Just can't understand! 170 posts and ZERO traffic, what wrong?

You aren't using blackhat, that's what's wrong.

The problem is not how many posts you have. It is HOW do you market your products/ your post to users.

WTF. I thought he forgot to write something. Lol. Maybe that is your problem? You used black font against a black background on your site? Lol.\

Seriously speaking the health niche is so saturated these days that you might need something different to attract people.