is b12 injection better than oral Vitamin vs Injection​ Vitamin B12 Injections vs. Supplements:

Glutathione Injections: Glutathione is a potent antioxidant that supports detoxification and immune function

Resistance training: the non-negotiable foundation Strength training at least three times per week preserves muscle mass during caloric deficit more effectively than any supplement, peptide, or dietary strategy

B12 isn't a magic bullet

Combine Diet and Supplements for Optimal Intake Try to get your daily intake of vitamin B12 from food sources, such as liver, beef, shellfish, salmon, tuna, dairy, eggs, fortified cereals, and nutritional yeast

Important limitations on this safety profile: the longest trial was 24 weeks, the total trial population is small by modern standards, and the clinical trials used oral dosing