How many times would the words 'for sale' appear on your pages?

Better to think up new ways to imply 'fat burner' so that by inference the search engines would relate them to 'fat burner.'

Huh?

How many synonym phrases can you invent, derive or construe from your key phrase? Use them to populate the implication all over your site, and let the SEs infer that they all mean the same thing, which leads right back to you.