Had blood tests for anti-coagulation (daily nose bleeds) which came back clear, but the 'serum creatinine' levels came back as borderline so have to have another blood test next Monday. The doctor said I should stop taking creatine (5g per day) and protein supplements just to make sure that it is not those that have my levels up high and hopefully levels have reduced otherwise it could be 'bad' news for my kidneys. I have read that high protein diets can also elevate levels but not sure if 1.75 to 2g per lb of body weight is considered 'high'