Another advantage is reduced contamination risk
The duration that a B12 injection remains effective in your body depends primarily on which formulation you receive
Pull 1 milliliter (or cubic centimeters abbreviated cc on a syringe) of water from the vial into a syringe and then squirt it into the vial containing the powder

Energy+ Boosts Energy Levels Improves Hydration Fights Fatigue & Brain Fog Great for Active Lifestyles Key Ingredients: Vitamin B12, Amino Acids Immunity Strengthens Immune System Boosts Vitamin Levels Great for Traveling Cold & Flu Season Defense Key Ingredients: Vitamin C, Vitamin B12, Magnesium Brain Improves Brain Health Boosts Vitamin Levels Sharpens Mental Performance Great for Memory Care Key Ingredients: Phosphatidyl Choline Glow Up Boosts Collagen Production Revitalizes & Rejuvenates Skin Improves Deep Hydration Supports Hair, Skin & Nails Key Ingredients: Vitamin C, Vitamin B, Amino Acids, Magnesium Weight Loss Helps Burn Fat Boosts Energy Levels Supports Metabolic Function Improves Hydration Key Ingredients: Vitamin B12, L-Carnitine, Vitamin B Detox Helps Cleanse Your Organs Detoxifies the Liver & Kidneys Hydrates & Revitalizes Pairs Well with Glutathione Key Ingredients: EDTAs, Glutathione (add-on) Relive Health Brentwood also offers IV vitamin therapy that includes NAD+ and Methylene Blue

Milk: 1 cup (250 ml) provides 20% of the RDI
Vitamin C: Supports immune function, skin health, and antioxidant protection