Pantothenic Acid (B5) vs Vitamin K2 (MK-7)

Mechanism

Pantothenic acid is converted to Coenzyme A (CoA), the universal acyl-group carrier essential for >100 metabolic reactions. CoA is required for: fatty acid synthesis and beta-oxidation, citric acid cycle (acetyl-CoA entry), steroid hormone synthesis (pregnenolone from cholesterol), acetylcholine synthesis, melatonin synthesis, and Phase II detoxification (acetylation reactions). Pantethine (the active form) supports healthy lipid metabolism by inhibiting hepatic HMG-CoA reductase and fatty acid synthase, while stimulating fatty acid oxidation.

Standard Dosing

500mg pantothenic acid or 300mg pantethine twice daily

Timing

With meals. Split doses for pantethine.

Cycle Duration

ongoing

Side Effects

• Diarrhea at high doses
• GI discomfort
• Contact dermatitis (topical dexpanthenol)

Contraindications

• Hemophilia (theoretical concern: pantethine may have mild antiplatelet effect at high doses)

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Mechanism

Vitamin K2 (menaquinone-7) activates vitamin K-dependent proteins via gamma-carboxylation of glutamic acid residues. Key targets: osteocalcin (directs calcium into bone matrix), matrix Gla protein (MGP, inhibits arterial calcification), Gas6 (cell signaling, neuroprotection), and protein S (anticoagulant). MK-7 has a long half-life (~72 hours vs 1-2 hours for K1) enabling consistent carboxylation activity with once-daily dosing. It works synergistically with Vitamin D3 to regulate calcium metabolism — D3 increases calcium absorption while K2 directs its deposition.

Standard Dosing

100-200 mcg MK-7 daily

Timing

With fat-containing meal alongside Vitamin D3.

Cycle Duration

ongoing (mandatory co-supplement with Vitamin D3)

Side Effects

• Generally very well tolerated
• Rare: mild GI discomfort
• Theoretical thrombotic risk in deficiency-rebound scenario (unproven)

Contraindications

• Warfarin/coumarin anticoagulant therapy (unless specifically directed by physician with INR monitoring)

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