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Vegans, Vegetarians, and People on Calorie-Restrictive Diets Red meat, chicken, fish, and dairy products are good sources of carnitine
Glucose-6-phosphate dehydrogenase (G6PD) deficiency: High doses of vitamin C in CB 12 injection could cause hemolysis, a condition where red blood cells are destroyed prematurely, in patients with G6PD deficiency
If you have symptoms that fit deficiency, asking your doctor about methylmalonic acid is reasonable even when the B12 looks fine
I feel so much better about myself
Significance of elevated cobalamin (vitamin B12) levels in blood
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