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Be skeptical of any product claimed to be effective against a wide range of unrelated diseases. There is no such thing as a panacea or "cure-all."
Ignore appeals to your vanity. One of a pseudo-master's most powerful appeals is the suggestion to "think for yourself" instead of following the collective wisdom of the community. A similar appeal is the idea that although something has not been proven to work for other people, it still might work for you.