Sarsaparilla
Sarsaparilla root was one of the most famous "blood purifiers" of European and American medicine for about three centuries, and it still turns up in blood-cleanse, skin and men's tonic blends. Members get the full entry: its history, why doctors doubted it as early as the 1850s, what the research does and doesn't show, and its digoxin, lithium and kidney cautions.
