I will speculate that eating liquid food for a prolonged amount of time doesn't do your teeth and gums any favors. Whether Soylent qualifies as "unnatural" dep

I will speculate that eating liquid food for a prolonged amount of time doesn't do your teeth and gums any favors. Whether Soylent qualifies as "unnatural" depends on whether its ingredients, and the amounts of them, are nutritious and not poisonous. Humanity hasn't yet reached a point where we have definite answers to questions like that.