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4 Burnett, A. L. (2006), The Role of Nitric Oxide in Erectile Dysfunction: Implications for Medical Therapy. The Journal of Clinical Hypertension, 8: 53-62. doi:10.1111/j.1524-6175.2006.06026.x
5 S Soni, Nitric Oxide‐Releasing Polymeric Microspheres Improve Diabetes‐Related Erectile Dysfunction, Journal of Sexual Medicine, 2013(10)8:1914-25
6 KM Zelman, The Truth About Maca and Your Libido: Can this Peruvian herb improve your sex life?, WebMD.com; accessed 7/18/2018
7 https://examine.com/supplements/ashwagandha/
8 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
9 https://examine.com/supplements/tribulus-terrestris/
10 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
11 https://examine.com/supplements/ashwagandha/
12 M Stone, et al. A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen. J Ethnopharmacol. 2009 Dec 10;126(3):574-6. doi: 10.1016/j.jep.2009.09.012. Epub 2009 Sep 23. PubMed PMID: 19781622
13 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
14 https://www.livestrong.com/article/408424-niacin-anxiety/
15 N Singh, et al. An Overview on Ashwagandha: A Rasayana (Rejuvenator) of AyurvedaAfrican Journal of Traditional, Complementary, and Alternative Medicines. 2011;8(5 Suppl):208-213. doi:10.4314/ajtcam.v8i5S.9.
16 https://examine.com/supplements/ashwagandha/
17 KM Zelman, The Truth About Maca and Your Libido: Can this Peruvian herb improve your sex life?, WebMD.com; accessed 7/18/2018
18 GF Gonzales, et al. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia. 2002 Dec;34(6):367-72. PubMed PMID: 12472620.
19 M Stone, et al. A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen. J Ethnopharmacol. 2009 Dec 10;126(3):574-6. doi: 10.1016/j.jep.2009.09.012. Epub 2009 Sep 23. PubMed PMID: 19781622
20 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
21 Sarsaparilla, drugs.com, 11 Oct. 2017
22 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 125
23 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 125
24 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5422695/
25 https://examine.com/supplements/zinc/
26 AH Colagar, et al. Zinc levels in seminal plasma are associated with sperm quality in fertile and infertile men. Nutr Res. 2009 Feb;29(2):82-8. doi: 10.1016/j.nutres.2008.11.007. PubMed PMID: 19285597.
27 R Shamloul, Natural aphrodisiacs. J Sex Med. 2010 Jan;7(1 Pt 1):39-49. doi:10.1111/j.1743-6109.2009.01521.x. Epub 2009 Sep 30. Review. PubMed PMID:19796015.
28 https://examine.com/supplements/muira-puama/
29 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 120
30 https://www.mayoclinic.org/drugs-supplements-l-arginine/art-20364681
31 https://www.webmd.com/vitamins/ai/ingredientmono-875/l-arginine
32 https://www.drugs.com/npc/guarana.html
33 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 115
34 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 113
35 Jang, Dai-Ja et al. “Red Ginseng for Treating Erectile Dysfunction: A Systematic Review.” British Journal of Clinical Pharmacology 66.4 (2008): 444–450. PMC. Web. 2 Aug. 2018.
36 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 106
37 ZC Xin. Effects of Icarin on erectile dysfunction. Personal Communication & Lecture at Institute of Urology, Peking University, Beijing, China. 2011.
38 https://www.webmd.com/men/horny-goat-weed-epimedium
39 Bode AM, Dong Z. The Amazing and Mighty Ginger. In: Benzie IFF, Wachtel-Galor S, editors. Herbal Medicine: Biomolecular and Clinical Aspects. 2nd edition. Boca Raton (FL): CRC Press/Taylor & Francis; 2011. Chapter 7. Available from: https://www.ncbi.nlm.nih.gov/books/NBK92775/
40 Database File for Catuaba (Erythroxylum catuaba), http://www.rain-tree.com/catuaba.htm
41 Lim PHC. Asian herbals and aphrodisiacs used for managing EDTranslational Andrology and Urology. 2017;6(2):167-175. doi:10.21037/tau.2017.04.04.
42 MM Campos, et al. Antidepressant-like effects of Trichilia catigua (Catuaba) extract: evidence for dopaminergic-mediated mechanisms. Psychopharmacology (Berl). 2005 Oct;182(1):45-53. Epub 2005 Sep 29. PubMed PMID: 15991001.
43 Database File for Catuaba (Erythroxylum catuaba), http://www.rain-tree.com/catuaba.htm
44 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 114
45 Lim, P. H. C. (2017). Asian herbals and aphrodisiacs used for managing EDTranslational Andrology and Urology6(2), 167–175. http://doi.org/10.21037/tau.2017.04.04
46 https://examine.com/supplements/tribulus-terrestris/
47 GF Gonzales, et al. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia. 2002 Dec;34(6):367-72. PubMed PMID: 12472620.
48 M Stone, et al. A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen. J Ethnopharmacol. 2009 Dec 10;126(3):574-6. doi: 10.1016/j.jep.2009.09.012. Epub 2009 Sep 23. PubMed PMID: 19781622
49 ZC Xin. Effects of Icarin on erectile dysfunction. Personal Communication & Lecture at Institute of Urology, Peking University, Beijing, China. 2011.
50 AH Colagar, et al. Zinc levels in seminal plasma are associated with sperm quality in fertile and infertile men. Nutr Res. 2009 Feb;29(2):82-8. doi: 10.1016/j.nutres.2008.11.007. PubMed PMID: 19285597.
51 https://examine.com/supplements/muira-puama/
52 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 120
53 MM Campos, et al. Antidepressant-like effects of Trichilia catigua (Catuaba) extract: evidence for dopaminergic-mediated mechanisms. Psychopharmacology (Berl). 2005 Oct;182(1):45-53. Epub 2005 Sep 29. PubMed PMID: 15991001.
54 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 114
55 https://examine.com/supplements/tribulus-terrestris/
56 https://www.livestrong.com/article/408424-niacin-anxiety/
57 https://www.mayoclinic.org/drugs-supplements-l-arginine/art-20364681
58 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 106
59 Bode AM, Dong Z. The Amazing and Mighty Ginger. In: Benzie IFF, Wachtel-Galor S, editors. Herbal Medicine: Biomolecular and Clinical Aspects. 2nd edition. Boca Raton (FL): CRC Press/Taylor & Francis; 2011. Chapter 7. Available from: https://www.ncbi.nlm.nih.gov/books/NBK92775/
60 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 114
61 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
62 AH Colagar, et al. Zinc levels in seminal plasma are associated with sperm quality in fertile and infertile men. Nutr Res. 2009 Feb;29(2):82-8. doi: 10.1016/j.nutres.2008.11.007. PubMed PMID: 19285597.
63 https://examine.com/supplements/muira-puama/
64 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 120
65 Jang, Dai-Ja et al. “Red Ginseng for Treating Erectile Dysfunction: A Systematic Review.” British Journal of Clinical Pharmacology 66.4 (2008): 444–450. PMC. Web. 2 Aug. 2018.
66 ZC Xin. Effects of Icarin on erectile dysfunction. Personal Communication & Lecture at Institute of Urology, Peking University, Beijing, China. 2011.
67 Lim PHC. Asian herbals and aphrodisiacs used for managing EDTranslational Andrology and Urology. 2017;6(2):167-175. doi:10.21037/tau.2017.04.04.
68 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 114
69 https://examine.com/supplements/tribulus-terrestris/
70 https://examine.com/supplements/ashwagandha/
71 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
72 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 115
73 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 120
74 MM Campos, et al. Antidepressant-like effects of Trichilia catigua (Catuaba) extract: evidence for dopaminergic-mediated mechanisms. Psychopharmacology (Berl). 2005 Oct;182(1):45-53. Epub 2005 Sep 29. PubMed PMID: 15991001.
75 https://examine.com/supplements/tribulus-terrestris/
76 https://examine.com/supplements/ashwagandha/
77 KM Zelman, The Truth About Maca and Your Libido: Can this Peruvian herb improve your sex life?, WebMD.com; accessed 7/18/2018
78 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 125
79 https://www.drugs.com/npc/guarana.html
80 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 115
81 https://examine.com/supplements/ashwagandha/
82 M Stone, et al. A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen. J Ethnopharmacol. 2009 Dec 10;126(3):574-6. doi: 10.1016/j.jep.2009.09.012. Epub 2009 Sep 23. PubMed PMID: 19781622
83 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
84 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 114
85 https://examine.com/supplements/tribulus-terrestris/
86 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 125
87 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 120
88 https://examine.com/supplements/zinc/
89 https://examine.com/supplements/ashwagandha/
90 Lim PHC. Asian herbals and aphrodisiacs used for managing ED. Translational Andrology and Urology. 2017;6(2):167-175. doi:10.21037/tau.2017.04.04.
91 AH Colagar, et al. Zinc levels in seminal plasma are associated with sperm quality in fertile and infertile men. Nutr Res. 2009 Feb;29(2):82-8. doi: 10.1016/j.nutres.2008.11.007. PubMed PMID: 19285597.
92 https://examine.com/supplements/tribulus-terrestris/
93 T Zenico, et al. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia. 2009 Apr;41(2):95-9. doi: 10.1111/j.1439-0272.2008.00892.x. PubMed PMID: 19260845.
94 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5422695/
95 R Shamloul, Natural aphrodisiacs. J Sex Med. 2010 Jan;7(1 Pt 1):39-49. doi:10.1111/j.1743-6109.2009.01521.x. Epub 2009 Sep 30. Review. PubMed PMID:19796015.
96 PA Balch, Prescription for Nutritional Healing, Fifth Edition, 2010, pg. 113
97 MM Campos, et al. Antidepressant-like effects of Trichilia catigua (Catuaba) extract: evidence for dopaminergic-mediated mechanisms. Psychopharmacology (Berl). 2005 Oct;182(1):45-53. Epub 2005 Sep 29. PubMed PMID: 15991001.
98 https://examine.com/supplements/tribulus-terrestris/
99 https://examine.com/supplements/tribulus-terrestris/

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DISCLAIMER: Talk to your doctor or health care provider to determine if Lexitrol Ultimate™ is right for you and is safe to take with your current prescriptions, medications, and health conditions. Do not take Lexitrol Ultimate™ in conjunction with other medications for erectile dysfunction or that relax your blood vessels, as this could cause an unsafe drop in blood pressure. Do not start or stop any prescribed medication or treatment without first consulting your doctor or health care provider.