They use completely different pathways, so they dont compete with each other
TRP14 is the rate-limiting enzyme for intracellular cystine reduction and regulates proteome cysteinylation
It does, however, intend to provide a practical overview of several (patho)physiological conditions in which knowledge of this interplay is important, to understand why and how metabolism responds
[PubMed] [PMC] Duval C, Teixeira-Clerc F, Leblanc AF, Touch S, Emond C, Guerre-Millo M, Lotersztajn S, Barouki R, Aggerbeck M, Coumoul X (2017) Chronic exposure to low doses of dioxin promotes liver fibrosis development in the C57BL/6J diet-induced obesity mouse model
Compounded versions of either medication are not manufactured by these companies