Bugle weed has been known for its support for hyperthyroid conditions. 
 
How it Works
Bugleweed binds thyrotropin and Graves thyroid stimulating immunoglobutin (TSI) and precludes receptor activation.
 
It is mild for hyperthyroid conditions.
 
Suggested dosage for cats is 3-8 drops two times per day for mild hyperthyroid condtions.
Adverse effect may occur with overdose or sudden cessation of treatment.