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Hi,
I saw this article and copied a small section.
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Deficits in vitamin B12, if left untreated, can cause a number of health problems such as, loss of mental alertness, neuropathies, nausea, muscle weakness, digestive upset, depression, irritability, memory impairment, poor concentration and water retention. The normal level for vitamin B12 is 180 to 914 pg/mL; although, symptoms can start to occur if levels fall below 400 pg/mL. The physicians at Missouri Bariatric Services recommend vitamin B12 levels be greater than 400 pg/mL. Sleeve gastrectomy patients need 350 to 500 micrograms of vitamin B12 daily to prevent deficiency. Only 1% of vitamin B12 taken orally is absorbed. Vitamin B12 is best absorbed when taken sublingually (dissolved completely under the tongue) or as an injection. If taken as an injection, vitamin B12 should be given in a dose of 1,000 micrograms once a month.
It was on a University website about nutrition and weight loss surgery.
I have 1000mcg via injection every month.
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