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[1] Don't purchase over-the-counter B12 supplements without medical guidance, as this can interfere with accurate assessment and may mask underlying conditions

Individuals Taking Certain Medications Some drugs, like metformin or proton pump inhibitors, can interfere with B12 absorption

This is ideally good for individuals with dry or sensitive skin who struggle to retain moisture

Sublingual Tablets or Drops: You place these under your tongue, allowing the B12 to be absorbed directly into the rich network of blood vessels there, completely bypassing the digestive system

This means B12 deficiency is real and underdiagnosed, but it is not universal and not everyone experiencing fatigue has a B12 problem