Neuropathy, tingling, burning and numbness in the feet or hands Cramping or pain in your legs, buttocks or feet Tired, aching feet, or swelling of the feet and legs Frequent unexplained headaches and sudden attacks of dizziness or mild disorientation Low energy Dizziness when standing quickly Irregular heart beats Sluggish memory Lack of stamina Lower back pain Shortness of breath Cold Hands/Feet Mental confusion Poor vision Less frequent urination Impotence Etc.