Several weeks others experience more gradual changes as red blood cell levels normalise
B12 plays a role in how your body processes fats and proteins, so a deficiency can leave you feeling sluggish
The combination is most useful for patients with one or more of the following: BMI of 30 or higher , or BMI 27 with at least one weight-related condition such as type 2 diabetes, hypertension, or sleep apnea History of fatigue, low mood, or brain fog on previous diets or weight loss attempts Metformin use for type 2 diabetes or pre-diabetes (chronic metformin reduces B12) Long-term proton pump inhibitor use such as omeprazole, pantoprazole, or lansoprazole Vegetarian or vegan diet with limited animal protein intake Adults over 50 , where B12 absorption naturally declines Active strength training or higher physical demands while on a calorie deficit Patients who dont fit any of these profiles can still take semaglutide alone, then add B12 if symptoms suggest it

Macrocytic anemia occurs when your body doesnt have enough normal red blood cells, and can cause symptoms including muscle weakness and paresthesias (paresthesias is the technical term for the pins and needles feeling on your skin)
A healthy gut will break down a capsule during its journey through stomach acid reducing the level of nutrients that are released into the bloodstream
Interestingly, most people are deficient in vitamin B12, especially vegetarians or vegans, and persons with specific diseases