Patnala S, Kanfer I. Investigations of the phytochemical content of Sceletium tortuosum following the preparation of "Kougoed" by fermentation of plant material. J Ethnopharmacol 2009;121:86-91. View abstract.
Smith C. The effects of Sceletium tortuosum in an in vivo model of psychological stress. J Ethnopharmacol 2011;133:31-6. View abstract.
Smith MT, Crouch NR, Gericke N, Hirst M. Psychoactive constituents of the genus Sceletium N.E.Br. and other Mesembryanthemaceae: a review. J Ethnopharmacol 1996;50:119-30. View abstract.
Smith MT, Field CR, Crouch NR, Hirst M. The Distribution of Mesembrine Alkaloids in Selected Taxa of Kanna and their Modification in the Sceletium Derived `Kougoed.' Pharm Biol 1998;36:173-9.
Bennett AC, Smith C. Immunomodulatory effects of Sceletium tortuosum (Trimesemine) elucidated in vitro: Implications for chronic disease. J Ethnopharmacol. 2018;214:134-40. doi: 10.1016/j.jep.2017.12.020. View abstract.
Bennett AC, Van Camp A, López V, Smith C. Sceletium tortuosum may delay chronic disease progression via alkaloid-dependent antioxidant or anti-inflammatory action. J Physiol Biochem. 2018;74(4):539-47. doi: 10.1007/s13105-018-0620-6. View abstract.
Gericke J, Lekhooa M, Steyn SF, Viljoen AM, Harvey BH. An acute dose-ranging evaluation of the antidepressant properties of Sceletium tortuosum (Zembrin®) versus escitalopram in the Flinders Sensitive Line rat. J Ethnopharmacol. 2022 Feb 10;284:114550. doi: 10.1016/j.jep.2021.114550. View abstract.
Harvey AL, Young LC, Viljoen AM, Gericke NP. Pharmacological actions of the South African medicinal and functional food plant Sceletium tortuosum and its principal alkaloids. J Ethnopharmacol. 2011;137(3):1124-9. doi: 10.1016/j.jep.2011.07.035. View abstract.
Hoffman JR, Markus I, Dubnov-Raz G, Gepner Y. Ergogenic effects of 8 days of Sceletium tortuosum supplementation on mood, visual tracking, and reaction in recreationally trained men and women. J Strength Cond Res 2020;34(9):2476-81. View abstract.
Meyer GMJ, Wink CSD, Zapp J, Maurer HH. GC-MS, LC-MS(n), LC-high resolution-MS(n), and NMR studies on the metabolism and toxicological detection of mesembrine and mesembrenone, the main alkaloids of the legal high "Kanna" isolated from Sceletium tortuosum. Anal Bioanal Chem. 2015;407(3):761-78. doi: 10.1007/s00216-014-8109-9. View abstract.
Nell H, Siebert M, Chellan P, Gericke N. A randomized, double-blind, parallel-group, placebo-controlled trial of Extract Sceletium tortuosum (Zembrin) in healthy adults. J Altern Complement Med. 2013;19(11):898-904. doi: 10.1089/acm.2012.0185. View abstract.
Patnala S, Kanfer I. Investigations of the phytochemical content of Sceletium tortuosum following the preparation of "Kougoed" by fermentation of plant material. J Ethnopharmacol 2009;121:86-91. View abstract.
Reay J, Wetherell MA, Morton E, Lillis J, Badmaev V. Sceletium tortuosum (Zembrin®) ameliorates experimentally induced anxiety in healthy volunteers. Hum Psychopharmacol 2020:e2753. Online ahead of print. View abstract.
Smith C. The effects of Sceletium tortuosum in an in vivo model of psychological stress. J Ethnopharmacol 2011;133:31-6. View abstract.
Smith MT, Crouch NR, Gericke N, Hirst M. Psychoactive constituents of the genus Sceletium N.E.Br. and other Mesembryanthemaceae: a review. J Ethnopharmacol 1996;50:119-30. View abstract.
Smith MT, Field CR, Crouch NR, Hirst M. The Distribution of Mesembrine Alkaloids in Selected Taxa of Kanna and their Modification in the Sceletium Derived `Kougoed.' Pharm Biol 1998;36:173-9.
Terburg D, Syal S, Rosenberger LA, et al. Acute effects of Sceletium tortuosum (Zembrin), a dual 5-HT reuptake and PDE4 inhibitor, in the human amygdala and its connection to the hypothalamus. Neuropsychopharmacology. 2013;38(13):2708-16. doi: 10.1038/npp.2013.183. View abstract.