@zaaku on the old forum @haidut had a thread where he mentioned using caffeine to clean out the liver. I myself used this method using 1200mg/day split into three doses of 400mg at breakfast, lunch, and dinner. The effect on glycogen storage is unmistakable in my opinion. After two weeks at this level I’m able to tolerate black coffee on an empty stomach, (a test for glycogen storage) and I can go longer between meals without blood sugar issues.
When I feel my liver function needs a leg up, I do this again. I’ve done it twice, (once a year for the past two years).