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1.5 g according to the UK National Health Service (NHS) and British Nutrition Foundation (BNF) Increased requirement: 5 g factors which increase an individuals B12 requirement are illness, stress, toxic stress, pregnancy and breastfeeding Dietary Supply or Supplement Requirement

The importance of vitamin B12 in adult health is huge

However, its common for blood tests to reveal inaccurate information regarding B12 levels since a high percentage is stored in the liver and not always revealed through testing

The commercial manufacturing of the vitamin is done through bacterial fermentation

Energy Production & Metabolic Function