Qingdao Sigma test results.

[Qingdao Sigma Chemicals]

Purity is good but the amount is 20% higher. It's not bad if they're all guaranteed to be 12iu but if inconsistent, your dosing can be quite off.

Last batch certificate of analysis, as you can see we try to always keep it at 4mg/vial with a 10% margin error (machines)