how many glutathione injections for skin whitening Injection Benefits Examining Glutathione Injection Skin Whitening:
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Assuming you followed the above advice and used an appropriate binding buffer and your protein isnt huge, then a likely reason for this is that the expression yield is much lower than you expected

It affects purity, dosing confidence, expected side effects, and the ability of a physician to monitor outcomes responsibly

Affects the nerve roots that supply the legs, so symptoms usually involve back pain, buttock pain, and leg pain or weakness with walking and standing

Every batch is third-party tested by HPLC to 99% purity, with a certificate of analysis (COA) available on request