side effect of b12 injection Shots Effects And How To Treat Them Vitamin B12 shots: Uses, benefits,

Durability Efficacy against symptomatic infection also waned over time for all vaccines (average decrease of 13.6% per month, 95% CI 5.522.3 [5]

However, there are easy OTC treatments to address allergic reactions using prophylactic (~4 hrs prior) anti-histaminics, Allegra, Benadryl, etc

In one mouse study, researchers found that the peptide reduced the pain felt by the animals in their paws when placed on a mildly hot plate. The authors explained that this could be because GHK is similar in structure to cimetidine, a histamine H2 receptor antagonist sometimes given to reduce pain in certain digestive conditions.3 10 In rodents, doses as low as 0.5mg/kg were found to be effective in delivering these anti-pain effects.25 In a 70kg human, an equivalent dose would be around 5.6mg, though thats likely higher than necessary: pharmaceutical-grade GHK-Cu normally ranges from 0.5 mg to 2.5mg per injection

They send all supplies with it, and it is in a beautiful package as well