When reheating leftover pork tenderloin, the lean meat tends to dry when overcooked. To prevent this, try reheating it in a skillet with some cooking liquid.

Reheat the meat in a skillet with some reserved cooking liquid or stock, and bring it to a simmer. The liquid prevents the meat from drying out.

Cover the skillet with a lid so the steam from the broth stays in the pan, gently warming the tenderloin to keep it extra moist and juicy while reheating.

Additionally, slicing the pork tenderloin into equally thick pieces will help the meat reheat at the same pace, and occasionally flipping the meat will heat both sides evenly.

If you prefer using a microwave, lay a damp paper towel over your sliced pork tenderloin before reheating it in 20-30 second intervals in your microwave.