The Kardashians season 5 finale saw Khloe Kardashian over the moon that she’s aging backward – kind of. Now, fans are convinced the reality TV star is “slowly morphing back to herself.” The 40-year-old completed a health test which revealed her biological age is 28. During The Kardashians season 5 final episode, Khloé was literally jumping for joy as she “beat” her sister, Kim Kardashian, at something. She told cameras she “never wins anything” and even ranked as one of the world’s slowest agers. Khloé’s celebrating her internal youth, and her fans are on hand to give her props for her outer a…