One Piece
A user on Gamefaqs (OnslaughtOfGods) came up with an interesting theory. What if the candy being fed to the kids...is the same candy that is being fed to Big Mom? It would explain her enormous size and her obsession with constantly being fed the candy!
And then I thought it would also mean that the SAD factories might actually be those same candy factories, which could explain why no one seems to know about them aside from Caesar and Doffy. It would also give the SHs a reason possibly to return to FI and pick up Jinbei.
Also, think, why would Doffy be feeding Big Mom the candies? It's possible he's in league with both her and Kaido, using SAD for both purposes. Or it's possible it's a way of poisoning her so that at any moment Kaido can take over her territory by witholding the candy