b12 injection triggers migraine People with low are up to 5x more likely to have migraines. Vitamin B12 helps control nitric oxide, a cause of migraine." : r/migraine Migraine: Latest Disease & Treatment

A Riboflavin (Vitamin B2) deficiency typically presents with angular cheilitis , sore throat, inflammation of the tongue , and seborrheic dermatitis

Vegans and Vegetarians Because most vitamin B12 foods come from animals, people following a vegan or vegetarian diet should take a B12 supplement in order to avoid deficiency

Is it normal to feel worse after a B12 injection

Potential Side Effects Although both peptides are well-tolerated, some patients may experience: Mild water retention Joint stiffness (temporary) Insulin sensitivity changes (rare) Injection site irritation Patients should always be monitored by a physician trained in peptide therapy, and adjustments can be made to dose or frequency to mitigate any issues