Hop rho iso-alpha acids, berberine, vitamin D3 and vitamin K1 favorably impact biomarkers of bone turnover in postmenopausal women in a 14-week trial - Holick, M F; Lamb, J J; Lerman, R H; Konda, V R; Darland, G; Minich, D M; Desai, A; Chen, T C; Austin, M; Kornberg, J; Chang, J L; Hsi, A; Bland, J S; Tripp, M L (J Bone Miner Metab, 2010)