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Oral B12 supplementation generally takes longer to produce noticeable effects than intramuscular injections, with patients typically experiencing improvements within 24 weeks
Noticed improved focus and energy during workouts
B12 injections tend to be most useful for: Patients on GLP-1 medications (semaglutide, tirzepatide) who feel fatigue in early weeks Patients with low energy, brain fog, or mood symptoms Vegetarians or vegans (plant foods don't contain B12) Adults over 50 (B12 absorption drops with age) Patients who've had digestive surgeries (bariatric, gallbladder) that affect absorption They're generally safe B12 is water-soluble, so your body excretes what it doesn't use
The injections are basically pain-free apart from a stinging sensation or a little prick observed when they are administered
its an autoimmune disorder where the bodys immune system mistakenly attacks the stomach cells that produce a crucial protein called intrinsic factor
Common meds that B12 may interact with include: folic acid metformin vitamin C H2 blockers chloramphenicol proton pump inhibitors aminosalicylic acid colchicine gastric acid inhibitors Talk with your doc before adding B12 to your diet if youre currently taking any medications
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