I was never diagnosed with fluoroquinolone toxicity. Doctors don't really acknowledge it. The best you'd be able to do is a muscle biopsy, if you were able to convince.

With my heart we have echocardiograms from before and after the antibiotics and it went from normal with good parameters to abnormal with questionable parameters. Things like E/A reversal, a large increase in deceleration time, and a significant decrease in mitral valve bloodflow velocities. These are tell-tale signs that your heart is starting to struggle that usually aren't seen until like middle aged diabetics or later on for non-diabetics. But I'm 32, and previously above average fitness.

Likewise the food sensitivity reactions are mostly diagnosis by symptoms. I've had a mild elevation in tryptase during a reaction but everything else has largely been normal.

I used to take supplements but they never really seemed to do much. When I took things I needed because of malnutrition there were improvements but that was about it. Subjectively I would say I felt more energetic while on B complex and L-Carnitine but I eventually developed a sensitivity to those medications, as I do with anything I continually intake, because my immune system's mechanism of tolerance has been disrupted by the antibiotics (and maybe something genetic who knows).