Because this is a powerful compound that influences core metabolic pathways, its use requires a thoughtful approach
Another subtle mistake is relaxing the muscle incorrectly: for an intramuscular injection, you want the target muscle loose, not flexed, because a tense muscle resists the needle and amplifies pain
Reconstitute the 5 mg vial with 2 mL of bacteriostatic water, swirl gently, and store at 28C, using within 4 weeks
Some groups are more likely to come up short, including older adults, people who eat little or no animal food, and those with digestive conditions that make absorption harder
A large 2026 study found that colon cancer patients with very high B12 levels survived a median of around five years, compared with nearly eleven years for those with normal levels
References Rodgers RJ et al