Caveat: I'm a hippie, but I'm a science-lovin' hippie. If I can't find a study at least somewhat proving the existence of something, I tend to be skeptical.
I'm not sure that the "toxins" associated with massage (and I have had massage therapists or chiropractors tell me similar things) are actually an evidence-based thing. When you ask for more details people tend to be really short on them. I mean, really... what <i>sort</i> of toxins?
I did a bit of googling just now, and it seems that the "toxins" you could actually get due to massage are either stuff like simple lactic acid (which of course your muscles also produce after working out!) or myoglobin, which is a protein in muscle that gets released into the bloodstream when muscle is injured. So I guess in a pretty intense massage you theoretically could get significant amounts of myoglobin in the bloodstream, which theoretically could be bad for your kidneys. But I find it super-hard to believe, I'm sorry, that a regular massage could damage ENOUGH muscle for this to be a factor. And I have no idea if the myoglobin could end up in breast milk in significant amounts.
Massage, in my opinion, is really good for you! But not because it removes toxins or anything, just because it feels good and de-stresses and helps you relax, and THAT is terrific for your mental and physical health.
I am not a scientist, just a curious mama. I would have no issues getting a massage. If I were extremely concerned about the hypothetical myoglobin situation, I think I would just get an ordinary relaxing massage and avoid serious deep tissue work.
