The main selling point of the nutribullet is that everything is blended and ground so well that you have a cup of fluid and not of cup of chewy lumps that didn't get pulverised.
This makes no difference to your stomach whatsoever. Chewy lumps or fluid,it all gets renndered down to liquid form because the only way nutrients can be absorbed is at a molecular level. The digestive system has had many millions of years to perfect getting the last trace of usable nourishment from anything that is presented to it, and it is quite capable of dealing with food in its natural state, bitten and chewed.
In fact, chewing the food actually improves its digestibility, as enzymes in saliva start to act on the food inside your mouth, something that cannot happen if it is drunk or swallowed without chewing. Spit on some powdered starch,for example and almost immediately it will test positive for sugar as the enzymes get to work.
The Nutribullet is snake oil salesmanship pure and simple,taking advantage of people with little knowledge of human anatomy and the digestive system with some very dubious claims.
The best you can say is that it does not do any actual harm. Not something that really seem paying a premium price for.
Still, as they say, no one ever went broke underestimating the intelligence of the public.
