Ferro-China—a variety of amaro fortified with iron salts—was originally developed in the 1800s by Dr. Ernesto Baliva as a medicine to combat the rising number of cases of anemia among Italians (ferro comes from the Latin ferrum, for "iron"). The "China" in the name comes not from the country, but from the addition of quinine-rich cinchona bark. Don Ciccio & Figli, a Washington D.C.-based distiller with roots in Italy's Amalfi Coast, makes a range of amari and cordials inspired by family recipes that date back to the 1880s. Amaro delle Sirene is their signature amaro, but Amaro Tonico Ferro-Kina, a rare iron-citrate-based amaro similar to an Italian Ferro-China, is their more unique offering. The liqueur's most predominant flavor note is iron, but it also has hints of lemon, cinchona, and gentian.