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In particular, A 4-x species have been suggested to be primary copper binding agents in the brains extracellular spaces that form highly redox stable complexes with copper which can sequester copper from A 1-x peptides (Stefaniak and Bal, 2019

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On the other hand, a more recent study from 2015 found that beta-arbutin is more effective both on mouse melanoma cells and on human melanoma cells (btw, kojic acid was the most effective on human melanoma cells)

Antidepressant transfer into amniotic fluid, umbilical cord blood and breast milk: a systematic review and combined analysis