Acne-Review has researched the botanicals that have a beneficial role in combating the four major causative factors of acne. The list of botanicals described is only meant to provide some insight into their modes of function and is by no means exhaustive.

Table 1: Natural Extracts for impure skin

Sebum regulation:
— Licorice Extract
— Green tea extract

Anti-scarring, decrease of abnormal keratinization:
— Centella asiatica extract
— Willow extract
— Birch extract

Anti-microbial against “Propionibacterium acnes”:
— Green tea extract
— Tea tree oil
— Olive leaf extract

Anti-inflammatory efficacy:
— Aloe vera extract
— Calendula extract
— Passionflower extract
— Witch hazel extract
— Camomile extract
— Tea tree oil

Hyperpigmentation:
— Licorice extract
— Green tea extract
— Bearberry extract

The above information was sourced from:
http://www.scf-online.com/english/38_e/naturalactives38_e.htm