b12 injections for tinnitus (Ear Ringing): OTC Medications and Supplements Tinnitus Relief: What OTC Products
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Based on 75+ community reports View community protocols Frequently Asked Questions About 5-Amino-1MQ What is 5-Amino-1MQ

Storage Store at 4C in a dry, sterile, light-protected environment

Also, you can ensure the quality of the B12 itself by choosing to buy from a pharmaceutical-grade source

doi:10.1038/nchembio.1204

Based on the data available in 2015, EFSA did not identify any known health risks associated with the use of dietary supplements, so no maximum dose or maximum daily intake, also known as a tolerable upper intake, was set (EFSA, 2015)
