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Tian, C
Not reliably
It works best when combined with proper nutrition and exercise
Endocrinology Reviews, 39(2), 333350
Excellent sources include: Meat, particularly liver and kidney (organ meats contain the highest concentrations) Fish, especially salmon, trout, tuna, and sardines Shellfish, particularly clams and mussels Eggs, with B12 concentrated in the yolk Dairy products including milk, cheese, and yoghurt Fortified foods such as certain breakfast cereals, plant-based milk alternatives, and nutritional yeast The NHS recommends that adults need approximately 1.5 micrograms of vitamin B12 daily
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