GDF15 and Stroke: As a matter of comparison, while mean GDF-15 levels in young healthy adults are around 450 pg/ml (unpublished data from preliminary experiments), the mean concentrations at admission and during hospitalization in the stroke patients presented here were approximately four times higher (2,100 ± 125 at D0 and 1,886 ± 269 at D7, mean ± SEM).