I have been having dark almost black if not black colored stool. i am worried because my lower stomach and legs should i be concerned?

Need to evaluate: From what you described, you may be having bleeding in your stomach or intestine. It would be prudent to see a doctor. At a minimum you need to have your stool examined for occult blood. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. Get HPV vaccine.