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The advantage of the combination product is convenience, not superior B12 delivery
A sealed pen sitting in proper refrigeration is a completely different situation from a reconstituted vial that has been punctured three times and left on a bathroom counter
Harder to assess quality when you can't see the original powder form and dissolution behavior
The exception is intensive injury recovery, where extended use until healing milestones is appropriate, followed by a proper rest period
Z zac****h December 28, 2025 Will order again Ordering process was straightforward