The Morinda Combination Formula, also known as Ba Ji Yin Yang Wan (巴戟阴阳丸), is a traditional Chinese medicine (TCM) formula used to tonify the kidney Yin and Yang, strengthen the bones and muscles, and improve overall vitality. It is often employed for conditions of kidney deficiency, which may involve both Yin and Yang aspects. Functions (功效): Tonifies kidney Yin and kidney Yang (滋补肾阴阳). Strengthens the bones, muscles, and lower back (强筋壮骨). Warms and invigorates kidney Yang to restore vitality (温补肾阳). Nourishes kidney essence and blood (滋补精血). Indications (适应症): This formula is suitable for conditions caused by kidney Yin and Yang deficiency, which often manifest with symptoms such as: Lower back pain and weakness Cold sensations in the lower body Fatigue, lack of energy, and weakness of the knees Reduced libido, erectile dysfunction, or premature ejaculation Frequent urination, nighttime urination (nocturia) Tinnitus or hearing loss Pale complexion or dizziness Irregular menstruatio