best gauge needle for b12 injection BD 309582 - Syringe with 3cc Luer Lock Disposable 25G x 1" Sterile, Single-Use Syringe Precision Intramuscular Injections, 100/BX, 8 BX/CS what size needle to give
Description
It is recommended to use at night.) Preservation and storage: Store in light-resistant and hermetic container

It may also enhance the activity of certain immune cells, which may ward off viruses and chronic disease such as cancer, according to a 2020 review in the medical journal, Nature (2)
The theoretical argument is simple: going sub q bypasses the gut and first-pass metabolism entirely, so in theory youd get close to 100% bioavailability versus the ~38% seen orally

If youre sensitive to shots, eat something light beforehand

API, active pharmaceutical ingredient
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