tfcc tear and using bpc 157 Tears Treatment Triangular Fibrocartilage Complex Injury​ (TFCC)

[7] (This interaction is not significant when levodopa is combined with carbidopa, as in standard carbidopa/levodopa therapy, because carbidopa prevents peripheral levodopa breakdown.) Another notable interaction involves the chemotherapeutic agent altretamine: coadministration of pyridoxine can decrease altretamines effectiveness and is generally advised against unless specifically directed

And the rat data here is extensive

10 Exclusively breastfed children of mothers with vitamin B 12 deficiency are at increased risk of failure to thrive, hypotonia, ataxia, developmental delays, anemia, and general weakness

International Journal of Trichology , 9(3), 129134