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Thats because the copper component can directly trigger mast cell activation

In modern peptide research, BAC water is preferred over plain sterile water because of two practical realities: lyophilised peptide vials are typically over-filled (giving 3060 days of working stock), and laboratories need a diluent that tolerates repeated stopper puncture without microbial bloom

The addition of reduced glutathione causes turbidity that disappears after the addition of sodium hydroxide, yielding a clear solution

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