I am planning to use Endothelial Cell Growth Medium (C-22010) to grow my HUVEC. Do I have to supplement the medium with additional factors like e.g. FCS?

PromoCell's Endothelial Cell Growth Medium (C-22010) is a complete medium that can be used for the culture of HUVEC after addition of the SupplementMix. Addition of extra FCS is not necessary. The SupplementMix contains FCS (2% v/v final concentration), recombinant growth factors, hormones, and a bovine brain extract that together have mitogenic effects on endothelial cells.