Originally formulated for the Boston Red Sox
KETRO
CALM · Topical Magnesium Cream

MAGNESIUM CREAM FOR STIFF AND TIGHT MUSCLES

NO PILLS.

Welcome Offer · Save up to $50 today
Add To Cart — 2 Tubes For $70
60 days to try it. If you don't reach for it, full refund.
Boston Red SoxOriginally formulated for the Boston Red Sox
★★★★★ 4.8/5 · read verified reviews
Dermatologist tested and LegitScript certified
Real magnesium chloride · made under ISO 22716 cosmetic GMP standards
Dr. Alexander J. Acosta

Physician Perspective

“Many people don’t always know there are topical options for localized tension and soreness. That’s why I see real value in KETRO: you apply the cream directly to areas like the neck, shoulders, lower back, knees, or overworked muscles.”
Dr. Alexander J. Acosta, MD Primary Care Physician · Emergency & General Medicine

Your tension is local. Your magnesium probably isn't.

A pill goes through your gut first. CALM goes straight into the spot that's tight.

The honest comparison

THREE WAYS TO USE MAGNESIUM

 
CALM
Cream
Magnesium
Pills
Oils &
Sprays
Absorbs clean, no greasy film
✓
—
✕
Won't leave residue on the sheets
✓
—
✕
Skincare-grade formula
✓
—
✕
Applied right where you're tight
✓
✕
✓
Nothing to swallow
✓
✕
✓
Verified Reviews

WHAT VERIFIED BUYERS SAY

★★★★★4.8/5 average from verified reviews
★★★★★
Saved my shoulder knots

“Recommended by my chiropractor for my bad shoulder knots. Life changing!!!”

Amy G.✓ Verified Reviewer
★★★★★
Perfect

“I love the smooth, non greasy application process. I can target the areas I need it and it soothed a tense muscle in my neck with just one application. I'll be back for more 10/10”

Kelsey M.✓ Verified Reviewer
★★★★★

“My calves were cramping up in the middle of the night when I stretched… I put the magnesium cream on before going to sleep”

Beth R.✓ Verified Reviewer
★★★★★
This helps

“my PT told me about this brand, he said it's stronger and better quality. I like it so far”

Michael W.
★★★★★ 4.8/5

Average Rating
FREE

Shipping

60 DAYS

Money-Back Guarantee

Common Questions

THE THINGS PEOPLE ASK FIRST

How is this different from magnesium pills?
A pill goes through your digestive system. CALM goes on the spot that's tight. Many people use both.
Will it feel greasy or sticky?
No. It's formulated like skincare: lightweight, fast-absorbing, nothing left on your sheets.
How fast will I feel it?
The massage-in itself feels good right away. Give it a week or two of nightly use before you judge the difference — and you have 60 days either way.
Can I use it alongside pills I already take?
CALM goes on your skin, not through your digestive system. If you're ever unsure, ask your doctor before adding any magnesium product to your routine.
What if it doesn't work for me?
Use it for 60 days. If you don't find yourself reaching for it, we refund you in full.
Is this a subscription?
No. One-time purchase, no auto-ship.
Limited Welcome Offer
$100 → $70

2 Tubes · Free Shipping · Save $30

Welcome pricing, applied automatically. 60-day guarantee.

★★★★★ 4.8/5 from verified reviews
ADD TO CART — 2 TUBES FOR $70
or try 1 tube for $40 →
60-Day Money-Back Guarantee·Free Shipping On 2+
Boston Red SoxOriginally formulated for the Boston Red Sox
CALM Magnesium Cream $30 OFF + FREE SHIPPING · 60-DAY GUARANTEE
Add To Cart — 2 Tubes For $70