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10.1039/d5sc02211h Chem

This works well when treating vitamin B12 deficiency

During the day, use it as a protective base under sunscreen or makeup

Are you ready to give your skin the nourishment it deserves

Methylmalonic acid and homocysteine levels provide accurate diagnosis when serum B12 falls between 200-400 picograms per milliliter (the gray zone where symptoms appear but standard tests show normal results)
