Suffered with Gilberts since mid twenties, now coming up fourty, male. So briefly my Dr took some initiative and got load of different blood tests to check nothing else was going on, all came back clear. However, when getting bloods taken the nurse asked why so many bloods, so i told her my story. She has same condition, told me change to organic foods. so turns out all the antibiotics in our food, fed to animals to stop mortality rates and affect profits are what is elevating my bili numbers. So started by simply going organic milk, eggs, meat wherever possible and ive definately started to notice differences. going to get bili levels checks again in couple months time to see if numbers are down.
would recommend this as easy change
hope this helps someone else