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In this case you may experience symptoms including: Weakness, tiredness, or lightheadedness Heart palpitations and shortness of breath Pale skin A smooth tongue Constipation, diarrhea, loss of appetite, gas Numbness or tingling, problems walking Vision loss Experiencing depression, memory loss, or behavioral changes Those who are deficient but not anemic may also experience symptoms, such as: Fatigue & weakness Low moods Decreased concentration level Loss of appetite Constipation Poor memory How to Increase your B-12 Thankfully, there are a few ways you can get the essential vitamin into your body to help improve your overall body function

L.O'RourkeK.AndersonK.WarmingS.et al

Journal of Physiology, Paris , 87 (5), 313327

Visible changes in pigmentation and skin tone typically require 8 to 12 weeks of consistent daily supplementation

doi: 10.1016/j.biopha.2017.10.001 28