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1 Restoring youth with tongkat ali

2 Worldwide tongkat ali shortage

3 Tongkat ali to increase libido

4 Cleaning up scams on the tongkat ali market

5 Evaluating drugs

6 Absolutely legitimate

7 Engineering happiness

8 Biology of behavior

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1 Mahanem Mat Noor, Abu Hassan Shaari Mohd Nor, Lukman Che Hassan, The Effect of Eurycoma Longifolia Jack (Tongkat ali) on Sexual Behavior and Sperm Quality in Rats, Malaysian Journal of Pharmaceutical Sciences, vol.2, No.1, pp 53-60 (2004).

2 Catherine Ulbricht, Julie Conquer, Kelly Flanagan, Richard Isaac, Erica Rusie, and Regina C. Windsor, An Evidence-Based Systematic Review of Tongkat Ali (Eurycoma longifolia) by the Natural Standard Research Collaboration, Informa Healthcare,Journal of Dietary Supplements Vol. 10, No. 1 , Pages 54-83 March 2013.

3 Effects ofEurycoma longifolia Jack on laevator ani muscle in both uncastrated and Testosterone-Stimulated castrated intact male rats, Pharmaceutical Society of Korea Archives of Pharmacal Research Volume 24, Issue 5, pp 437-440 October 2001.