SCIENTIFIC REFERENCES & SOURCES
1. Susan Mayor, “Erection Hardness Scale Proves Effective In Assessing Erection Quality”, 28 Mar 2008,
https://www.medicalnewstoday.com/articles/101961.php
2. Cohen AJ., Bartlik B., “Ginkgo biloba for antidepressant-induced sexual dysfunction” 1998 Apr-Jun
https://www.ncbi.nlm.nih.gov/pubmed/9611693
3. UroToday, Volume 3 2010, “Safety and Efficacy of the Herbal Drug Hypericum Perforatum for the Treatment of Premature Ejaculation”,
https://www.urotoday.com/volume-3-2010/vol-3-issue-3/36187-safety-and-efficacy-of-the-herbal-drug-hypericum-perforatum-for-the-treatment-of-premature-ejaculation-2229105.html
4. Chemistry of amino acids and protein structure. (n.d.)
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http://www.aidscouncil.org.au/nootropics-for-improved-sexual-performance/
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4558040/
10. Harvard Health Publishing, Harvard Medical School, “5 natural ways to overcome erectile dysfunction”
https://www.health.harvard.edu/mens-health/5-natural-ways-to-overcome-erectile-dysfunction
11. Weller, Chris, “Nitric Oxide Beads Beat Out Viagra In Treating Erectile Dysfunction”, in ”Medical Daily”, October, 2015:
http://www.medicaldaily.com/nitric-oxide-beads-beat-out-viagra-treating-erectile-dysfunction-258683
12. Gruss, William, “Nobel Prize Discovery Proves You Can Defeat Impotence Now”, in “Natural Health News Report”, May, 2012:
http://www.naturalhealthnewsreport.com/page/nhn/articles/specialreport/2012-05-15-045.html