Free Shipping on orders $25+

Popular searches

Cart

Your cart is empty.
WindmillTrusted since 1972

Magnesium 400mg Muscle & Nerve Support Tablets 100ct

Supports healthy muscles, nerves, and daily energy with 400 mg of magnesium plus calcium!

  • Muscle Function
  • Nervous System
  • Daily Energy
Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 1

magnesium, the everyday way

Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 2
Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 3
Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 4
Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 5
Windmill Magnesium 400mg Muscle & Nerve Support Tablets 100ct — view 6
Subscribe10%Off
Delivered
  • Save 10% on every order + exclusive deals
  • Free shipping on orders over $25
  • Skip, pause, or cancel anytime
Choose your quantity

Add $16.01 more for free shipping

  • AuthorizedWindmill Retailer
  • Same-DayShipping
  • 30-DayGuarantee
“Great product, great site, quick delivery and great prices!!!”
Lorenzo G. · Verified buyer · Moore Vitamins store review
Vitamin D3 5000 IU

Add Vitamin D3. Magnesium helps your body use vitamin D.

  • 100% Authentic Products
  • Temperature-Controlled Storage
  • 30-Day Guarantee

Product details

About This Product

Support healthy muscle function, nervous system balance, and daily energy production with Windmill's potent 400 mg magnesium formula—the optimal daily dose for adults seeking comprehensive mineral support.

Key Benefits

  • Supports healthy muscle relaxation and function
  • Promotes nervous system health and calm
  • Helps maintain energy metabolism and cellular function
  • Supports healthy bone structure and strength
  • Aids in healthy sleep quality and rest

Each 2-tablet serving delivers 400 mg of magnesium (magnesium oxide & magnesium carbonate) plus 90 mg of calcium for enhanced absorption and bone support. This clean formula is Non-GMO, Vegan, Gluten-Free, and free from dairy, soy, artificial colors, flavors, and preservatives. Ideal for active adults, those experiencing muscle tension, or anyone seeking better sleep quality and daily energy support.

Formulated by Windmill Health Products—a trusted American supplement brand for over 50 years, manufactured in an FDA-regulated, cGMP-certified facility in the USA.

Dairy-Free
Gluten-Free
Non-GMO
No Artificial Colors
No Artificial Flavors
No Preservatives
Soy-Free
Sugar-Free
Vegan
Made in the USA

What's Inside

Supplement Facts

Serving Size 2 Tablets

Amount Per Serving% Daily Value
Calcium (as dicalcium phosphate)90 mg7%†
Magnesium (as magnesium oxide & magnesium carbonate)400 mg95%†

†Percent Daily Values are based on a 2,000 calorie diet.

Other Ingredients

Dicalcium phosphate, microcrystalline cellulose, stearic acid, croscarmellose sodium, silica, magnesium stearate and coating (hypromellose, glycerin, titanium dioxide).

Free Of

SugarWheatSoyMilkArtificial colorsFlavors or preservatives

At a Glance

  • Serving Size2 tablets
  • Total Tablets100
  • DietaryDairy-Free

Key Actives

  • Magnesium
    400 mg · 95% DV

Dietary Details

  • Dairy-Free
  • Gluten-Free
  • No Artificial Colors
  • No Artificial Flavors

Review the complete bottle label for all ingredients, daily values, allergens, and warnings.

Verified Store Reviews

Real Reviews. Real Customers.

Great product, great site, quick delivery and great prices!!!

Lorenzo G.5 months agoVerified

The items from Moore Vitamins shipped so fast and the customer service was great. The vitamins are good quality and perfect for what I needed. I will be buying Moore again

Emily B.4 months agoVerified

The overall customer service was excellent, and the transaction was smooth from start to finish. Delivery was faster than I expected, which was a pleasant surprise.

Joy P.4 months agoVerified

Everything was great with my last order. I will definitely be ordering again.

Billy T.4 months agoVerified

I’ve been buying this exact thing other places at a higher cost, so happy to find this. Tech support helped me find the exact thing I needed. And I got it just a few days.

Daniel T.4 months agoVerified

I had a fantastic experience purchasing my vitamins from this online shop. The website was easy to navigate, making it simple to find exactly what I was looking for. The ordering process was quick and hassle-free, and the prices were great.

Emily B.4 months agoVerified

So far, so good. Fast delivery.

Fred S.5 months agoVerified

I am so Happy that i found Moore Vitamins while scrolling. They're expediate sending out the items and the items is of Great Quality.

Batisa C.3 months agoVerified

Costumer service and communication was great! A man named Daniel helped me find the product I was looking for and ensured that it was in stock. He helped me set up shipping and I really appreciated it. Highly recommend this company for all your vitamin needs!

Alex2 months agoVerified

Great customer service and great quality vitamins. My order always comes in so fast and the quality is amazing

Emily3 months agoVerified

Fast shipping and great customer service made me feel confident to place another order

David2 months agoVerified

Customer Product Reviews

No reviews yet
Authorized Reseller

We’re new.
The brands we carry aren’t.

Direct from the source

Authorized Reseller

We buy directly from the manufacturer, so every product is 100% authentic and properly sourced.

Sealed & Brand-new

Factory-sealed.

Same-day Shipping

Order by 5 PM ET.

30-day Guarantee

Satisfaction guaranteed.

Secure Checkout

Apple & Google Pay.

Tried this product?

Leave the first review and we’ll send you 20% off your next order — for any honest review, good or bad.

Frequently Asked Questions

They’re all magnesium. The word after “magnesium” tells you what it’s bound to, and that changes how it feels and how much you get.

This one is magnesium oxide: 400 mg of magnesium per 2 tablets. It packs the most magnesium into each tablet.

Other magnesium we carry:

Glycinate (100–200 mg per serving; capsule, gummy): gentle and highly absorbable, a popular evening choice.

Citrate (325–400 mg per serving; powder, tablet): well absorbed, and often chosen for regularity.

Oxide (482.6 mg per serving; tablet): the most magnesium in each tablet.

Gluconate (27 mg per serving; tablet): a gentle, lower-dose form that’s easy on the stomach.

Multi-form complex (250 mg per serving; capsule): several forms of magnesium in one capsule.

Compare labels by the magnesium amount, not the compound weight. Taking medication, or have kidney concerns? Ask your healthcare provider which form suits you.

Most people notice a difference within 2–4 weeks of daily use.

Supplements work gradually, so consistency matters most. Take it at the same time each day and check in on how you feel week to week.

Take 2 tablets daily as a dietary supplement or as directed by a healthcare professional.

It’s made under the FDA’s current Good Manufacturing Practice (cGMP) rules, which require every batch to be tested for identity, strength and purity.

Certifications: Dairy-Free, Gluten-Free, No Artificial Colors, No Artificial Flavors, No Preservatives, Non-GMO, Soy-Free, Sugar-Free, Vegan, Made in the USA.

We buy directly from authorized Windmill distributors — never marketplace resellers.

Generally, yes.

Space calcium, iron, zinc and magnesium about two hours apart, and check your other supplements for the same ingredients so doses don’t stack up.

Taking medication, pregnant or nursing? Ask your healthcare provider first.

Return any unopened bottle within 30 days of delivery for a full refund. No restocking fee.

Arrived damaged or wrong? Send us a photo at moorevitamins.com/contact and we’ll refund or replace it.

Yes. Subscribe & Save takes 10% off every delivery, not just the first.

Choose monthly, every 2 months or every 3 months. Skip, pause or cancel anytime from your account — no fees, no minimum.

Complete Your Routine

Windmill Vitamin B6 Pyridoxine HCl 250mg Tablets 60ct

Magnesium + B6, a classic pair

Windmill Vitamin B6 Pyridoxine HCl 250mg Tablets 60ct

$9.99$19.98
Nature's Bounty Vitamin D3 1000 IU Rapid Release Softgels 350ct

Magnesium helps activate D3

Nature's Bounty Vitamin D3 1000 IU Rapid Release Softgels 350ct

$16.50$33.00
Windmill Vitamin K2 & D3 100mcg/25mcg Tablets 60ct

Magnesium helps activate D3

Windmill Vitamin K2 & D3 100mcg/25mcg Tablets 60ct

$9.99$19.98
Goli Extra-Strength Sleep 10mg Melatonin Gummies 50ct

Wind-down pairing

Goli Extra-Strength Sleep 10mg Melatonin Gummies 50ct

$14.98$25.00