Chemicals are not currently tested for their endocrine disruption potential before they are approved for use and enter our environment, and there are endocrine disruptors in a vast array of products we come into contact with every day, including organochlorine pesticides, plastics, fuels, and other industrial chemicals.
There's not really a ban on the KIA bracelet specifically. There are regulations for wearing the uniform and specifically jewelry, and Marines are not allowed to wear bracelets. This falls under that spectrum. Now, the KIA bracelet will be lumped into the same category as the POW/MIA bracelets, which are approved for wear.
I think my faith as a Muslim is very important. One of the core values is that you are always trying to build consensus. So when it comes to figuring out if something is permissible or not in Islam, it's usually a discussion, and people have to come to a consensus in order for something to be approved.