Zembrin, Sceletium Tortuosum Extract, 60 Tablets, Source NaturalsSource Naturals Zembrin Dietary Supplement. Supports Mental Well Being. Zembrin is an extract of Sceletium tortuosum, an herb traditionally used by the San people of South Africa for over 300 years to support emotional and mental well being. Take one small tablet per day. Zembrin is the first product with a benefit sharing agreement disbursing royalties to benefit the San people and ecologically sustainable cultivation in Africa. Zembrin is the