Hi Laurie. I don’t make smoothies often enough because I like to eat my greens and veggies. My kids make smoothies though. They use The Bullet. Use Amazon to find products and their description. You can even find their ratings by other consumers to help you select the best one for you.
I use my blender for mostly making my own dips like hummus or pseudo tuna salad using tofu. You can even use it in soups. Take a few cups in a blender to cream and them add it back into the soup.
In your smoothies, try using the different plant based milks for lactose intolerance like almond milk. There are so many available in the grocery store today. I would experiment to find the right taste. I found Pinterest to have many recipes. It works for me. I take a recipe to get an idea of the ingredients. I sometimes replace ingredients to my liking or do the math to scale a recipe down.
I also have cut down on my carb consumption significantly 2 years ago. It has decreased the neuropathy pain for me. What specifically do you need to stay away from in fruits and vegetables due to your digestion issues? I am not a diabetic but like to avoid carbs anyways. Are you able to exercise at all to burn carbs? It is hard for me because my mobility is limited with my health issues. I use a portable mini cycling machine and elliptical machine. Both are light weight and I am able to use on a daily basis. I have found 10 minute intervals help a great deal. My total time exercising differs day to day. It ranges between 30 minutes- 80 minutes. Exercising helps me to eliminate the bloating I felt. What a difference it has made. Hope this helps.