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Bone Strength Duo
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calcium found its perfect partners

Bone Health

Bone Strength Duo

For anyone building a daily bone routine who wants calcium together with the vitamins that help the body use it.

  • Bone & Teeth
  • Calcium Absorption
  • Muscle Function

Vitamin D3 helps your body absorb calcium, and Vitamin K2 supports healthy calcium use in your bones, so each bottle helps the other do its job.

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  • Save 20% on every order + exclusive deals
  • Free shipping on orders over $25
  • Skip, pause, or cancel anytime
1
  • AuthorizedWindmill Retailer
  • Same-DayShipping
  • 30-DayGuarantee
“Great product, great site, quick delivery and great prices!!!”
Lorenzo G. · Verified buyer · Moore Vitamins store review
Windmill Magnesium Oxide 400mg Bone & Muscle Support Tablets 60ct

Add Magnesium Oxide 400 mg, a mineral that supports bone and muscle health.

What's in your bundle

The two essentials for your bone routine.

Each bottle plays a different role. Take them together as part of your daily routine.

Calcium Citrate Bone & Teeth Support 100ct

Calcium Citrate Bone & Teeth Support 100ct

2 tablets a day for 400 mg of calcium.

  • 100 tablets
  • 50 servings
  • Supports bone & teeth health
Vitamin K2 & D3 100mcg/25mcg 60ct

Vitamin K2 & D3 100mcg/25mcg 60ct

1 tablet a day with food: 100 mcg K2 and 25 mcg D3.

  • 60 tablets
  • Supports calcium utilization
  • Supports bone health
Bought separately$19.98Bundle price$17.99Save $1.99

Bone health basics

Why these two?

Calcium, Vitamin D3 and Vitamin K2 work together to support your bone routine.

Calcium

Calcium is an essential mineral that helps maintain strong bones and teeth as part of a healthy diet.

Vitamin D3

Vitamin D3 helps your body absorb calcium and supports bone health.

Vitamin K2

Vitamin K2 supports healthy calcium use in your bones as part of a healthy routine.

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
Authorized Reseller

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Direct from the source

Authorized Reseller

We buy directly from the manufacturer, so every bottle in this bundle is 100% authentic and properly sourced.

Sealed & Brand-new

Manufacturer-sealed, never opened. Stored in our climate-controlled facility.

Same or Next Business Day

Weekday orders before 5pm ET ship the same day; off-hours and weekend orders ship the next business day.

30-day Guarantee

Every order is backed by our 30-day satisfaction guarantee.

Secure Checkout

Stripe-powered with Apple Pay and Google Pay supported.

Frequently asked

Questions about this bundle

How long does the bundle last?
About two months. Calcium Citrate holds 100 tablets at 2 a day, which is 50 days. Vitamin K2 & D3 holds 60 tablets at 1 a day, which is 60 days. Subscribe & Save on this bundle ships every two months.
How do I take them?
Two Calcium Citrate tablets and one Vitamin K2 & D3 tablet a day, as each label directs. Take the K2 & D3 with food. Or follow your healthcare provider’s advice.
Why take calcium with Vitamin K2 and D3?
Vitamin D helps your body absorb calcium, and Vitamin K2 supports healthy bones. Calcium Citrate gives you 400 mg of calcium per serving (31% of the Daily Value). Vitamin K2 & D3 adds 100 mcg of K2 and 25 mcg of D3 (125% of the Daily Value), plus 45 mg of calcium.
I take a blood thinner. Can I use this?
Talk to your doctor first. Vitamin K affects how blood clots, so it matters if you take warfarin or another blood thinner. The same goes if you are pregnant, nursing or managing any medical condition.
Can I swap a bottle inside this bundle?
Bundle compositions are fixed — that’s how we’re able to lock in both the savings and the synergy between bottles. If you’d rather build your own mix, you can add any of our bottles individually from the shop and still get our pack-pricing discounts on each.
How does Subscribe & Save work on bundles?
Pick Subscribe & Save on any bundle and you save an extra 10% off the bundle price on every order, delivered on the schedule that matches how long the bundle lasts. You can pause, swap, or cancel any time from your account — no fees, no questions.
Does the whole bundle ship in one box?
Yes. Every bundle ships in a single box from our fulfillment partner, typically arriving in 2–5 business days. Orders over $25 get free shipping.
How long does a bundle last?
Each bundle is sized so you finish the bottles at roughly the same pace. Most last 30 days; the bundle’s description says how long yours lasts. If you subscribe, the next box arrives just as you’re running low.
What’s your return policy?
You have 30 days to try a bundle. If it isn’t working for you, contact us and we’ll make it right — full refund, no need to ship anything back.

Quality you can verify

Every bottle in this bundle is

  • Gluten-Free
  • Non-GMO
  • Dairy-Free
  • Soy-Free
  • Sugar-Free
  • No Artificial Colors
  • No Artificial Flavors
  • No Preservatives
  • Made in the USA
$15.98$19.98

Start the routine

One bundle, one box, one routine

Ships free over $25 and arrives in 2–5 business days. Subscribe and the next box is automatic — pause, swap, or cancel from your account any time.