The specific disease that comes to mind is Poly-cystic Kidney Disease.
My Grandfather, Father, and Brother all have this disease, and my great grandmother died to it. Both my father and grandfather have to survive on medical equipment because of the state of their kidneys.
Now, this disease can be controlled to a point that it never rears its ugly head. My brother, while having it, maintains a very careful diet with extremely low phosphorus and zero caffeine intake among other things.
Now, I’m no genius, but I’m assuming “the perfect diet” that Soylent provides would not cause the general overdose of phosphorus, caffiene, and the other nutrients like traditional food and drink do. Is this correct, or would something like PKD need a specially tailored formula to help neutralize the effects of PKD?