is sublingual b12 as effective as injections Vitamin vs. Oral Supplements: Which Better? B12 Under the Tongue: Uses,

Dipeptidyl peptidase-4 inhibitors and gallbladder or biliary disease in type 2 diabetes: systematic review and meta-analysis (BMJ)

Week by week expectations Understanding typical progression helps set realistic expectations and identify whether your protocol needs adjustment

The combined effect is faster, better-supplied tissue repair across muscle, tendon, and other soft tissue

Studies (5) do show that sublingual B12 supplements do raise serum B12 levels but my personal experience suggests that sublingual supplements are probably not absorbed very well under the tongue

The MHRA advises periodic monitoring of B12 levels in at-risk or symptomatic patients taking metformin