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Additionally, we primarily focus on the duration of GSH intake, without examining the effect of specific dosage on the prognosis of breast cancer patients undergoing chemotherapy

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doi:10.1021/bi991714t

Oral peptides are convenient but face a fundamental bioavailability problem: gut acid and peptidases destroy most peptide sequences before they reach blood

Wu X, Fan Y, Wang K, Miao Y, Chang Y, Ming J, et al