I am a worrier too! I like that you actually think about all of this stuff though. I think you will relax a bit after a few years. I know I have (although I am still very cautious). Being cautious is not without merit though- it saved my bird's life a few times..
They did a study with chickens and they actually added the concentrate directly to drinking water . Eventually, it did start to show up in tissue samples (with daily consumption at high levels), but that was at SUPER high concentrations and the birds were drinking it 24/7 (sad). It didn't kill any of them, but at super high concentrations (when they were drinking it daily) it did start to show in liver tissue but their muscle tissue was okay (so that makes some sense, as the liver is the detox center)...when I say super-high, I mean basically, it would be like if I filled Noodles' water dish with my f10 mix (2 oz to 17 oz) instead of water..and high in some instances. I think that is super sad that they did this to chickens....but.....given the disease in poultry farms, it may have actually saved chickens, because antibiotics certainly impact the liver and are found in muscle tissue. I am not sure how they obtained the tissue samples, but people do eat chicken, so if they were slaughtered, I guess it's a better cause than dinner. At least the F10 didn't kill them directly.
That made me feel better, as Noodles is never going to drink it like that....
I think this was one version of the study:
https://pdfs.semanticscholar.org/1053/0d3019e48c585c999b31d806d7fd3c65b1cc.pdf
Again, it is certified for no-rinse use (as long as you are using the no-rinse/non-soap variety). This means that if your hands are dry, you are okay. Obviously I wouldn't soak my hands in the diluted spray, let them dry and then dangle them in the water dish, but if that happened a few times, it would still probably be okay.
I'll never get to this point, but these "Luvs" commercials totally remind me parrot ownership to some extent (wait for the DVR part to end-sorry, it was on there-start at 18 s for video 1):
[ame="https://youtu.be/bVAY4Aurlog?t=19"]Luvs Second Kid TV commercial (2015) - YouTube[/ame]
and this
[ame="https://youtu.be/V5fJHhxnsFI"]Luvs Commercial Bath 2017 - YouTube[/ame]