Silver nanopartcles can turn the skin to the blue colore but they are non toxic. While other chemicals, each one depends on its own toxicity.

i know that , my question is : is it possible for green nanoparticles from Carob leaves extract to be more toxic than chemical ones ?

Hello Amr Mahmoud,

I used a dose of silver nanoparticles extract in rat through oral feeding and observed no abnormality. From that point it seem to me that sliver nanoparticles are not toxic or less toxic than other chemicals.