This is an extract from Prunella vulgaris, which is traditionally known in Asian medicine as “self-heal”. According to the manufacturer, it improves the vitality and density of the hair and restores the well-being of the hair and scalp. Prunizen reportedly helps to modulate the production of the stress hormone cortisol by preventing the enzyme 11β-HSD1 from converting cortisone into active cortisol. Further information …