Nutmeg is the seed, and mace the aril, of a tree native to Indonesia.  Nutmeg is used to flavour confectionery as well as many savoury and sweet dishes.  It also has some traditional medical uses, including as a treatment for diarrhoea, in high doses it has narcotic effects.  Nutmeg provides several important antioxidants, including eugenol which inhibits platelet aggregation and oleanolic acid which can lower blood lipids.  It also contains limonene which as preventative properties against some cancers, and linalool which has anticancer and antiviral effects.

Sources: Medicinal Seasonings – The Healing Power of Spices (Dr Keith Scott);