I heard intermittent fasting eliminates all the toxins from the body, does that eliminate dht as well?

We're self-cleaning. Humans, designed or evolved over millions of years, are self-cleaning. That means we should eat what we are designed to eat, and our bodies will clear out unneeded materials without help. No special fasting is needed (and don't believe too strongly in wild ideas about "toxins"). Proper diet, enough exercise, and a healthy mind should suffice.