CHINNAPPAN, S. M.; GEORGE, A.; PANDEY, P.; NARKE, G.; CHOUDHARY, Y. K. Effect of Eurycoma longifolia standardised aqueous root extract– Physta® on testosterone levels and quality of life in ageing male subjects: a randomised, double-blind, placebo-controlled multicentre study. Food & Nutrition Research, v. 65, 19 May 2021.