If you fish around the internet enough, you will find some anecdotal claims of insomnia and restlessness linked to excessive B12 intake, but direct causality has yet to be analyzed by experts
However, a high degree of motivation is expected of the research team since its clinical assistance members are those involved in the enrolment process
If you are not deficient and are taking it as a supportive measure, you might not feel any dramatic change, and thats okay
Dosage and Administration (All 3 products): Give 5 - 10 mL by intramuscular injection regularly twice weekly, or as advised by a veterinary surgeon
It is not intended for human consumption, self-administration, medical or therapeutic use, dietary supplementation, athletic enhancement, or veterinary application