Your posted results are very well presented but I'd like to see more of them
Individuals over 50, you likely need supplemental B12
These can include redness or soreness at the injection site, which usually resolves within a few hours to days
[4] Pharmacokinetics and Distribution Pharmacokinetic work in mice reported systemic exposure and distribution of 5-Amino-1MQ to metabolically active tissues, including adipose, muscle, and liver, after subcutaneous compound application
Injections can cause minor effects such as irritation or itching at the injection site, and the consumer fact sheet is a good plain-language reference on what B12 does and does not do
Advances in experimental medicine and biology, 982, 359370