openLifetime | Health Archive

A free evidence index covering supplements, food safety, and trending health topics. Just data, not advice.

Quick-reference evidence cards

Supplement, food-safety, and home-device entries summarize the available research and cite our sources — algorithmically screened peer-reviewed studies. Entries reference generic product types rather than brands.

Browse Supplements → Food Safety & Awareness → Home Devices →

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Every entry cites peer-reviewed studies and is screened for methodological rigor before inclusion. No sponsor or affiliate links.

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Vitamin B12 the topic

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Overview what it is

Essential water-soluble vitamin for red blood cells, neurological function, and DNA synthesis.

Benefits & Mechanisms why it matters

  • Essential for myelin synthesis; deficiency causes neuropathy.
  • Required for RBC formation; deficiency → megaloblastic anemia.

Caution where the data is weak or risks exist

  • High-dose ("megadose") B12 has been reported to trigger an acneiform / rosacea-like skin eruption that resolves on discontinuation.

Study Dosages dosage range from studies

2.4–500 mcg/day[1][2]

Supporting Research the sources we cite