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128 Adipocytes and other cells can secrete eNAMPT, and plasma levels of eNAMPT are usually increased in obesity
Another study found that vitamin supplementation may help prevent DNA damage by aiding DNA replication and transcription

The intracellular storage of cystine in fibroblasts was demonstrated by Schneider et al

As such, there would seem to be no harm in supplementing a diet with reducing equivalents