“…Moreover, several published experiments challenging and validating a biological equivalency of 65% for DL-OH-Met (equivalent to 73% on molar basis) compared to DL-Met (100%) in poultry should have been considered in the discussion ( Hoehler et al, 2005 ; Payne et al, 2006 ; Santos Viana et al, 2009 ; Agostini et al, 2017 ; Lingens et al, 2021 ).…”