There are some “cleansing” products that work, but only when you have a condition they will improve in the first place.
For example, if you have poor digestion, psyllium husks, similar to psyllium seed, like Metamucil, will give the fiber and bulk to improve intestinal tone and speed up your digestion somewhat.
After the stomach uses acid to digest food, it uses bile to neutralize the acid before the somewhat digested food goes into the small intestines. The bile is then reabsorbed and reused. However, bile also tends to accumulate unwanted metals that are also recirculated. For this reason, at long intervals, it is good to consume “water soluble fiber”, because it tends to bind with bile so that it is flushed from the body, so that the liver makes fresh bile.
If you live and work in a temperate place, and don’t sweat a lot, a trip to a sauna could help you skin considerably, as sweat is one means the body uses to eliminate toxins.
There are a bunch of other cleansing techniques that work, but again, only if you need them. Most people don’t.
I live in Houston.
No trip to the sauna is necessary...