The results speak for themselves.
Up to 9,388% more magnesium delivered into the skin's surface layers than the leading spray.
We put Sweet Sleep Magnesium Butter through independent laboratory testing. The results confirmed what our customers have been saying all along.
The numbers
Not a small margin. An entirely different category of delivery.
We put Sweet Sleep Magnesium Butter through independent laboratory testing. The results confirmed what our customers have been saying all along.
4,442%
Vs. baseline
More magnesium delivered into skin surface layers than the control baseline, in a laboratory model.
9,388%
Vs. leading spray
Greater magnesium absorption into skin surface layers than the leading magnesium spray under identical conditions.
8hrs
Sustained delivery
Confirmed continuous magnesium delivery across a full eight-hour in vitro evaluation. All night long.
Sweet Sleep 8-Hour Delivery Study · Independent laboratory · 2026
The Sweet Sleep 8-Hour Delivery Study
Two products. Same skin model. Every hour, tracked.
Scientists applied each product to identical skin models, then captured fluorescent imaging at 15 minutes, 1 hour, 4 hours and 8 hours. The magnesium shows up green and the skin’s own cells show up blue. The more green you see, and the deeper it sits, the more magnesium has reached the skin’s surface layers.
Magnesium Spray
Magnesium Butter
What amazed us wasn’t the first result. It was the last.
Eight hours later, Sweet Sleep continued to show a strong magnesium signal throughout the skin model, while the benchmark spray was much less prominent.
Why a butter beats a spray
Sprays disappear. A butter lingers.
The leading spray
A flash flood.
Benchmark spray · 8 hours
- Water-based mist evaporates from the skin in seconds.
- Delivers a sudden mineral rush that burns out fast.
- Can shock and sting the skin barrier.
- At the 4-hour mark, magnesium signal has largely dropped off.
Sweet Sleep butter
A slow-drip reservoir.
Sweet Sleep Butter · 8 hours
- Anhydrous botanical butter holds magnesium against the skin.
- Slow, sustained release — a moisturising reservoir.
- Cushions the barrier. No sting, no shock.
- At 8 hours, magnesium signal is still strong.
A note from the founder
Most people think magnesium is the secret. We believe the formulation is.
When I created Sweet Sleep, I wasn't trying to make another magnesium product. I wanted to create one that performed differently. For years, you've told us the same thing: "I've tried magnesium before, but nothing works like Sweet Sleep." So we decided to find out why.
We commissioned one of the world's leading independent skin science laboratories to conduct the Sweet Sleep 8-Hour Delivery Study against one of the leading topical magnesium sprays. Because if we were going to test Sweet Sleep, we wanted a real comparison.
As a founder, that was one of the proudest moments of my career. It reminded me why we obsess over every ingredient, every texture and every detail. Because when formulation comes first, remarkable things can happen.
HollieFounder, Sweet Bee Organics
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The science convinced us. You convinced everyone else.
Sleep is sacred. You deserve to feel the difference.
From the moment you apply, Sweet Sleep is confirmed to have instant onset — followed by sustained, continuous delivery across a full eight-hour window. While you sleep, your skin is quietly absorbing.
Shop Sweet SleepThe Sweet Sleep 8-Hour Delivery Study
Independent laboratory in vitro evaluation, 2026. All percentages refer to magnesium delivery into the skin's surface layers under laboratory conditions on standardised skin models, not to systemic absorption. Results are laboratory findings and are not a claim about individual outcomes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.