Vitamin B12 Injections for Energy Support B12 Injections for Weight Loss Does it Even Work? Infusion For Health How Long Does It Take for B12 Injections to Work? Soza Clinic Vitamin B12 is essential for energy production, nervous system function, and red blood cell formation. However, oral B12 supplementation doesn't work well for everyoneabsorption can be limited by digestive issues, certain medications, Lipo B12 injections are given weekly and packed with substances that benefit your overall health and well being, including: Methionine, an amino acid that helps your body process fat through your liver Inositol, which