That looks like the thing. I would love to have it tested independently if I'm going to keep it in my mouth every night for the rest of my life. (And I'm now afraid not to).
Bruxism is bad enough that I’d wager it outweighs any damage from the microplastics. We know people live with microplastics now, whereas bruxism will gradually destroy your joints, teeth, gums, and stress your muscles.
But apart from the guard there are some things you can do to reduce it. There’s apnea testing, and also things you can wear to monitor it and get biofeedback. Also stress reduction, quitting alcohol/caffeine/chcocolate, some jaw exercises (rocabado), massage, physio, jaw alignment and teeth alignment, etc
