Each tube is enough for 4 fl oz of cream or Rosehip Seed Oil at approximately 2% concentration (2 mL in 120 mL cream).
Use at 1 to 5% final concentration. PROTECT FROM LIGHT, phytonadione is light sensitive and will lose activity if exposed to light. Use with a few drops of Anti-Oxidant Booster to improve the stability of the Phytonadione.