Following a joyful holiday season spent with loved ones, many people start the new year feeling sluggish—often from indulging in rich food and drinks or falling out of their workout routines.

Time for a change, said …

New scientific methods could one day render animal studies—the standard in research laboratories for more than 100 years—obsolete. Clive Svendsen, PhD, executive director of the Board of Governors Regenerative Medicine Institute at Cedars-Sinai, …