Vitamin D3
as Cholecalciferol
125 mcg
625% DV
Helps your body absorb calcium and supports normal immune function.*
NIH Office of Dietary Supplements
Nutrition
Bone & Heart Support
Vitamin D3 and K2 as MK-7 — the pair that works better as a pair.
- Supports strong, healthy bones*
- Supports cardiovascular health*
- With vitamin K2 as MK-7*
1
How subscribing works
Full terms- Delivered every 2 months. Free shipping over $75.
- Skip or change the date from your account.
- Cancel online anytime.
- Save 20% on every delivery.
- Full Supplement Facts panel
- Formulated on published research
- Skip or cancel anytime
- Free shipping over $75
Why Bone & Heart Support exists
Sound familiar?
Eating less changes more than your plate.
A few bites and I'm done.
Smaller meals leave less room for vitamins and minerals.
60%+ fell short on key nutrients from food
Clin Obes 2026 · Read
I'm eating less, but am I eating enough?
You're not imagining it. One study measured 271 fewer calories at a single meal.
−271 kcal at a meal
Diabetes Metab Syndr 2026 · Read
Nobody told me what to eat with this.
You're not alone. Four medical societies now say nutrition belongs in GLP-1 care.
4 societies agree
Am J Clin Nutr 2025 · Read
Built by a family that's been through it. Read our story
Quotes describe common experiences. Studies aren't of DUO products. All research
Is this right for me?
Is Bone & Heart Support right for you?
An honest answer, so you can decide with confidence.
You'll probably like it if
- Your plate got smaller.You’re eating less and want the basics covered.
- You want one simple step.One daily foundation, not a cabinet of bottles.
- You like knowing why.Every ingredient listed, in plain language.
Bone & Heart Support
from $33.60/2 mo
Check with your provider first if
- You’re pregnant, nursing or planning to be.
- You take prescription medication, including for diabetes or blood pressure.
- You have a medical condition or an upcoming procedure.
- You take a blood thinner.
Still not sure? Ask us a question
DUO products are dietary supplements, not medications.
What's inside
Every nutrient has a job.
Per serving: 1 veggie capsule ·
Vitamin K2
as mk-7, as Menaquinone
100 mcg
Calcium
as Calcium Carbonate
210 mg
16% DV
Supports normal bones and muscle function.*
NIH Office of Dietary Supplements
Also insidePer serving%DV
BioPerine (Black Pepper Fruit Extract)5 mg†
† Daily Value not established.
Good to know
- • Provides 125 mcg (5,000 IU) vitamin D3 per capsule. Check with your provider if you take other vitamin D supplements.
- • Contains vitamin K2. Talk to your provider first if you take a blood thinner.
- ✓ Gluten-free
- ✓ Lactose-free
- ✓ Allergen-free
- ✓ Hormone-free
- ✓ Vegetarian (hypromellose capsule)
How to take it
Simple enough to keep doing.
Daily
From the label
As a dietary supplement, adults take one (1) veggie capsule once a day.
Habit
Keep it consistent
Same time each day makes it easy to remember.
Meets the DUO Standard
If we can't explain why it's here, it doesn't belong here.
Our own internal standard. Not a third-party certification.
- 01Purposeful
- 02Evidence-led
- 03Transparent
- 04Tested
- 05Explainable
Questions
Questions we'd ask if we were you.
As a dietary supplement, adults take one (1) veggie capsule once a day.
No. Every DUO product is sold on its own. The Complete Routine is for people who want all four areas covered at the best price.
Talk to your healthcare provider or pharmacist before starting any supplement if you take medication. Bring the full Supplement Facts with you; you can find them above.
No. DUO is an independent dietary supplement brand. It is not affiliated with, endorsed by, or connected to any pharmaceutical company or prescription medication.
Ready when you are
Add Bone & Heart Support to your DUO.
Vitamin D3 and K2 as MK-7 — the pair that works better as a pair.
Full Supplement Facts · Free shipping over $75 · Skip or cancel anytime
Want every area covered? See the Complete Routine
* 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. Talk with your healthcare provider before starting any supplement, especially if you take medication.