All Supplements
Vitamin K2 (MK-7) vs Iron
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
Vitamin K2 (MK-7)
Iron
Typical Dosage
100-200mcg MK-7 daily
8-18 mg daily for adults (varies by age and gender)
Best Form
MK-7 (Menaquinone-7)
Ferrous sulphate
Key Benefits
5
5
Evidence Rating
★★★★
★★★★
Best Time
With a fat-containing meal, ideally with Vitamin D3
Take on an empty stomach with vitamin C for enhanced absorption; separate from calcium and caffeine by 2+ hours
Vitamin K2 (MK-7) Benefits
✓Bone mineralisation
✓Cardiovascular protection (reduces arterial calcification)
✓Works synergistically with Vitamin D3
✓Dental health
✓May reduce fracture risk
Iron Benefits
✓Supports oxygen transport via haemoglobin
✓Enhances energy production and reduces fatigue
✓Improves cognitive function and concentration
✓Supports immune system function
✓Essential for healthy red blood cell formation
Can You Take Both Together?
In most cases, Vitamin K2 (MK-7) and Iron can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication.
Which Should You Choose?
Choose Vitamin K2 (MK-7) if your primary goal is: bone mineralisation. Choose Iron if your primary goal is: supports oxygen transport via haemoglobin. Many people take both as they target different aspects of health.
Disclaimer: This comparison is for educational purposes only. Always consult a healthcare professional before starting any supplement.