The efficacy and functions of Rhizoma Drynariae

Drynaria fortunei is a tonic Chinese herbal medicine, belonging to the rhizome of Drynaria roosii from the Polypodiaceae family. Also known as Yajiang, Yanlianjiang, or Payanjiang, it is primarily used for nourishing the liver and kidneys, strengthening tendons and bones, promoting bone and tendon healing, invigorating blood circulation, regulating qi, stopping bleeding, and relieving pain. Specific functions are analyzed as follows:

1. Nourishing Liver and Kidneys: Drynaria fortunei is believed to tonify the liver and kidneys. In traditional Chinese medicine (TCM), the liver stores blood and the kidneys store essence; thus, strengthening these organs helps maintain reproductive health and can improve conditions caused by kidney deficiency or insufficiency of liver and kidney function. It may be beneficial for certain male sexual dysfunctions and female infertility issues.

2. Strengthening Tendons and Bones: Drynaria fortunei is used to strengthen tendons and bones, thereby improving skeletal health. It may play a role in treating osteoporosis, fractures, and joint disorders.

3. Promoting Bone and Tendon Healing: This is another traditional use of Drynaria fortunei. It is believed to accelerate fracture healing and recovery, while also helping maintain elasticity and flexibility of tendons and bones.

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4. Invigorating Blood and Regulating Qi: Drynaria fortunei is used to break up stagnant blood and regulate qi flow, thereby improving blood circulation. It may help manage conditions related to poor circulation, such as blood stasis and thrombosis.

5. Stopping Bleeding and Relieving Pain: Drynaria fortunei is also used to stop bleeding and alleviate pain. It can help reduce hemorrhage, pain, and inflammation, potentially benefiting the treatment of external injuries and gynecological conditions.

It should be noted that Drynaria fortunei, as a Chinese herbal medicine, should only be used under the guidance of a physician or licensed TCM practitioner to ensure proper dosage and administration. Additionally, it may interact with certain medications, so caution is advised during use. Do not self-medicate with Drynaria fortunei as a substitute for conventional medical treatment, especially for serious illnesses.