This is a list of the scientific studies on the various components of the XanthoRx formula. These studies serve to validate the effectiness and sound scientifc principles on which the XanthoRx formula was based. No other product in the world has this level of clinical data and scientific research to back up their product as XanthoRx. A quick review of this data makes it easy to understand why XanthoRx is the world leader in natural male enhancement. Almada, Anthony BSc MSc (2002) “Appliance of Science: Nitric Oxide gets blood flowing.”  Functional Foods & Nutraceuticals. Antoniou, Dr. L.D. et al. (1977) “Reversal of uraemic impotence by zinc.” Lancet; 2 (8044): 895-8. Bondil, Dr. P. et al. (1992). “Clinical study of the longitudinal deformation of the flaccid penis and its variations with aging.” European Journal of Urology; 21 (4): 284-6 Burnett, Dr. A. (1997) “Nitric Oxide in the penis: Physiology and Pathology,” Journal of Urology: 157, 320. Cappiello, A. et al., “Yohimbe augmentation of fluvoxamine in refractory depression: A single-blind study.” Biol Psychiatry (1995), 38: 765-67 Chen J, Chio WF, Chen CC, Chen CF: "Effect of the plant-extract osthole on the relaxation of rabbit corpus cavernosum tissue in vitro." J Urology 2000 Jun; 163 (6) :1975-80. Chio We, et al. "Vasorelaxing effect of coumarins from Cnidium monnieri on corpus cavernosum." Planta Medica 67: 282-284, 2001. Ernst, E., and M.H. Pittler, (1998) “Yohimbie for erectile dysfunction: a systematic review and meta-analysis of randomized clinical trials,” Journal of Urology 159 (2): 433-36 Ignarro, Dr. Louis J. “Nitric Oxide Biology and Pathobiology.” Academic Press (2000). Ito, Dr. T., Kawahara, Dr. K, et al (1998). “The effects of Arginmax, a natural dietary supplement for enhancement of male sexual function.” Hawaii Medical Journal. Lebret, Dr. T. et al (2002) “Efficacy and safety of a novel combination of L-Arginine Glutamate and Yohimbine Hydrochloride: A new oral therapy for Erectile Dysfunction.” European Journal of Urology. 41: 608-13. Mitka, Mike (1998) “1998 Nobel Prize Winners are Announced: Three Discoverer’s of Nitric Oxide Activity.” Journal of the American Medical Association, 280: 19 Morris, PhD. Sidney J. “Regulation of Arginine Availability and its Impact on NO Synthesis” (1999). Raghavan SAV, Dikshit M., “L-Citrulline mediated relaxation in the control and lipopolysaccharide-treated rat aortic rings.” European Journal of Pharmacol (in press) Rowland, Dr. D.L., (1997) “Yohimbe, erectile capacity, and sexual response in men,” Archives of Sexual Behavior, 26 (1): 49-62 Ruiz, Dr. E., Tejerina Dr. T., (1998) “Relaxant effects of L-Citrulline in rabbit vascular smooth muscles.” Br Journal of Pharmacol, 125:186-92 Susset, Dr. J.G., et al., (1989) “Effect of yohimbine hydrochloride on erectile impotence: A double-blind study, “Journal of Urology, 141 (6): 1360-63. Teichman, Dr. Joel M.H. (2001) “Urology 20 Common Problems”; 266 Tenover, J.S. (1992). “Effects of testosterone supplementation in the aging male.”  Journal of Clinical Endocrinology and Metabolism; 75 (4): 1092-8. Viktorov, I., D. Kaloyanov, Al. Lilov, L. Zlatanova, V. Kasabov. (1982) “Clinical investigation on Tribestan in males with disorders in the sexual function MBI.” Waugh, W., Daeschner, W., Files, B. McConnel and Strandiord, S. “Oral Citrulline as Arginine Precursor,”  Journal National Medical Association ( in press 2001 ) Zheng, BL, et al. “Effect of a lipidic extract from lepidium meyenii on sexual behavior in mice and rats.” Journal of Urology. 55 (4): 598-602, 2000