[ad_1] <br><br>At 71, Rosenstein maintains 10% body fat and has reduced his biological age significantly. <br>[ad_2] <br> <br> <br> <br><a href="https://www.newsnationnow.com/science/reverse-biological-clock-method-jacob-rosenstein/" style="font-size: 12px;color:#D5DBDB" target="_blank">Source link </a>