There isnt a one-size-fits-all schedule for B12 shots
[6] Because systemic absorption of topically applied GHK-Cu seems minimal, clinically significant pharmacokinetic interactions with oral medications are unlikely
Reconstitution math: mcg to units to mL This is the calculation patients ask about most often

Semaglutide is prescribed for: Weight loss in adult patients with an initial body mass index (BMI) of 30 kg/m2 or greater (obesity) Weight loss in adult patients with an initial body mass index (BMI) of 27 kg/m2 or greater (overweight) in the presence of at least one weight-related comorbid condition (hypertension, type 2 diabetes mellitus, or dyslipidemia) Weight loss in pediatric patients aged 12 years and older with an initial BMI at the 95th percentile or greater for age and sex (obesity) Reducing the risk of major adverse cardiovascular events (non-fatal myocardial infarction, CV death, or non-fatal stroke) in adults with cardiovascular disease and either obesity or overweight Treating noncirrhotic metabolic dysfunction-associated steatohepatitis (MASH), formerly known as NASH, with moderate to advanced liver fibrosis (stages F2 to F3 fibrosis) in adults Patients taking semaglutide for any of these conditions, especially weight loss, are typically suggested to maintain a low-carb and low-fat diet

For those with a B12 deficiency and an MTHFR mutation, one major advantage of B12 injections is that they are readily absorbed in the body and do not have to be taken as often as oral tablets
2005 ran a 12-week trial on 67 women aged 50 to 59