Hidden link: New study reveals how B12 and folate deficiencies may fuel chronic fatigue A March 2026 Nutrients study of 602 healthy adults found higher homocysteine levels linked to increased fatigue and lower motivation High homocysteine levels consistently correlated with lower vitamin B12 and folate status in both sexes Men with highest homocysteine levels reported significantly more physical fatigue; women reported lower motivation scores Researchers caution the findings are hypothesis-generating, not proof that deficiencies directly cause fatigue Clinicians recommend testing B12, folate, homocysteine, iron, and thyroid markers before self-supplementing The discovery that changes how we understand exhaustion A new study…

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