# item.guide
Side-by-Side Comparison Essential Vitamins & Minerals

Magnesium (Elemental Mg) vs. Vitamin K1 (Phylloquinone)

Comparing 2 standards across 10 specifications. 10 key differences identified.

Comparing:
Magnesium (Elemental Mg)
Vitamin K1 (Phylloquinone)

Magnesium is an essential macromineral required as an enzymatic cofactor in over 300 biochemical reactions including ATP synthesis, DNA replication, and neuromuscular transmission. Adult RDA is 400–420mg (men) / 310–320mg (women).

View full Magnesium (Elemental Mg) spec sheet →

Vitamin K1 is a fat-soluble naphthoquinone synthesized by photosynthetic plants. Adequate Intake (AI) is 120µg (men) / 90µg (women), acting as an essential cofactor for gamma-glutamyl carboxylase in blood clotting and osteocalcin bone mineralization.

View full Vitamin K1 (Phylloquinone) spec sheet →

Specification Comparison Table

10 Parameters
Parameter / Spec
Nutrient Type
Essential Macromineral Fat-Soluble Naphthoquinone Vitamin
Tolerable Upper Limit (UL)
350 mg / day (From supplemental forms only; no limit on whole foods) None Established (No adverse effects reported)
Chemical Forms
Magnesium Glycinate (Chelate), Citrate, Malate, Oxide, L-Threonate Phylloquinone (K1 - Green Plants), Menaquinones (K2: MK-4, MK-7 - Ferments/Animal)
Primary Biological Function
Mg-ATP complex cofactor (>300 enzymes), NMDA receptor gatekeeper, Protein synthesis, Muscle relaxation Gamma-glutamyl carboxylase cofactor (Factors II, VII, IX, X), Osteocalcin carboxylation, Matrix Gla Protein (MGP) vascular calcification inhibitor
Deficiency Condition
Muscle cramps, Tremors, Ventricular arrhythmias, Insulin resistance, Insomnia Coagulopathy, Hemorrhage, Impaired bone density
Top Whole Food Sources
Pumpkin Seeds, Hemp Hearts, Chia Seeds, Almonds, Spinach, Black Beans, Dark Chocolate Spinach, Kale, Broccoli, Brussels Sprouts, Natto (K2 MK-7), Parsley
Adult RDA / RDI
400 – 420 mg / day (Men) / 310 – 320 mg / day (Women)
Cellular Distribution
99% intracellular (60% bone, 39% skeletal muscle, <1% serum)
Adult Adequate Intake (AI)
120 µg / day (Men) / 90 µg / day (Women)
Warfarin / Anticoagulant Interaction
Direct competitive antagonist to Coumadin/Warfarin (requires consistent daily intake)