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Too Much Vitamin B12 Despite Deficiency
Make a tent out of the skin at your cat's scruff
Quest Diagnostics lists 200-1,100 pg/ml as the normal range for vitamin B12 levels
Injectable B12 may deliver better results because: Direct bloodstream access bypasses digestive absorption barriers Higher bioavailability allows for less frequent dosing Consistent therapeutic levels maintain steady benefits [6] Disclaimer: The FDA does not approve compounded medications for safety, quality, or manufacturing
Zhang H, et al
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