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For naturally occurring B12 in food, the presence of gastric acid, pepsin, and intrinsic factor is essential for liberation and absorption
The logic is just as we have a thymus early in life, the thymus secretes certain things, and those things seem to accelerate robust tissue healing early in life
Potential Benefits: Fertility Preservation: Maintains intratesticular testosterone and spermatogenesis during TRT [3] [4]
Plasma concentrations following oral administration remain below 5 ng/mL, insufficient for systemic tissue effects
Intravenous shots put B12 straight into the blood
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