• These herbs are used to nourish Yin, produce body fluids, and moisten dryness.
• They are often combined with herbs that clear deficiency heat.
• Since many of these herbs are moist and cool, caution should be taken in cases of spleen Qi deficiency or accumulation of dampness in the middle Jiao.
• Wei Li: Yin tonics are an important component in herbal formulas for lowering diastolic blood pressure and controlling hyperthyroidism.