One way that I saw that bone broth was actually making an impact, nutritionally, was a while back when I was using pH strips to test my morning urine. Based on the rec of my HCP, I'd tweaked the amount of a multi-mineral supp (mostly cal and mag, a variety of other stuff that I think was good/helpful but not affecting this in particular) and I saw that the day after I ate a lot of soup, the pH of my urine would change in the same way as if I took an extra cal/mag pill. I played around with it a few times, it was repeatable. And I agree with Theloose, I don't count on bone broth for magnesium, and often I find that stresses on my body deplete mag faster than cal anyway, so a stand-alone there is helpful for me, I just vary the amount.Â
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I haven't tested this, but I think cell salts help enough with absorption that they would noticeably help--I've seen symptomatic change when I take (or skip) bioplasma that are what I used to see when I'd increase my supps. It's the only supp I've taken that has actually saved us money by decreasing the amount of other things we need to supplement.Â
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eta: I didn't realize this was so old. But I came back to say, I think overall amounts of supps aren't just dependent on current needs (though the needs of pregnancy or nursing are quite real) but needs can be longer-term too, more if you're working on long-term health issues, less if you're feeling ok/good and just trying to do better.