Which of these brings more traffic to your blog?

[Scott]

I always suggest going after realistic long tail targets. Yes the search frequency is less, but your ability to rank for those targets will be much higher, especially if you have a relatively new or low performing website.

If you have a weight loss website, good luck. It is one of the most competitive online markets and most difficult for SEO - My SEO firm does not even work on weight loss based sites due to a very high failure rate given most owners extremely low budgets.

If you want your website to rank for "weight loss" you will likely need full time employees working on this with a very high budget (minimum 5 figures monthly).

Long tail is the way to go.