We recommend not blending for more than 60 seconds at a time. If you blend for too long it may heat up the Blast. If you stick to the 60 seconds or less then you most likely won't over-blend. As far as texture, I don't believe it's bad to keep blending into smaller and smaller particles...makes for a very smooth texture.
Thank you. Does over-blending affect,break down nutritional components at all?