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The benzyl alcohol preservative doesnt indefinitely extend the peptides stability, but it does protect the solution from bacterial contamination during that window
This matters for those planning families or concerned about hormonal effects over time
B12 Injections For Chronic Diseases People with certain long term disease like muscular degeneration, diabetes, Lou Gehrigs disease, and osteoporosis tend to do better with a healthy level of B12 in their diet, or including injections to help keep these levels where they should be
Why It's Designed for Single Use Only The absence of benzyl alcohol is the main reason for its design
USP Convention, 2023
That's biology
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