Since then, not a lot of research has come out supporting "food combining" for everyone. This may be used more on an as-needed basis for those with digestive troubles. Sometimes combining certain foods (in whole form) don't allow for proper digestion in those with inadequate enzymes or are lacking good gut bacteria. When the NutriBullet pulverizes foods, it’s reverting food to it’s pre-digested state, reducing the load on the GI system and making them more easily digestible and absorbable. By consuming fruits, veggies and boosts in this manner, many find it less taxing on their digestion as compared to ingesting food in its whole food. Check out this article for more on this topic.
Busting the myth on food combining: http://health.usnews.com/health-news/blogs/eat-run/2015/05/12/debunking-the-myth-of-food-combining
So to answer your Q...if you are not having any digestive issues, then feel free to combine healthy foods in any manner you wish.