See full article by Dr Axe
With the rise in popularity of gluten-free baking in recent years, tapioca flour has become a staple for many people. Because cassava roots, from which tapioca is derived, are naturally very high in carbohydrates, tapioca starch is able to be extracted and made into gluten-free flour or “pearls.” These are used as a thickening agent in various kinds of foods or recipes — everything from pizza dough to pie filling.
Tapioca tastes mild and slightly sweet and is one of the purest forms of starch there is. Besides carbs/starch, it’s very low in other macronutrients or micronutrients (like protein, fats, and most vitamins and minerals). However, it’s totally gluten-free, low in calories and free from sugar — so it’s still overall useful in healthy, gluten-free cooking or baking, much like cassava flour.