K2-D3 Max™
D3 + K2 work together to direct calcium into bone matrix.*
5,000 IU D3 supports immune function year-round.*
K2 (MK-7) helps keep calcium in bones and out of arteries.*
Vitamin D3 (Cholecalciferol), Vitamin K2 (MK-7 Menaquinone), Calcium Carbonate, BioPerine® (Black Pepper Extract)
Delivery — Ships out next business day. Free insured shipping on $100+.
Quality — Made in USA. GMP-Certified. 3rd-Party Tested.
Standards — Non-GMO. Keto-Friendly. Gluten-Free. No Artificial Fillers.
Guarantee — 60-Day Money-Back.
Your K2-D3 Protocol
Vitamin K2 and D3 benefits build with 90+ days of consistent use
3 Bottles
6 Bottles
Method
Three benefits of paired D3 and K2
D3 absorbs calcium from food. K2 directs that calcium into bones rather than arteries. Most D3 supplements ship without K2, leaving the system half-finished. This formula pairs both at clinically validated doses with calcium and BioPerine for absorption.
Stronger Bones
D3 increases calcium absorption. K2 activates the proteins that bind calcium into bone matrix. Together they support bone mineral density, especially through perimenopause and beyond.
Immune Defense
D3 supports immune cell function and helps regulate the body's natural defense response. 5,000 IU is the dose used to maintain optimal D3 blood levels year-round, especially in winter or for indoor-heavy lifestyles.
Heart & Artery Health
K2 in MK-7 form supports proper calcium routing, helping keep calcium in bones and out of arterial walls. Population studies link adequate K2 intake with healthier cardiovascular markers over time.
Customer Results
What customers reported after 90 days
Self-reported survey of verified buyers using 5,000 IU D3 and 100mcg K2 (MK-7) daily.
87%
D3 levels improved on lab tests
81%
Steadier daily energy
76%
Fewer seasonal sick days
Timeline
What to expect
D3 blood levels rise first. Immune support follows. Bone and cardiovascular benefits compound with sustained daily use.
D3 levels rise
Blood D3 levels begin to climb. Most users notice mood and energy shifts in this window if they were deficient.
Immune support and energy
Daily energy steadies. Many users report fewer common-cold disruptions as D3 reaches optimal range. The immune lift is most felt in fall and winter.
Bone density support
K2-activated proteins reach steady levels. Calcium routing optimizes. Lab tests at this point typically show D3 in the optimal 50 to 80 ng/mL range.
Sustained levels
Daily use maintains tissue D3 and K2 at supplemented levels. Bone, immune, and cardiovascular support continue with consistent daily use.
Formula
D3 paired with K2 for proper calcium routing
Most D3 supplements ship without K2. The result is a half-system: D3 helps absorb calcium, but K2 is required to direct that calcium to bones rather than arteries. This formula pairs both at clinically validated doses, with calcium and BioPerine for absorption.
D3 (cholecalciferol) at 5,000 IU plus K2 (menaquinone-7) at 100mcg. The MK-7 form has a longer half-life than MK-4 and is the form used in cardiovascular research. BioPerine and calcium round out the absorption profile.
- Vitamin D35,000 IU · 625% DV · Cholecalciferol
- Vitamin K2100mcg · MK-7 menaquinone
- Calcium210mg · 16% DV · Carbonate form
- BioPerine5mg · Black pepper extract
How to use
Quality standards
Reviews
Verified buyer experiences
D3 levels went from deficient to optimal
"D3 levels went from deficient to optimal in 3 months. The K2 combo is a game changer. My doctor was impressed when she saw the new lab numbers and the formula I was using. The 5,000 IU paired with K2 is the right approach."
Bone density held steady at 56
"Postmenopausal, bone density was getting watched closely. Doctor recommended D3 plus K2 instead of just D3 alone. Started this 6 months ago. Latest DEXA scan held steady, no further loss. The K2 routing the calcium to bones is real science. Cleanest formula I found."
Cleanest D3+K2 I could find
"Researched before buying. Most D3 on the market is alone. Most K2 products use cheap MK-4 with shorter half-life. This is MK-7 paired with 5,000 IU D3 plus BioPerine. The single capsule per day with food is convenient. 12 weeks in and lab numbers improved."
Fewer winter sick days
"Live in the Pacific Northwest. Fall and winter were rough on immunity. Started this in October. By February I'd skipped the usual two or three colds I'd been getting every winter for years. The 5,000 IU year-round is what kept my D3 levels in range."
Energy lifted by week 5
"D3 deficient on my labs. Started this hoping for an energy lift. Took about 5 weeks but it showed up. Mornings are clearer. Less afternoon fade. Will retest D3 levels at the 3-month mark to see where I'm at. Sticking with it."
Cardiologist suggested K2 with D3
"61, cardiologist mentioned K2 was missing from my D3-only stack. The arterial calcification angle made sense. Found this one with both at the right doses. 4 months in and labs look better than the prior year. The MK-7 form is the right one for cardiovascular support."
Replaced two separate bottles
"Was running D3 5,000 and K2 100mcg as separate bottles. Two reminders, two costs. This combines them at the same doses I was already taking, plus calcium and BioPerine. Down to one capsule. Lower total cost. Smart consolidation."
Mood lifted within a month
"Winter mood had been a struggle for years. D3 deficient on every test. Started this in November and within 4 weeks the morning fog was different. Brighter, clearer. Maintained through the dark months. The 5,000 IU is what got me into range."
Active at 67
"Walk 4 miles a day, watch my labs. D3 had been borderline for years. Started this 5 months ago. Latest D3 was 68 ng/mL, in the optimal range. Bone health markers held steady. K2 plus D3 plus calcium plus BioPerine is the right stack at my age."
FAQ
Common questions
D3 blood levels rise within the first 4 weeks. Energy and immune effects often show up at 4 to 8 weeks if you were deficient. Bone density and cardiovascular benefits compound over months of consistent daily use.
D3 increases calcium absorption from food. K2 activates the proteins that direct that calcium into bones rather than arterial walls. Without K2, high-dose D3 can result in calcium ending up where you don't want it. The two work as a paired system.
5,000 IU is a maintenance dose commonly used to keep blood D3 levels in the optimal 50 to 80 ng/mL range, especially for indoor-heavy lifestyles or northern climates. If you're starting from severe deficiency, your provider may recommend higher loading doses for a short period. Talk to your provider and check your blood D3 level periodically.
This formula uses MK-7. MK-7 has a half-life of about 72 hours, compared to MK-4 at about 1 to 2 hours. That means MK-7 keeps K2 levels stable across the day with one capsule, while MK-4 typically requires multiple daily doses. MK-7 is also the form used in most cardiovascular research.
One capsule with breakfast or another meal containing fat. Both D3 and K2 are fat-soluble. Absorption increases significantly when taken with dietary fat. Avoid taking on an empty stomach.
Talk to your healthcare provider before starting if you take blood thinners (K2 can affect Warfarin specifically), if you have kidney disease, or if you take other vitamin D supplements. The dose in this formula is meant to be the primary D3 source, not stacked with additional D3.
Yes, especially if you've been deficient before or have ongoing health conditions. The test is a simple 25-hydroxyvitamin D blood test, often included in routine bloodwork. Most providers consider 50 to 80 ng/mL the optimal range. Retesting at 90 days shows whether your dose is right for you.
D3 and K2 are well-tolerated by most users at the doses in this formula. Long-term high-dose D3 without monitoring can cause hypercalcemia (elevated blood calcium), which is why periodic blood tests are recommended.
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