Supplement

I don't think there is one :(.

General wellness and patient rehabilitation is the only avenue.

As with any rehabilitation, correct diet will underpin your success.
 
Forage Plus do a supplement called Jiaogulan which might work. It is a Chinese herb used in the treatment of laminitis to help improve blood flow which is also beneficial for damaged ligaments and tendons that often don’t receive a good supply. It has to be fed with another supplement but if you have a look at the website it explains it far better than I can.
 
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