I am 40 years old and my urine color is deep yellow since last one year. Bilirubin is 0.96 mg/dl, sgot - 38.0/iu/lt, sgpt - 42.0 iu/lt. Uric acid 5.3, serum urea - 18 mg/dl, serum calcium 7.6 mg/dl, serum sodium - 142 meq/l, potassium - 4.1 meq/l, serum chloride - 103 meq/l, blood urea nitrogen 8.73 mg/100 ml, phosphorus 2.80 mg/dl, serum total protein - 7.1 g/dl, serum albumin - 4.0 g/dl, serum globulin - 3.1 g/dl, albumin: globulin 1.29:1, haemoglobin - 13.0 gm%, total count rbc - 5.06 million/cu. Mm, leucocyte -6,800 /cu. Mm. Serum creatinine - 0.89 mg/dl, tsh - 1.26 mu/l, albumin & creatinine ratio 15.80 mg/g, my urine culture test is normal and ultrasonography is also normal, I have only grade-i fatty liver. Mainly my urine is turn to yellow when I go to outside in first time whether hot or cold whether. After came from outside I have to take at least 2 ltrs of water to feel pressure for urine weather is cold or hot and then my urine color is turn to deep yellow. I drink 3 and 1/2 ltrs water every day. Since last two months I do not feel so much pressure as earlier to urinate. But last 2 weeks my urine is yellow all the time and I observed that my urine output is also reduced than earlier. Another symptom is itching in my foot. Is there any problem due to excess vitamin b2 (riboflavin) as I eat horlicks last two years everyday morning. But last 6 months I don't eat horlicks or other problem kindly help.