Rated 4.8 by verified customers
I use this on my shoulders after long days at my desk. It absorbs fast and doesn't leave any residue on my clothes. I switched from oral magnesium because of the stomach issues and this is so much better for me.
Desk Tension
Been using CALM after CrossFit sessions for my legs and lower back. Lightweight, no smell, doesn't feel like those chalky drugstore creams. It's part of my routine now.
Post-Workout
My physical therapist recommended topical magnesium and I tried three brands before this one. CALM is the only one that doesn't feel greasy or leave a film.
PT Recommended
Video Reviews
In their own words
Individual results may vary.
Daily topical magnesium
For the tension you can point to
Lower backLoosens stiffness from standing, lifting, long days
Knees & legsCalms post-run flare-ups, end-of-hike stiffness, end-of-day ache
Calves & feetQuiets the calves and feet that twitch after lights out
Post-workoutSoothes post-training soreness before it sets in
Neck & shouldersEases desk-job tightness, screen-time tension, end-of-day knots
Jaw & faceReleases nighttime clenching and morning jaw tightness
Physician-Reviewed
Medical Advisory Board
Dr. Alexander J. Acosta, MDPrimary Care Physician · Emergency & General MedicinePhysician-Reviewed
“Many patients don’t always know there are topical options for localized pain and tension. That’s why I see real value in KETRO: it lets patients apply the cream directly to areas like the neck, shoulders, lower back, knees, or overworked muscles.”
THE SCIENCE
WHAT MAGNESIUM DOES
Muscles tighten on calcium and relax on magnesium. When magnesium runs low, tension builds: tight shoulders, twitchy calves, a clenched jaw.
Pills and powders can deliver magnesium too, but only after a full trip through your digestive system. CALM absorbs through the skin and reaches the muscle tissue directly. Never through your gut, never anywhere it doesn't need to be.
01
Step 1: The Skin
Smooth a thin layer onto the area of tension. Magnesium chloride passes the skin barrier in under 60 seconds. No residue, no film.
02
Step 2: The Muscle
Active magnesium reaches the muscle tissue underneath and quiets the overactive nerve signals that drive tension, cramping, and tightness.
What to expect
What should I expect from consistent use of Ketro CALM?
Day 1
Absorbs in under 60 seconds
Magnesium chloride, right where tension builds. Rubs in fast, no residue. Part of the wind-down, not a chore.
Week 1
The routine is the treatment
A thin layer on the target area, morning or night. That's it.
Week 3
The habit compounds
Used daily, magnesium compounds. Nightly application is the whole game. The 3-tube supply keeps it going.
Month 2+
Tension stops running your day
Steadier evenings, calmer legs, looser shoulders, without another pill. Keep one tube at the desk and one by the bed.
Individual results may vary. Not intended as medical advice.
GET CALM
60-Day Guarantee · Free Shipping On 2+ Tubes
The Comparison
How Ketro CALM Compares
KETRO CALM
MAGNESIUM PILLS
DRUGSTORE TOPICALS
Formulated like skincare
✓
✕
✕
Absorbs in under 60 seconds
✓
✕
✕
Nothing to digest
✓
✕
✓
Targeted to the spot
✓
✕
✓
60-day money-back guarantee
✓
✕
✕
The Offer
Get Ketro CALM
CALM: Magnesium Cream, delivered on your schedule. 60-day guarantee: feel the difference or you don't pay.
Subscribe & Save · From $1/day
Best Value
90-Day Supply
Save 40%
$30/mo
$50
$1.00/day
Billed $90 every 3 months · Cancel anytime
What's included
CALM: Magnesium Cream — 90-day supplyThree 150ml tubes, shipped together every 3 months
Free shipping, every refill
60-day guaranteeFeel the difference or you don't pay
30-Day Supply
Save 30%
$35/mo
$50
$1.17/day
Billed $35 every month · Cancel anytime
What's included
CALM: Magnesium Cream — 30-day supplyOne 150ml tube, shipped monthly
60-day guaranteeFeel the difference or you don't pay
One-Time Purchase
One tube
$50
$1.67/day
Billed once · One 150ml tube
What's included
CALM: Magnesium Cream — one 150ml tubeShips once. No auto-refills.
60-day guaranteeFeel the difference or you don't pay
Free shipping $75+
60-Day Guarantee
Cancel Anytime
DAILY TOPICAL MAGNESIUM
WHO IT'S FOR
CALM is for the tension that shows up daily - and never fully lets go
- Neck and shoulder tightness from desk work
- Post-workout soreness and recovery
- Calves and feet that twitch at night
- Jaw clenching and grinding
- Magnesium-pill users tired of the gut drama
- Anyone who wants one less pill
★★★★★
Loved by verified customers
“My friend kept telling me to try the magnesium cream. Felt the difference the first night.”
“I might get a leg cramp once every two weeks now instead of every other night.”
Common Questions
How is CALM different from oral magnesium supplements?
Transdermal delivery bypasses the GI system entirely. No diarrhea, no cramping, no waiting for digestion. Applied directly to the muscles that need it.
Is magnesium actually absorbed through the skin?
Yes. Magnesium chloride is one of the smallest magnesium salts. It passes the skin barrier when applied topically and absorbs directly into the tissue beneath, bypassing the digestive system entirely. It goes skin to muscle, not skin to bloodstream to muscle.
What does it feel like on the skin?
Lightweight, fast-absorbing. Formulated like skincare. No chalky residue, no greasy film, no medicinal smell. Absorbs in under 60 seconds.
How long until I feel it?
Everyone's different, so we won't promise a date. What we can promise: apply it nightly, give it a fair run, and if you don't feel a difference within 60 days, you don't pay.
Will it help twitchy legs or nighttime calf cramps?
Many customers use CALM for twitchy legs and nighttime calf cramping. Massaged into the calves, shins, and bottoms of the feet 20 to 30 minutes before bed, it often quiets the crawling sensation and reduces overnight cramping. If you're already on a prescription medication for this, CALM isn't a replacement. But many find it works when oral magnesium alone didn't.
Will it help jaw tension or nighttime clenching?
Rubbed along the jawline, masseter, and temple area, CALM eases the muscle tension that drives clenching. Apply before bed if you grind at night, or mid-day if stress-clenching is the pattern. Many customers keep a tube on the desk for this.
Can I use this with my oral magnesium supplement?
Yes. Topical and oral magnesium work through different pathways, so there's no interaction risk at normal doses. Some customers switch entirely off oral magnesium (especially if it was causing GI issues); others use both.
How is this different from Epsom salts or magnesium oil?
Epsom salts (magnesium sulfate) diffuse through bathwater. Good for whole-body soaks, not targeted, and you need a tub. Magnesium oil is potent but often stings and leaves a salty film. CALM uses the same magnesium chloride as magnesium oil, in a skincare-grade cream base. Targeted, comfortable, and built for daily use without the film.
What's the 60-day guarantee?
Feel the difference or you don't pay. If CALM isn't working for you, reach out within 60 days of your order for a full refund. No returns, no forms.