fb61bd32_Taking_Nutritional_Supplements__Reasons_for_Caution
[Clinical Problem] Vitamin B12 deficiency or anaemia [Potentially Harmful Nutrient] Folic acid > 1000 ug/day [Reasons for Caution] 
Folic acid supplements treat the anaemia but not the neurological effects of vitamin B12 deficiency and may thus delay the diagnosis.
Minor Contraindications to Taking Nutritional Supplements
Reasons for Caution