Background
In TCM, xuè xū (blood deficiency) does not mean anemia. It describes a broader pattern of insufficient nourishment reaching the tissues — a pale complexion, dizziness, brittle nails, dry hair, and a sense that the body's "reservoir of moistening substance" is running low. A person can have xuè xū without being anemic by lab standards, and conversely, anemia is only one possible expression of what TCM calls blood deficiency. Danggui Buxue Wan is the classic two-herb formula that embodies the principle "qi generates blood"; Guipi Wan addresses blood deficiency that arises when the spleen (the TCM concept, not the anatomical organ) fails to produce enough blood and the heart fails to house it. These two formulas bridge the women's-health and stress concerns — blood deficiency shows up wherever tissue nourishment and emotional anchoring intersect.