can injectable b12 be taken orally Vitamin Oral vs Injection​ B12 Injections vs Oral Supplements:

Injectable B12 Safety Concerns Injectable vitamin B12 is known for its effectiveness

5-Amino-1MQ operates through an entirely different mechanism: it functions as a competitive inhibitor of nicotinamide N-methyltransferase (NNMT), the enzyme that converts nicotinamide (vitamin B3) into N-methylnicotinamide

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That is the proposed reason it does not raise IGF-1 levels or impair insulin sensitivity in animal work, in contrast to full-length growth hormone

This underscores why unexplained elevations, particularly above 1,000 pg/mL, should be taken seriously and investigated