I can't talk for Alex, but from my experience, eating healthy foods 100% of the time is a pipe-dream. I eat pretty well generally, but I don't say no to the occasional coffee, cake, ice-cream etc. Even "healthy foods" can build up toxins in our bodies over time. Foods like bread, pasta, milk, eggs, lean red meat although healthy in terms of nutrients, still produce a toxic build up in our bodies. Even my personal trainer promotes a regular detox.
You can put the best quality, synthetic fuels and oils in your car, but it will still require servicing at regular intervals.