If you are going to follow the suggestions for colon cleanse, then afterwards an organic coffee + distilled water enema can help the liver unload toxins via the gallbladder. I have used 1/day for nearly 15 years, with no obvious ill effects, and a lot of benefits. But they need to be done correctly, or will damage.
I would check if your ph balance is skewed - relatively easy to do with litmus strips.A Heavy metal toxicity test/mineral deficiency test if you think that is a possibility.
Deoxygenation could exacerbate the existing problems - 35% FOOD_GRADE Hydrogen Peroxide can deal with that. There are protocols for taking internally (build to max 25 drops 35% FGHP in 1/4 liter distilled water-> under ½%). It is very cheap, and can also be used at 3% as a body spray. It literally oxides the **** out of body odor. It can be used as mouthwash (<3%), small amount in enemas, as toothpaste (with organic sodium bicarbonate), in baths etc. It is a subject that should be researched thoroughly; it solved the relatively slight odor problems - I had.
Most important is to try to eat/drink only organic produce - juices are a great help when made with fresh organic fruit/veg. Unless you're very acidic (and maybe even in that case), distilled water only for drinking could be beneficial. Keep away from as many chemicals as possible - household cleaners can be very toxic, amongst unfortunately many other sources.
Hope you manage to solve the problem - but don't stop playing the games (not until you've played DeadSpace3 anyway:-)).