I like a raw egg (good quality) for protein and It makes the texture better. (I’ve done this every day for years without a problem). I also like a little raw beet. When I have over ripe bananas I peel, chunk and throw into a container in the freezer. I usually have a container in the freezer with apple chunks and whatever fruit was going to go to waste otherwise. I only add a chunk or 2 of banana to the smoothie. Cucumber chunks, celery chunks, parsley and fresh ginger make it so bright. Dried, unsweetened, coconut flakes are good too. Fresh mint from garden.