Nutraloaf: Is This Prison Food a Form of Cruel Punishment?

There are many types of reported punishments and abuse all of them harboring the physical or being restrained of, like being beaten up or being sent to the SHU. But there's another form of punishment we are all unaware of and it was only recently that we know of this type of horrendous punishment. And it comes to a form of Nutraloaf, a block of mashed up food containing all required servings within the food pyramid, designed so that prisoners get everything they need in one loaf. But with such a "bold" cause it is universally hated because it tastes horrible. Is this a still humane form of punishment or are the prisoners over reacting?
The Nutraloaf Punishment
Feeding Nutraloaf to prisoners has been a substitute for an otherwise harsher punishment such as being sent to solitary confinement or being withheld of your cheap prison calls but with the extent and nature of the punishment going either route is of the same levels. You see when an inmate has a record of bad behavior and needs he can be punishable by eating Nutraloaf for days even months. It tastes so bad even if it's made of different healthy foods. There are many ways to cook a delicious healthy meal and the Nutraloaf is not one of them. Even changing the flavor is not going to cut it out. There's a rice, oatmeal, garbanzo bean flavored version, a cheese and raisin combo and an applesauce, garlic, spinach variant. Though separately they concise a suitable meal but together they are horrible. Maybe it was the way it was made, being chemically produced and altered to accommodate mass production.
The Effects?
It's still a harsh punishment, the texture of the food, the way it feels in the tongue plus the taste is really gross. Eating something you not comfortable with in a meal is fine, but eating it for prolonged number of days is just torture, we are supposed to be happy with the nourishment we are taking in, but if you are to eat a blob square of processed food that taste blandly unexplainable it makes us gag and force ourselves not eat at all, and when we don't eat at all it affects our cognitive and behavioral actions. It alters our personalities and we become prone to sickness because we have no appetite.