Board Thread:Theories and Speculation/@comment-1512913-20150520114510/@comment-1512913-20150520134204

Hashirama stuff that Madara produced is white for some reason, just like the Zetsu. So maybe Gedo Mazo affected Hashirama's cells too not just the cells affecting the Zetsu. One could say White Zetsu and Hashirama's cells are synonymous maybe.