For the h2o2, they are referring to enemas…which I personally don’t recommend or think is a way to cure the body/infestation.
The other thing you are mentioning sounds like you are interested in alkalizing the body via lemon. Well, you aren’t even sure if its too acidic or not, are you? The only way to know for certain is to take a pH test, and have the results analyzed by a naturopathic doctor (or yourself if you want).
The body will alkalize/acidify itself to the correct acidity as you do the diet. Additionally, if you are looking at removing heavy metals and parasites from the body; the probiotic does a great job of doing that as well.
Even though you are looking at these alternative ideas, there are other/different ways to treat those issues one at a time.