If you would prefer to start out with sublingual forms and oral B12 then I recommend this supplement
[11] [4] However, long-term metformin use is associated with reduced vitamin B12 levels, listed as a 'common' side effect (affecting up to 1 in 10 patients) in the medication's Summary of Product Characteristics (SmPC)
DNA Repair: NAD+ helps repair damaged DNA and keeps your cells functioning well
[13] recently reported that GLP-1 RAs are not associated with an increased risk of intestinal obstruction in patients with inflammatory bowel disease using Danish health registries
B12 Injections can help improve memory, lack of focus, energy, emotional stability, female fertility, low testosterone for men, digestive issues, hypothyroidism, red blood cell formation, metabolism, and its also helpful for nerve and brain regeneration
Storage Sealed storage, away from moisture * In solvent : -80C, 6 months