Exactly. The immune system, like the muscles and the brain, can grow stronger with use... This makes sense, but is it true? Without statistically significant

Exactly. The immune system, like the muscles and the brain, can grow stronger with use... This makes sense, but is it true? Without statistically significant evidence to back this up, we don't know for sure if it is true. It could also make sense that we are stuck with our immune systems like I am stuck being 6'3" tall. I get the feeling that a lot of pseudo-scientific "natural" cures use a lot of common sense arguments, but have never gone down the scientific rabbit hole to make sure that the cure has been scientifically shown to be effective.