Botanicals derived from Tree of Heaven have long proven effective against a variety of ailments like skin infection and inflammation. It is also used in wounds and skin eruptions. Modern science credits Tree of Heaven derivatives with anti-inflammatory^1,2 and anti-microbial³ effects. This botanical has also been shown to stimulate innate immunity⁴  to combat infection.

References: 

1. Jin M. et al., Antiasthmatic activity of luteolin-7-O-glucoside from Ailanthus altissima through the downregulation of T helper 2 cytokine expression and inhibition of prostaglandin E2 production in an ovalbumin-induced asthma model. Biol Pharm Bull. 2009. 32(9):1500-3.
2. Jin MH. et al., Anti-inflammatory activity of Ailanthus altissima in ovalbumin-induced lung inflammation. Biol Pharm Bull. 2006. 29(5):884-8.
3. Zhao CC, Shao JH, Li X, Xu J, Zhang P. Antimicrobial constituents from fruits of Ailanthus altissima SWINGLE. Arch Pharm Res. 2005 Oct;28(10):1147-51.