Overview
Combination stack; see individual Vitamin D3 and Vitamin K2 entries for full details.
- Whole-food sources (animal products for fat-soluble and B-complex vitamins; produce for water-soluble vitamins)
- Fortified foods (cereals, dairy, plant milks, nutritional yeast)
- Multivitamins or stand-alone supplements in synthetic or food-derived form
- Combined softgel
Mechanism of action
D3 increases intestinal Ca absorption; K2 carboxylates osteocalcin and MGP to direct Ca to bone.
- · VDR signaling
- · Vitamin K-dependent carboxylation
Effects on the body
Organ system effects
Vitamin D3 + K2 Synergy Note contributes to bone mineralization, osteoblast activity, or calcium-phosphate homeostasis.
Vitamin D3 + K2 Synergy Note supports endothelial function, lipid profile, or blood-pressure regulation in cardiovascular trials.
Evidence-based benefits
Synergistic for bone & cardiovascular calcium handling
Moderate evidencePotential side effects
- · Vitamin D3 + K2 Synergy Note is generally well-tolerated at evidence-based doses
- · Mild GI discomfort (nausea, loose stools, or bloating) possible at higher intakes
- · Headache or transient fatigue reported by a small fraction of users
- · Allergic or hypersensitivity reaction (rash, itching, swelling)
- · Sleep disturbance if taken late in the day
- · Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing
Drug interactions
Supplement interactions
- MagnesiumCofactor for vitamin D activation.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
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Third-party testedIndependently verified Vitamin D3 + K2 Synergy Note — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Vitamin D3 + K2 Synergy Note third party tested NSF
CapsulesPre-measured Vitamin D3 + K2 Synergy Note capsules — easiest for travel and consistent daily dosing without scoops or scales.Vitamin D3 + K2 Synergy Note capsules
PowderBulk unflavored Vitamin D3 + K2 Synergy Note powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Vitamin D3 + K2 Synergy Note powder unflavored
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Vitamin D3 + K2 Synergy Note: pharmacology, clinical evidence, and safety — narrative review
Examine.com Research Team
Curated narrative review of human and preclinical evidence for Vitamin D3 + K2 Synergy Note, including mechanism, typical dosing, and safety considerations.
Best-supported outcome: Synergistic for bone & cardiovascular calcium handling (evidence: moderate). Additional outcomes and limitations summarized in the full profile.
PubMed: Vitamin D3 + K2 Synergy Note — Synergistic for bone & cardiovascular calcium handling
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Google Scholar: Vitamin D3 + K2 Synergy Note — clinical evidence
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