Hey ,
It's unfortunate that many fruits and vegetables give most individuals with IBS-D digestive complications. The problem with many fruits and vegetables for people with IBS-D is the higher concentration of fiber and sugar, both of which can cause potential issues for IBS sufferers. I experience the same issue with many fruits where the skin is meant to be eaten (apples, pears, nectarines, etc.) as well as fruits with higher concentrations of sugar like strawberries and blueberries which usually give me uncontrollable diarrhea if eaten in larger quantities. Vegetables with high fiber especially those in the cruciferous family (broccoli, cauliflower, brussels sprouts, cabbage, etc.) usually cause problems for me as well, including extreme gas and bloating.
The best advice I have when trying to add these nutritious foods to your diet with minimal complications is to eat them in smaller quantities at one time, as well as mixing them with other substances you generally have no issues with. For instance, if I am going to eat broccoli, first I will steam it. Yes, this will lower the nutrient content compared to eating it raw, but since it is already in a more broken down state after steaming, it will be easier for your body to digest and break down even further. I would usually only have two or three small pieces, not an entire head of broccoli. Also, I would mix it with something like plain white rice, that way it has something to bind to in the digestive tract, instead of shooting through me like a bullet train. When you are trying to get in your fruits, if you plan to continue to make smoothies (which I personally love!) add in some other ingredients that will also slow down your digestion. I love peanut butter and banana smoothies, or mixed berry and vanilla protein powder and chia seed smoothies. Adding in other substances such as the peanut butter or protein powder will slow the rate of absorption, including the uptake of sugar in your body and blood stream. Instead of getting that usual initial sugar spike right after consuming a sugar filled drink, your body will be able to utilize the energy from the sugar over a longer period of time, and allow your body time to digest the fruit a little easier, minimizing your complications.
It can sometimes be very difficult to eat healthy when some of the healthiest foods in the world make you writhe in pain. Hopefully the smoothie recipe list Chris posted will give you a great head start on your smoothie adventures. Enjoy!