"Toxicity" of chemicals, is a thing, "Toxins" as an umbrella term, are not.
Fasting periods do increase the number of immune cells in the blood, but again, the number of claims about it outweight the number of evidence to support it.
I would say, maybe it would be beneficial to fast for one or two days every other week.
But to think that fasting every day is good is just too much.
Unless you eliminate nearly all carbs from your diet,
one large meal a day will give you a spike in weight gain and possibly diabetes over time.