My mother doesn't know how to keep in good health and is addicted to Buddhism. How can I persuade?
You are wrong. Your mother is well-rooted, which is her blessing. You won't lose anything if you make her believe in Buddhism. You say Buddhism is superstition, but you don't understand. Buddhism practices the heart, so your mother will get inner happiness. You won't understand without learning Buddhism. Don't stop her if you don't learn Buddhism.