According to Susanna Kim of ABC News, between 1910 and 2010, dividend yield and dividend growth represented 90% of stockholders' nominal returns. Dividends really are the "X factor" that can alter your retirement and investing strategy, allowing you to use this "free money" and time to compound your gains.

While dividend stocks themselves can be a dime a dozen, finding quality companies that have sustainable, growing, and meaningful payouts can often be a challenge. It's even more difficult for health care-focused investors since so few companies within the sector offer a regularly growing dividend.

Today, we're going to look at five Dividend Aristocrats which are considered to the be the cream of the crop within the health care sector. We'll examine what makes these stocks tick and why Medtronic (MDT 0.57%), Walgreen (WBA 1.99%), Abbott Laboratories (ABT 0.43%), Becton, Dickinson (BDX 0.41%), and Johnson & Johnson (JNJ 0.59%) should be on every income investors' radar.