems?

If sleep problems persist over a longer period, come with pronounced daytime tiredness, or burden your everyday life, they belong in a doctor's hands. There can be underlying causes that require professional diagnosis and support. Food supplements are no substitute for medical advice in that case.