It's like the fat % on my bathroom scale. I know it's not perfect (in fact body % measuring is incredibly hard with massive error margins even in the most expen

It's like the fat % on my bathroom scale. I know it's not perfect (in fact body % measuring is incredibly hard with massive error margins even in the most expensive/intrusive tests) but I'm not looking for exacts, I'm looking for trends and I've seen them where I expected to. So yes, the % may be bogus but I can use all that data to see trends which is all that matters (to me).