In vegans, a deficiency of vitamin B₁₂ may be masked by a high intake of folate.

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A deficiency of vitamin B12 may go undetected in vegans who consume a high amount of folate because folate can improve the health markers typically used to diagnose a vitamin B12 deficiency. However, B12 deficiency should not be ignored, as it can cause serious health problems over time. Vegans are recommended to take a B12 supplement or consume foods fortified with B12 to ensure adequate intake.

In Vegans, a Deficiency of Vitamin B12 May Be Masked

In Vegans, a Deficiency of Vitamin B₁₂ May Be Masked