Spam I assume would need to be pushing some product or at least agenda.
A message reminding people that you can improve the resistance to basic colds/flu for a school teacher, tested on several school teachers, should be motivating for someone tired of being sick.
A large volume of today's spam doesn't sell a product at first blush - it just piques interest, just as yours did. Then those ensnared by that, the responses, get the pitch more privately.
You asked why you're getting downvoted. I'm doing you the service of explaining it's because your comment looks spammy and annoying. Take the feedback...
A message reminding people that you can improve the resistance to basic colds/flu for a school teacher, tested on several school teachers, should be motivating for someone tired of being sick.