Get Vitamin K2 Online

Vitamin K1 (phylloquinone) is found mainly in leafy green vegetables and is primarily involved in blood clotting. Vitamin K2 (menaquinone) is found in fermented foods and certain animal products and plays a distinct role in activating proteins that regulate calcium metabolism, supporting both bone density and arterial health.

The two most studied forms are MK-4 and MK-7. MK-7 has a longer half-life in the body, meaning lower daily doses maintain more stable blood levels. MK-4 has been used at higher therapeutic doses in clinical trials for bone health. Your physician will recommend the form and dose best suited to your situation.

People at higher risk include those with fat malabsorption conditions (such as Crohn's disease or cystic fibrosis), individuals on long-term antibiotics that reduce gut bacteria, people with low dietary intake of fermented foods and animal proteins, and those taking certain anticoagulants or cholesterol-lowering medications that interfere with fat-soluble vitamin absorption.

Vitamin K2 can interact with warfarin (Coumadin) and other vitamin K-dependent anticoagulants, potentially affecting INR levels. You should not start Vitamin K2 supplementation without first speaking with your prescribing physician if you are on anticoagulant therapy. Our licensed physicians will review your medication list before prescribing.

Vitamin K2 deficiency can manifest as reduced bone mineral density, increased fracture risk, easy bruising, and in some research contexts, higher levels of arterial calcification. Because many of these findings are subclinical, a physician evaluation and relevant lab work help confirm whether supplementation is appropriate.

Improvements in bone biomarkers such as carboxylated osteocalcin can often be detected within 4 to 8 weeks of consistent supplementation. Meaningful changes in bone density typically require at least 6 to 12 months of treatment. Your physician may recommend periodic follow-up labs to track your response.

Doctronic uses an AI-powered evaluation to gather your symptoms and health history, which is then reviewed by a licensed physician. If treatment is appropriate, the physician creates a personalized treatment plan, which may include a prescription sent directly to your preferred pharmacy.

Yes. Doctronic works exclusively with licensed physicians who are fully credentialed in the states where they practice. All consultations are HIPAA-compliant, and every treatment plan is doctor-reviewed and audited for safety and clinical accuracy.