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Recommended by holistic veterinarians, Herbsmith Rx Sound Tendon is a Traditional Chinese Veterinary Medicine (TCVM) herbal formula that tonifies Liver Yin, nourishes Liver Blood, and strengthens the Kidney to restore strength, resilience, and flexibility to the tendons, ligaments, and sinews. In TCVM, the Liver governs the sinews, including tendons, ligaments, and fibrous connective tissue; when Liver Yin or Liver Blood become deficient, the sinews lose their moisture and nourishment and become brittle and inelastic, predisposing them to stiffness, microinjury, and fiber tearing under the concussive and tensile forces of athletic work. Sound Tendon's eleven-herb formula nourishes Liver Blood and Yin, tonifies Kidney Yang to strengthen the structural foundation of the sinews, and activates Blood circulation to ensure the nourishment reaches the tendons and ligaments. This formula is appropriate for sport horses and performance horses recovering from tendon or ligament strain, horses with chronically tight or stiff tendons, and horses whose sinew health has been compromised by demanding training schedules. Available in traditional powder (500g, 900g, 1200g) and Flax Plus (30-day and 60-day supply); a six-tablespoon scoop is included with the Flax Plus format. Dosing varies by body weight and health condition; your authorizing veterinarian will provide specific guidance. Not for use in pregnant mares.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
Active ingredients: Yin Yang Huo (Epimedium brevicornu) - Epimedium; Sang Zhi (Morus alba) - Mulberry twig; Dang Gui Tou (Angelica sinensis, head) - Chinese Angelica root head; Bai Shao Yao (Paeonia lactiflora) - White Peony root; Chuan Niu Xi (Cyathula officinalis) - Cyathula root; Chuan Xiong (Ligusticum chuanxiong) - Szechuan Lovage rhizome; Gou Qi Zi (Lycium barbarum) - Lycium berries; Gui Zhi (Cinnamomum cassia) - Cinnamon twig; Shan Zhu Yu (Cornus officinalis) - Cornus fruit; Wu Jia Pi (Acanthopanax gracilistylus) - Acanthopanax root bark; Bu Gu Zhi (Psoralea corylifolia) - Psoralea fruit.
Inactive ingredients (Flax Plus only): Ground Flax Seed. Traditional Powder contains no inactive ingredients.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
Sound Tendon is an eleven-herb formula organized around three strategies: nourishing Liver Blood and Yin to restore sinew resilience, tonifying Kidney Yang and Essence to strengthen the structural foundation, and activating Blood to deliver nourishment to the tendons and ligaments:
Herbsmith Rx Sound Tendon contains Blood-moving herbs including Chuan Niu Xi and Chuan Xiong, the Kidney Yang-tonifying herbs Yin Yang Huo and Bu Gu Zhi, and the warming herb Gui Zhi, which may interact with certain medications. Horses on prescription medications should use this formula under veterinary supervision. Not for use in pregnant mares.
Medication categories warranting extra caution include anticoagulant or antiplatelet medications (Chuan Niu Xi and Chuan Xiong have Blood-moving and mild anticoagulant properties; concurrent use requires veterinary monitoring), hormonal or reproductive medications (Yin Yang Huo and Bu Gu Zhi have Kidney Yang-tonifying and mild phytoestrogenic properties; concurrent use with hormonal medications warrants veterinary oversight), NSAIDs and other medications used during tendon or ligament rehabilitation, and horses managing multiple concurrent long-term prescriptions. Your veterinarian can determine appropriateness based on your horse's condition, current medications, and laboratory results.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
In Traditional Chinese Veterinary Medicine, Sound Tendon addresses Liver Blood and Yin deficiency causing weak, brittle, or inelastic tendons and ligaments. The Liver governs the sinews; when Liver Blood or Yin is insufficient, the sinews lose their nourishment and become like a dried-out tree, lacking the flexibility needed to withstand the concussive and tensile forces of movement and training. Horses that benefit most include performance horses and sport horses with a history of tendon or ligament strain, horses with chronically tight or stiff tendons, and horses whose sinew integrity has been compromised by demanding training schedules. A TCVM-trained veterinarian can confirm that Liver Blood-Yin deficiency is the appropriate pattern before authorization.
For the traditional powder, administer two tablespoons twice daily for the first 20 days, then two tablespoons once daily. For the Flax Plus format, administer one scoop (six-tablespoon scoop included) twice daily for the first 20 days, then one scoop daily. Mix into grain for easy administration. If the horse is reluctant to eat herbs, begin with small amounts in grain and gradually increase, or choose the Flax Plus version. Confirm dosing for horses of other weights with your authorizing veterinarian. Not for use in pregnant mares.
In TCVM, the Liver and Kidney share a deep constitutional relationship: the Kidney stores Essence and governs the bones, while the Liver stores Blood and governs the sinews. Kidney Yang and Essence are the deep energetic foundation that supports Liver function; when the Kidney is strong, the Liver receives the constitutional support it needs to adequately nourish the sinews. Yin Yang Huo, Bu Gu Zhi, and Shan Zhu Yu tonify Kidney Yang and Essence to strengthen this foundation, ensuring the Liver Blood and Yin nourished by the formula has the constitutional support needed to fully restore sinew health. This dual Liver-Kidney approach is characteristic of classical TCVM sinew rehabilitation formulas.
Because Sound Tendon addresses an underlying Liver Blood and Yin deficiency, improvement in sinew resilience and flexibility typically requires consistent use over 4 to 8 weeks, with full constitutional strengthening of the tendons and ligaments potentially taking 2 to 3 months of continuous use. It can generally be used alongside conventional tendon and ligament rehabilitation protocols, including controlled exercise, controlled hand-walking, and physiotherapy, under the guidance of both a TCVM-trained veterinarian and your primary veterinarian. Your authorizing veterinarian will guide the appropriate course length, dosing schedule, and integration with any concurrent rehabilitation plan based on your horse's condition and response.
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