Wow. This raises great points that I confess I'd never thought of when I put one of my characters into a sarcophagus because he had a mysterious, incurable, and fatal brain ailment. The effects on him were curing of the brain disease, plus some additional side benefits: more energy, improved stamina, reversal of age-related arthritic changes in his knees and so on. Afterward, I had him monitored by the medical staff for any sign that he might be Turning Evil, which was the major side effect of repeat trips into the machine. Other than the mysterious brain disease and normal aging, my character was a healthy guy. I didn't stop to consider whether the machine might have restored his foreskin or put his wisdom teeth back in his jaw--I just assumed it would not. My theory is that the sarcophagus uses the individual as the template and is able to distinguish between cosmetic changes and illness.
no subject