A Common Nutrient Deficiency That Will Cause Strokes,  Alzheimer’s, Heart Attacks, And Depression. About one in 7 people have a genetic deficiency that keeps them from converting folic acid to its final usable form. The genetic defect is in the 5,10-methylenetetrahydrofolate reductase (MTHFR) gene, causing a folate deficiency even though they have plenty in their diet … Continue reading 5-MTHF: A Common Nutrient Deficiency