Hi dear , The dark coloration of lip and skin is probable due to sun exposure and lack of good diet . Sometimes UV radiations of the sun trigger the melanin producing cells called melanocytes to produce excess melanin , ehich is responsible for dark coloration of skin and lip .I would suggest you to wask your skin twice a days with mild soap and cold water and apply kojic acid containing cream which is very effective , Exfoliate your skin twice a week to remove dead skin and dirt and apply broad spectrum sunscreen while under exposure of sun. Also apply lipbalm containing SPF 15 . For weight you should consult dietitian for proper diet chart and also to find out the exact cause of your less weight . As far as songobion capsule are concern , you should take then only on the advice of doctor because they are meant for anemic persons . Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari