If you followed Dr(not really) Charlie, he didn't even know what candida is and when it was explained to him, he said that a person needs to clean and strengthen organs AND address candida overgrowth. I think he knows a thing or two about liver, but not much beyond that. He didn't know (or believe that it exists) what leaky gut is.
His "tonic" isn't magic, there are many liver tonics to be had.
I agree that candida is a symptom that things are out of balance, but once present, releases hundreds of toxins that cause havoc, ignoring it is present isn't going to resolve health issues. All things need to be addressed.