Symptoms of B12 deficiency include:FatigueHeadachesNumbness or pins and needles" in the hands and feetDifficulty walkingMemory lossDifficulty thinking normallyChanges in moodSymptoms of having too little folate are diarrhea, weight loss, and other vague symptoms that could be caused by many other conditions.it is important that women who are pregnant, thinking of becoming pregnant, or breastfeedin