A new study confirms that the human sirtuin protein known as SIRT1, which has been shown to combat age-related diseases in many animals, can be directly activated by resveratrol—a natural compound found in the skin of grapes used to make red wine. Resveratrol is one of many so-called sirtuin-activating compounds, or STACs.

Researchers have figured out a way to grow a ready-made supply of blood vessels for transplant into patients undergoing heart surgery, reports a new study in the journal Science Translational Medicine.

The blood vessels, or “vascular grafts,” can be made ahead of time, so surgeons can grab them off the shelf when patients need them. Until now, no other vascular graft engineered from human tissue has tolerated simple storage.