HIDA scans when you have gallstones can be a problem. The HIDA scan pushes the gallbladder to its ultimate ability. It can actually precipitate an issue. Be very careful what these "functional doctors" recommend. First, be certain this is an MD from an actual American university, internship, residency and fellowship with credentials as an Internist. Second, do research on the supplements. These things are DRUGS even if they're OTC but they aren't tested or properly evaluated and some of them are potentially harmful, no matter your age.

A "spot" on your liver needs an MRI evaluation. It seems that CT scans are finding all sorts of things now with advanced technology and those "spots" can be bundles of blood vessels, totally benign and not at all uncommon. But it requires a followup independent of any research into your diet. Remember that manufacturers of supplements and other things like it make alot of money from people who are desperate to correct something and not aware of the side effects such medications can cause, worsening overall health. A "functional doctor" is not covered by insurance, also, something to consider if you are being directed toward very expensive testing. Contact a general surgeon and discuss the HIDA scan, these people see compromised gallbladders every day of the week and can better advise you. Gallstones are also common and most people never know they're there and are not bothered by them but here is NO WAY to rid oneself of them by taking any sort of supplement or "flushing" the gallbladder. You do not want to live without your gallbladder unless it is absolutely necessary. Before proceeding, talk to your primary care provider about that liver spot and get it properly evaluated.