• Free the Sinews (Yi Yi Ren Tang)

By Kan Essentials

Free the Sinews (Yi Yi Ren Tang)

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Yi Yi Ren Tang is a classical formula traditionally used to support chronic musculoskeletal stiffness and Damp obstruction affecting the joints and channels.

In veterinary practice, it is particularly useful in animals with recurrent stiffness, boggy joint swelling, fluid accumulation or musculoskeletal discomfort that worsens in cold or damp conditions.

This formula is commonly selected where chronic inflammatory obstruction and Damp accumulation coexist with underlying deficiency or impaired fluid regulation, particularly in animals prone to recurrent stiffness, swelling or incomplete recovery following exercise or strain.

Currently in Australia, KAN herbal blends are only allowed to be dispensed by a registered veterinarian.

As with all Traditional Chinese Herbal blends, KAN Herbs are best prescribed by an integrative veterinarian who can examine your animal in person. Telehealth consultations however can be used when access to an appropriate veterinarian is difficult or not possible.

If you are a registered Veterinarian, please get in touch via our contact page.

If you would like to access the KAN range of herbal blends, please book an appointment to access a telehealth (phone or video) appointment with Dr Tanya Meares BVSc.

Before the appointment, you will be asked to submit a form with background information about your animal and their health issues.

The cost of the 30 minute telehealth appointment is $80 but you will receive a discount of $40 on your first order of any product product in the shop.

These formulas require practitioner dispensing under current regulatory guidelines.

How it Works

Yi Yi Ren Tang is a classical formula traditionally used to address chronic Wind-Damp obstruction affecting the joints, muscles and channels, particularly where stiffness and fluid accumulation recur or fail to fully resolve.

In Traditional Chinese Medicine, impaired digestion and fluid regulation may contribute to the internal accumulation of Damp within the body. Over time, chronic inflammatory disease, recurrent strain, ageing, reduced movement or highly processed diets may contribute to persistent fluid stagnation within the joints and soft tissues.


Unlike strongly cooling Damp-Heat formulas used for hot, intensely inflamed conditions, Yi Yi Ren Tang is more appropriate where chronic stiffness, recurrent fluid accumulation and incomplete recovery predominate.

This formula is selected when Damp obstruction becomes chronic or recurrent — particularly where fluid accumulation, stiffness or swelling fail to fully resolve between episodes.

Clinically, these animals often show recurrent “boggy” swelling, stiffness that improves with movement or persistent joint filling that is not intensely hot or acutely inflamed.

Clinically, this formula is commonly used in:

  • recurrent joint filling or boggy swelling
  • stiffness that improves with movement
  • chronic arthritis with fluid accumulation
  • musculoskeletal discomfort worse in cold or damp weather
  • large breed dogs with recurrent orthopaedic strain
  • chronic back pain with stiffness and restricted movement
  • chronic polyarthritis where Damp predominates over strong Heat
  • horses with persistent post-exercise filling or incomplete recovery

Animals suited to this formula often show:

  • recurrent swelling that partially improves but returns
  • stiffness without marked Heat
  • damp weather sensitivity
  • fluid accumulation around joints or soft tissues
  • fluctuating restriction rather than explosive inflammation

Think: chronic Damp obstruction with recurrent stiffness, fluid accumulation and incomplete resolution.

This formula is generally less appropriate where:

  • severe acute inflammatory Heat predominates

joints are intensely hot, red or acutely painful

  • major trauma or acute injury are present
  • strong fixed Blood stasis predominates without Damp accumulation.
Ingredients

Job’s tears seed,

Cang-zhu atractylodes rhizome,

Dong quai root,

Chinese cinnamon twig,

White peony root,

Pubescent angelica root,

Chinese licorice root and rhizome.
Dosing
4kg give 0.3mls twice daily
8kg give 0.45mls twice daily
12kg give 0.60mls twice daily
23kg give 0.9mls twice daily
32kg give 1.2mls twice daily
75kg give 1.8mls twice daily
Shipping

We currently ship only to Australia. Contact us if you are in NZ and interested in getting our products.  (Not Canada or USA)

For more information, click here >

Frequently Asked Questions

How is Yi Yi Ren Tang different from formulas used for hot inflammatory joints?

Yi Yi Ren Tang is generally more appropriate for chronic, recurrent or “boggy” stiffness and swelling patterns rather than intensely hot, acutely inflamed joints.

These animals often show persistent filling, heaviness, stiffness or incomplete recovery rather than explosive Heat, redness or severe acute inflammation.

It is particularly useful where swelling and restriction repeatedly return or fail to fully resolve between episodes.
Why do some animals become stiffer in cold or damp weather?

Animals with underlying joint disease, chronic fluid accumulation or musculoskeletal restriction may become more symptomatic during cold or damp weather conditions.

In Traditional Chinese Medicine, these external environmental factors are thought to aggravate underlying Damp obstruction within the joints and soft tissues, contributing to increased stiffness, heaviness and restricted movement.
Why do some joints remain persistently “filled” even after rest?

Some animals improve temporarily with rest but continue to redevelop recurrent joint filling, boggy swelling or stiffness once activity resumes.

This may reflect ongoing Damp accumulation and impaired fluid regulation within the tissues rather than purely acute inflammation.
Can Yi Yi Ren Tang be used alongside arthritis medications or joint supplements?

Yes. In integrative veterinary practice, Yi Yi Ren Tang is commonly used alongside conventional arthritis medications, rehabilitation programs and joint supplements.

It is often particularly useful in animals with chronic recurrent stiffness, fluid accumulation or incomplete recovery despite ongoing management.
When is Yi Yi Ren Tang less appropriate?

This formula is generally less appropriate where:

  • severe acute inflammatory Heat predominates
  • joints are intensely hot, red or acutely painful
  • major trauma or acute injury are present
  • strong fixed Blood stasis predominates without Damp accumulation

In these cases, more acute anti-inflammatory or circulation-moving approaches may be more appropriate initially.