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Look for HPLC-MS verification showing greater than 98% purity (preferably 99%+) and endotoxin testing confirming bacterial contamination levels below safe thresholds

Ethics statement The animal study was approved by the Ethics Committee of Shanghai General Hospital Affiliated with Shanghai Jiaotong University School of Medicine (IACUC No

Category 3: Substances that remain in a state of limbo due to insufficient data

Butyrate is essential to maintain the mucosal barrier and immunomodulation (195), whilst having anti-inflammatory effects through downregulating pro-inflammatory cytokines (196)

As cysteine is relatively rare in foodstuffs, it is this amino acid that is the rate-limiting factor in glutathione synthesis by the body