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After the second shot, those numbers rose to 90 percent of the younger age group and 83 percent of older people
7 NCBI BookshelfBest practices for subcutaneous injection: aseptic technique, site rotation and administration
Some people use it experimentally for circadian rhythm support or anti-aging purposes, though these applications remain investigational
For those who fall outside these categories and have normal serum B12 levels, an injection is a discretionary wellness choice not a medical treatment
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