Amazon: Reusing of Content on Multiple Post

Hello everyone, I'm in the process of creating an Amazon Niche Site, and I have several articles ready. I have a paragraph (content) that links to other pages in the website and I want to put it at the end of all the article post I create. But I'm not sure if this is something that will not help my site rank, since essential I'll be repeating that last part of the article to all my post. Can someone help me out whit this? Thank you.

I think you need to have each article have a different ending.

Thank you for your input LoftPower.