Alternative survival pathways are commonly seen to be upregulated upon inhibition of receptor tyrosine kinases (RTK). including Her-2. It is established that treatment with Herceptin leads to selective overexpression and activation of epidermal growth factor receptor (EGFR) and Src which further contributes to oncogenesis in Herceptin resistant and triple negative breast cancer (TNBC)... https://parisnaturalfoodes.shop/product-category/branched-chain-amino-acids/