Common Content problem

I created a blog with 60 articles about resveratrol, the titles for each article were different questions that people ask about the product. When finished I scanned the website with siteliner.com and common content was 20%, It would be great if you can somehow create a system for repeated text. The articles where about different questions with a common product "resveratrol" and kept writing the same headlines like what is resveratrol?