You've done everything right. The bedtime routine is consistent. The room is dark and cool. You've cut the screens. And yet — your toddler is still up at 11pm, and you're lying awake next to your partner wondering if this is just... life now.
Sometimes the answer isn't a new sleep training method. Sometimes it's a mineral. Specifically, magnesium — one of the most essential nutrients in the human body and, according to researchers, one of the most widely underconsumed. Here's what the science actually says, and what that means for your family's sleep.
TL;DR: Research suggests over half of Americans don't meet the recommended daily intake for magnesium. This matters because magnesium plays a direct role in regulating the GABA and NMDA systems — the nervous system pathways responsible for calm and sleep. Transdermal magnesium (applied to the skin) is an emerging alternative to oral supplements, with pilot studies showing measurable increases in serum magnesium levels after topical use. Kindred Naturals' Magnesium Lotion, "The Nightly Reset," is formulated for both babies and moms as part of a calming bedtime ritual.
Why Is Magnesium So Important for Sleep?
Magnesium is involved in over 300 enzymatic processes in the body — but its role in sleep is particularly well-documented. According to a 2025 review published in NIH's PMC, magnesium regulates sleep primarily through two mechanisms:
- GABA activation: Magnesium acts as a GABA agonist — meaning it helps activate GABA receptors, the primary inhibitory neurotransmitters in the brain that promote calm and prepare the body for sleep.
- NMDA receptor blocking: Magnesium also acts as a natural NMDA antagonist, reducing nervous system excitability. When magnesium levels are low, NMDA receptors stay activated longer, contributing to that wired-but-tired feeling that keeps so many of us (and our kids) from settling down.
The same review found that magnesium deficiency doesn't just affect how quickly you fall asleep — it also shortens effective sleep duration and impairs sleep quality overall.
How Common Is Magnesium Deficiency — Really?
More common than most people realize. A widely cited analysis published in Open Heart found that approximately 50% of Americans consume less magnesium than the Estimated Average Requirement — and that's using self-reported dietary intake data, which tends to overestimate actual consumption.
The causes are structural: modern agricultural practices have depleted soil magnesium levels, meaning even "healthy" vegetables contain less of it than they did decades ago. Add in the magnesium-depleting effects of chronic stress, certain medications, and processed food diets, and you have a population that is quietly, chronically running low on one of its most critical minerals.
For moms specifically, pregnancy and breastfeeding increase magnesium demands significantly — making postpartum depletion a real and underaddressed issue.
Does Magnesium Actually Absorb Through the Skin?
This is the question we get most often about our Magnesium Lotion, and it deserves an honest answer.
The science here is still developing, and we won't pretend otherwise. The skin's primary job is to keep things out — and the stratum corneum (the outermost layer) is a formidable barrier. That said, research suggests transdermal absorption is real, if variable.
- A PLOS ONE pilot study with 25 participants found a clinically relevant increase in serum magnesium levels after two weeks of topical magnesium cream use.
- A study published in Skin Pharmacology and Physiology found that magnesium ions penetrate the stratum corneum in a concentration- and time-dependent manner, with absorption significantly facilitated by hair follicles.
- A review in Nutrients concluded that while the evidence for transdermal magnesium remains preliminary, the mechanism is plausible and warrants further study.
Our position: transdermal magnesium is not a replacement for a magnesium-rich diet, and we don't claim it is. What it offers is a gentle, low-friction way to support magnesium levels as part of a consistent routine — particularly useful for babies and toddlers who can't take supplements, and for moms who want something that's both functional and calming.
What Does a Magnesium Bedtime Ritual Actually Look Like?
The ritual matters as much as the mineral. The act of slowing down, applying lotion, and doing something intentional before bed signals to the nervous system that it's time to wind down — independent of any magnesium absorption. Combined, the sensory and nutritional components reinforce each other.
For babies and toddlers: a gentle massage with Kindred Naturals' Magnesium Lotion after bath time, focusing on the back, legs, and feet. It absorbs quickly, isn't greasy, and the massage itself has been shown to support sleep in young children.
For moms: apply after your own shower or as the last step in your evening routine. The lightweight texture means it won't leave residue on your sheets, and the ritual of applying it is itself a moment of intentional self-care in what is often an exhausting season of life.
Are There Other Ways to Boost Magnesium Beyond a Lotion?
Yes — and a multi-pronged approach is always going to be more effective than any single intervention. Foods naturally high in magnesium include:
- Dark leafy greens (spinach, Swiss chard)
- Pumpkin seeds and sunflower seeds
- Black beans and lentils
- Avocado
- Dark chocolate (70%+)
- Whole grains like quinoa and brown rice
For children who are picky eaters or adults dealing with high stress loads, a topical approach alongside a varied diet gives you more than one route to adequate levels.
If you're considering oral magnesium supplements for yourself or your child, always consult your pediatrician or healthcare provider first. The form of magnesium matters — magnesium glycinate and magnesium threonate tend to be better tolerated than magnesium oxide, which is more likely to cause GI upset.
Frequently Asked Questions
Is magnesium lotion safe for babies?
A properly formulated topical magnesium lotion — free from synthetic fragrance, parabens, and harsh preservatives — is gentle enough for babies. Always do a small patch test first, and avoid applying to broken or irritated skin. Our Magnesium Lotion at shopkindrednaturals.com is formulated specifically with babies and young children in mind.
How long does it take to see results from transdermal magnesium?
The PLOS ONE pilot study used two weeks of consistent daily application. Most people who notice changes report them within one to three weeks of consistent nightly use. Consistency matters more than amount.
Can magnesium deficiency cause poor sleep in toddlers?
There is limited peer-reviewed research specifically on magnesium deficiency and sleep in toddlers, though the neurological mechanisms (GABA regulation, nervous system excitability) apply across age groups. If your toddler has chronic sleep difficulties, discuss dietary intake and any supplementation with your pediatrician.
What's the difference between magnesium chloride and magnesium sulfate (Epsom salt)?
Both are used in topical applications. Magnesium chloride has a higher bioavailability and is generally considered more effective for transdermal use. Epsom salt (magnesium sulfate) is the traditional bath soak form — also useful, but less concentrated per application than a dedicated lotion.
Should I take oral magnesium supplements instead of using a lotion?
They serve different purposes. Oral supplements deliver a measurable, controlled dose. Topical magnesium is gentler, easier to build into a routine, and offers a sensory/ritual component that supplements don't. For children especially, topical application removes the challenge of getting them to take a supplement. Many families use both.
If you're looking for a simple, intentional way to support your family's sleep from the outside in, explore The Nightly Reset Magnesium Lotion at shopkindrednaturals.com — made for babies and moms, formulated clean, and designed to be the last thing you reach for before bed.
Written by Mike & Carly Pronsky, founders of Kindred Naturals.