NEW: COLLEIN'S SLEEP, YOUR EVENING RITUAL 🌙

All in one scoop

Made for women

Made in the Netherlands

Independently tested by Eurofins

All in one scoop

Made for women

Made in the Netherlands

Independently tested by Eurofins

🥄 Alles in één scoop 🌸 Gemaakt voor vrouwen 🇳🇱 Gemaakt in Nederland ✅ Onafhankelijk getest door Eurofins 🍹 Fris & lekker 🥄 Alles in één scoop 🌸 Gemaakt voor vrouwen 🇳🇱 Gemaakt in Nederland ✅ Onafhankelijk getest door Eurofins 🍹 Fris & lekker
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep
Collins Sleep

Joy, Katie, and Marieke and 15,000+ others have found their daily ritual with Colleins.

Magnesium, Glycine & Lemon Balm, Smooth Lemon

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250 mg magnesium from bisglycinate, 67% of your daily requirement

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Bisglycinate, not oxide, so gentle on your stomach

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No melatonin, no caffeine, no pills

BUNDLE AND SAVE

best deal

Your choice

1 bag

30 days

11.100 Ft

14.800 Ft

only € 1.33 /day

Most popular

Your choice

2 bags

60 days

11.100 Ft

14.800 Ft

only € 0.89 /day

+ Tote bag

Biggest saving

Your choice

3 Bags + Welcome Kit

90 days

11.100 Ft

14.800 Ft

only € 0.80 /day

+ Tote bag

+ Water bottle

Try with a discount

"Super happy with it! The taste isn't too sweet and it really has everything I needed in one drink. My mom regularly steals it from me 🤩"

Sanne

30-day money-back guarantee

🇳🇱 Shipped from the Netherlands • In stock

30-day money-back guarantee

Try it risk-free. If you're not satisfied with Colleins Sleep, you'll get your money back within 30 days. Guaranteed.

Colleins Sleep is made for the moment your day finally stops. One scoop in cold water, and you have a regular evening ritual instead of another jar in your kitchen cupboard.

Each scoop delivers 1250 mg of magnesium bisglycinate, providing 250 mg of elemental magnesium, which is 67% of the daily reference intake. Bisglycinate is magnesium bound to glycine. This form is known to be gentle on the stomach, whereas cheaper forms like magnesium oxide are often less well-tolerated.

Magnesium contributes to the normal functioning of the nervous system, normal muscle function, and normal psychological function. Additionally, magnesium contributes to the reduction of tiredness and fatigue.

We have supplemented the formula with 2500 mg of L-glycine, an amino acid naturally found in your body, and 30 mg of lemon balm extract (Melissa officinalis, 10:1). Together with the gentle lemon flavor, they make Colleins Sleep an evening moment you look forward to.

No caffeine. No melatonin. No twenty ingredients of which you can only pronounce three.

Smooth Lemon is deliberately mellower than our Pink Lemonade. Soft lemon, slightly sweet, with a creamy finish instead of a sharp sour kick. Think of lukewarm limoncello without the alcohol, or lemon water that finally has some flavor.

It's a flavor that suits the evening: not fresh and awakening, but soft and finishing. Just enough flavor to want it every day, never so sweet that it feels like a dessert.

Per 5 g scoop:

  • 2500 mg L-glycine
  • 1250 mg magnesium bisglycinate, of which 250 mg magnesium (67% RI)
  • 30 mg lemon balm extract (Melissa officinalis L., 10:1)

Ingredient declaration:

L-glycine, magnesium bisglycinate, acid (citric acid), natural flavour (lemon), lemon balm extract (Melissa officinalis L.), sweetener (sucralose).

Nutritional value per 100 g:

  • L-glycine: 50 g
  • Magnesium bisglycinate: 25 g, of which magnesium 5 g
  • Lemon balm 10:1 extract: 600 mg

Contents: 150 g, 30 daily servings.

Colleins Sleep contains no animal ingredients, no lactose and no gluten.

Colleins Sleep is produced in the Netherlands and meets the highest quality standards.

  • Halal certified: Colleins Sleep is officially Halal certified.
  • HACCP certified: Our production complies with HACCP standards for food safety.
  • Tested by Eurofins: Every batch is independently tested by Eurofins, one of the most recognised laboratories in Europe. Test reports are available upon request via support@colleins.com; please provide the batch number located on the bottom right of the back of the packaging.
  • Made in the Netherlands: Developed and produced in the Netherlands.
  • Add one scoop to 250 ml of cold water.
  • For a fuller taste, use 200 ml; for a lighter taste, use 300 ml.
  • Shake or stir until the powder is completely dissolved.
  • Use your Colleins shaker for the best mix.
  • Take Colleins Sleep in the evening, approximately 30 to 60 minutes before going to bed.
  • One scoop per day is sufficient for a consistent routine.

Food supplements are not a substitute for a varied diet and a healthy lifestyle. Do not exceed the recommended dosage. Keep out of reach of young children. Do not use during pregnancy or breastfeeding without medical advice. If you are taking medication (including sedatives) or have medical conditions, consult a doctor before use. Do not combine with alcohol. Store in a cool, dry, and dark place.

Shipping

The first batch of Sleep consists of 3,000 bags and will be shipped all at once. Due to the high volume around the launch, all orders will be dispatched between August 17 and 19. You will receive a PostNL track & trace code as soon as your package is on its way.

Free shipping from €49 in the Netherlands and Belgium. Below that, we charge €3.95.

Returns

Colleins Sleep belongs in your evening routine, not in your cupboard. Therefore, you can simply open it and try it for 30 evenings.

If after thirty days you find it's not working for you, we'll refund your money. Even if the bag is open, even if it's half empty.

Email support@colleins.com with your order number, and we'll arrange it within two business days. This is in addition to your statutory cooling-off period of fourteen days.

Not all magnesium is the same. Magnesium oxide is cheap and found in most supermarket brands, but many women find it hard on their stomachs. Colleins Sleep uses magnesium bisglycinate: magnesium bound to the amino acid glycine. This binding makes it gentle, and you get the glycine along with it.

250 mg of magnesium per scoop, 67% of your daily reference intake, in a form you can comfortably take every evening.

What our customers say

Vienna

"I'm really one of those people who puts pills aside and then forgets about them. This is one scoop in some water, tastes like lemon, and it's right next to my toothbrush, so I actually do it."

Inge

"I woke up every morning feeling like I hadn't slept and dragged myself through the day. After three weeks, I notice that I no longer crash in the afternoons."

Marieke

"It always took me a very long time to fall asleep in the evening, and now I have something to look forward to at half past ten at night, which is exactly the push I needed."

What's in each scoop?

Magnesium bisglycinate, L-glycine and lemon balm, with natural lemon flavour for a smooth Lemon Smooth taste. This content has been independently verified by Eurofins.

1250 mg magnesium bisglycinate

Good for 250 mg elemental magnesium, 67% of the daily reference intake. Magnesium contributes to the normal functioning of the nervous system and normal muscle function.* Bisglycinate is the form known for being gentle on the stomach.

2500 mg L-glycine

An amino acid naturally occurring in your body and a building block of collagen. In Colleins Sleep, glycine also provides the soft, slightly sweet base of the flavor.

30 mg lemon balm extract

Melissa officinalis, in a concentrated 10:1 extract. Part of the evening ritual for centuries, here in powder form instead of a cup of tea.

*Claims in accordance with EU Regulation 432/2012

Colleins Sleep vs. Traditional Supplements

Colleins Sleep

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Magnesium in bisglycinate form

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250 mg magnesium per scoop

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Smooth Lemon flavour

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No caffeine or melatonin

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Made Dutch

Traditional

X Cheap magnesium oxide

X Underdosing per tablet

X Tablets that you swallow

X Unclear additions

X Unclear origin

Some of our customers' stories

What Colleins Sleep does for you

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For your nervous system

Magnesium contributes to the normal functioning of the nervous system and to normal psychological function. It is a mineral that your body needs every day, and which many women do not fully obtain through diet alone.

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For your muscles

Magnesium contributes to normal muscle function. Whether you train four times a week or mostly walk a lot, your muscles use magnesium continuously. 250 mg per scoop covers 67% of your daily reference intake.

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For your energy

Magnesium helps reduce fatigue and tiredness, and contributes to normal energy-yielding metabolism. Not as a stimulant, but as a foundation for the rest of your day.

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For your evening ritual

One scoop, 250 ml cold water, done. No counting jars, no swallowing pills. A small moment that signals: the day is complete.

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1 scoop in the evening = the end of your day

Colleins Sleep is not a complicated stack. You mix one scoop in cold water, stir or shake, and you're done. The Smooth Lemon flavor is mild and not too sweet, exactly what you want when you no longer want to be jolted awake.

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30-Day Satisfaction Guarantee

If after 30 days of consistent use you feel it's not working for you, we'll find a solution together, or you'll get your money back.

How to use Colleins Sleep

Add one scoop to 200-300 ml of cold water.

Do you prefer a fuller, more pronounced flavor? Then use 200 ml. Prefer something a bit more subtle? Go for 300 ml. You decide what tastes best.

Shake or stir until the powder is completely dissolved.

Use your Colleins mug for the best mix. This is how you make it your regular evening ritual in just a few seconds.

Take it 30 to 60 minutes before you go to bed.

Many women take Collein's Sleep while cleaning the kitchen or doing their evening routine. Choose the time that is easiest for you to stick to.

What our customers say

Sanne Willemsen

I've been taking the product a few weeks now before bed, and I like it

Ellen

"Great taste and nice that it's all in one! I work out a lot and have tried many different supplement combinations. The fact that everything you need is in one scoop works very well for me."

Daantje

I often work out in the evening before going to sleep.

I always have this pouch with me at the gym, so I can take it after my workout and sleep well.

Sophie Smets

"Great taste and dissolves well in water, highly recommended!"

Marion

This is truly a beautiful addition to Colleen's product that I already had. Since this is nice for the evening and the other one helps me start my day well

Demi

It mixes very easily and the taste is super delicious, especially in the evening, when I often find other supplements unpalatable and pills unpleasant to swallow.

This is a good replacement solution

Esther

As a mother, I have a busy schedule, and this helps me feel better and more energetic from day to day. A good upgrade to my daily routine

Inge de Zwart

"Delivery was super fast and the product fully meets my expectations. The taste is good, texture is pleasant, and it's easy to drink."

Judicael

Very simply put, it helps me sleep better, and it's also delicious

Camilla Bruins

I have now tested it for a week and notice a big difference

Danisa

The taste is really delicious.

I used to take magnesium in pill form now and then. But this powder with this taste just makes it even better, and the other ingredients in it also seem to have a good effect.

Everything you want to know about Collein's Sleep

Pink Lemonade is your morning scoop with collagen, creatine, and vitamin C. Sleep is your evening scoop with magnesium, glycine, and lemon balm. They complement each other and you can easily use both on the same day: Pink Lemonade in the morning, Sleep in the evening.

Bisglycinate is magnesium bound to the amino acid glycine. This form is known to be gentle on the stomach, whereas cheaper forms like magnesium oxide are less well tolerated by many people. Additionally, you get the benefit of the glycine directly.

Per 5-gram scoop, you get 1250 mg of magnesium bisglycinate, which translates to 250 mg of elemental magnesium. This is 67% of the daily reference intake. Note the difference: many brands only state the weight of the magnesium compound, not the actual magnesium content.

No. Colleins Sleep does not contain melatonin, caffeine, or any other stimulating or sleep-inducing substances. It is a dietary supplement with magnesium, glycine, and lemon balm.

The name says Night, but magnesium works at any time of the day. We recommend the evening because it makes it easiest to become a fixed ritual, and because the mild lemon flavor fits best then. Take it whenever you can stick to it.

No. The formulas do not overlap: Pink Lemonade contains collagen, creatine, and vitamin C, Night contains magnesium, glycine, and lemon balm. Many women use Pink Lemonade in the morning and Night in the evening.

Soft lemon, lightly sweet, with a creamy finish instead of a sharp sour kick. Deliberately milder than our Pink Lemonade. Tip: use 300 ml of water for a lighter taste, or 200 ml for a fuller one.

Colleins Sleep contains no animal ingredients, making it suitable for vegetarians and vegans. It is also lactose-free and gluten-free.

That depends heavily on the form. Bisglycinate was specifically chosen because it is known to be gentle on the stomach. Do stick to one scoop per day and do not exceed the recommended dosage.

Do not use during pregnancy or breastfeeding without medical advice. Always consult your doctor or midwife first.

Are you taking medication, including sedatives, or do you have a medical condition? Please consult your doctor before starting. Do not combine Colleins Sleep with alcohol.

One pouch contains 150 grams, enough for 30 daily servings of 5 grams. So, at one scoop per day, one pouch will last you exactly one month.

Yes, when used according to the recommended dosage of one scoop per day. Colleins Sleep is produced in the Netherlands under strict European quality standards (GMP & HACCP).

For all other questions, please send an email to support@colleins.com, we are happy to help you!