Why Do I Feel Worse After My B12 Injection
Then, pull back the plunger
James specializes in helping patients improve their overall well-being, including their cardiovascular health and conditions like diabetes, high blood pressure, and sleep apnea.
Unfortunately, your body cant produce its own B12 to take advantage of all these benefits, so you have to consume it through food or supplements

Food & Drug Administration (2025) Ozempic, DailyMed (2025) Wegovy, DailyMed (2024) Once-weekly semaglutide in adults with overweight or obesity, New England Journal of Medicine (2021) Vitamin B12, National Institutes of Health Office of Dietary Supplements (2024) Vitamin B12 injections: What they can and cant do, Cleveland Clinic (2024) Once-weekly semaglutide administered after laparoscopic sleeve gastrectomy: Effects on body weight, glycemic control, and measured nutritional metrics in Japanese patients having both obesity and type 2 diabetes, Obesity Pillars (2024) Inverse association between serum vitamin B12 concentration and obesity among adults in the United States, Frontiers in Endocrinology (Lausanne) (2019) Medically accurate: SingleCares Medical Review Board analyzes all of our content to confirm its in line with current medical advice