pins and needles after b12 injection Tingling, numbness, or a “pins needles” sensation in your hands or feet—especially if persistent—could be a sign of Vitamin deficiency. This vitamin is vital for healthy nerve function, and when Vitamin B12 Can lead to

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This is usually an indication that you have a methylation defect and need to slow down on the amount of B12 you are taking

[PubMed: 6075449] 10

Biochemical Pharmacology (2019) 6

Description 5-Amino-1MQ 50mg Chemical Makeup Chemical Name: 5-Amino-1-methylquinolinium Molecular Formula: C10H11N3 Molecular Weight: 173.22 g/mol Form: Lyophilized powder Solubility: DMSO, ethanol, water (limited) Research Use Only This compound is provided strictly for in vitro and in vivo laboratory research purposes only

However, these safety data come from systemic administration studies