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[1] Lopresti, A.L., Drummond, P.D. and Smith, S.J., 2019. A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha (Withania somnifera) in aging, overweight males. American journal of men's health, 13(2), p.1557988319835985.
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[5] Pandit, S., Biswas, S., Jana, U., De, R.K., Mukhopadhyay, S.C. and Biswas, T.K., 2016. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia, 48(5), pp.570-575.
[6] Pandit, S., Biswas, S., Jana, U., De, R.K., Mukhopadhyay, S.C. and Biswas, T.K., 2016. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia, 48(5), pp.570-575.
[7] Prasad, A.S., Mantzoros, C.S., Beck, F.W., Hess, J.W. and Brewer, G.J., 1996. Zinc status and serum testosterone levels of healthy adults. Nutrition, 12(5), pp.344-348.
[8] Wessells, K.R. and Brown, K.H., 2012. Estimating the global prevalence of zinc deficiency: results based on zinc availability in national food supplies and the prevalence of stunting. PloS one, 7(11), p.e50568.
[9] Croxford, T.P., McCormick, N.H. and Kelleher, S.L., 2011. Moderate zinc deficiency reduces testicular Zip6 and Zip10 abundance and impairs spermatogenesis in mice. The Journal of nutrition, 141(3), pp.359-365.
[10] Excoffon, L., Guillaume, Y.C., Woronoff-Lemsi, M.C. and André, C., 2009. Magnesium effect on testosterone–SHBG association studied by a novel molecular chromatography approach. Journal of pharmaceutical and biomedical analysis, 49(2), pp.175-180.
[11] Maggio, M., De Vita, F., Lauretani, F., Nouvenne, A., Meschi, T., Ticinesi, A., Dominguez, L.J., Barbagallo, M., Dall’Aglio, E. and Ceda, G.P., 2014. The interplay between magnesium and testosterone in modulating physical function in men. International journal of endocrinology, 2014.
[12] Naghii, M.R., Mofid, M., Asgari, A.R., Hedayati, M. and Daneshpour, M.S., 2011. Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines. Journal of trace elements in medicine and biology, 25(1), pp.54-58.
[13] Cui, Y., Winton, M.I., Zhang, Z.F., Rainey, C., Marshall, J., De Kernion, J.B. and Eckhert, C.D., 2004. Dietary boron intake and prostate cancer risk. Oncology reports, 11(4), pp.887-892.
[14] Barranco, W.T. and Eckhert, C.D., 2004. Boric acid inhibits human prostate cancer cell proliferation. Cancer letters, 216(1), pp.21-29.
[15] Fonseca, F.A.H. and Izar, M.C.D.O., 2016. High-sensitivity C-reactive protein and cardiovascular disease across countries and ethnicities. Clinics, 71(4), pp.235-242.
[16] Maggio, M., Basaria, S., Ble, A., Lauretani, F., Bandinelli, S., Ceda, G.P., Valenti, G., Ling, S.M. and Ferrucci, L., 2006. Correlation between testosterone and the inflammatory marker soluble interleukin-6 receptor in older men. The Journal of Clinical Endocrinology & Metabolism, 91(1), pp.345-347.
[17] Wehr, E., Pilz, S., Boehm, B.O., März, W. and Obermayer‐Pietsch, B., 2010. Association of vitamin D status with serum androgen levels in men. Clinical endocrinology, 73(2), pp.243-248.
[18] Tak, Y.J., Lee, J.G., Kim, Y.J., Park, N.C., Kim, S.S., Lee, S., Cho, B.M., Kong, E.H., Jung, D.W. and Yi, Y.H., 2015. Serum 25-hydroxyvitamin D levels and testosterone deficiency in middle-aged Korean men: a cross-sectional study. Asian Journal of Andrology, 17(2), p.324.
[19] Van Hemelrijck, M., Michaelsson, K., Nelson, W.G., Kanarek, N., Dobs, A., Platz, E.A. and Rohrmann, S., 2013. Association of serum calcium with serum sex steroid hormones in men in NHANES III. The Aging Male, 16(4), pp.151-158.
[20] Rhéaume-Bleue, K., 2013. Vitamin K2 And The Calcium Paradox. Toronto, Ontario: HarperCollins Publishers, p.20.
[21] Maresz, K., 2015. Proper calcium use: vitamin K2 as a promoter of bone and cardiovascular health. Integrative Medicine: A Clinician's Journal, 14(1), p.34.