Yes, it will shorten your life by 18 years, make your hair fall out and make you sterile. Just like my old tritium watch. Oh wait! None of those things happened.
ie, stop giving in to hysteria and paranoia.
And if you are still worried, just move along and skip owning anything with Bluetooth. Your diet is likely more dangerous to your health (for the average person. hardly anyone eats in a "political correct" fashion) than owning/wearing a smartwatch.