I am no nutrition expert but I do have a pretty damn good track record of keeping myself alive, so I want to remind you all that "fed is best" also applies to adults. There's nothing you could eat (that has been deemed fit for human consumption, I don't mean asbestos you smartass) that would be worse for you than just straight-up not eating. No food is as bad as no food.
A protein bar isn't the best possible source of protein in your diet, but it's better than not getting that protein. Fresh fruits would be better than orange juice, but if your choices are between having the orange juice and not getting the vitamins at all, you drink the fucking orange juice.
If you were out at winter while barefoot, and your options were between wrapping random newspaper around your feet, or not having anything to protect your feet, you wouldn't think "newspapers are a worse option than proper shoes, therefore I shouldn't take this worse option" and go barefoot.
