Now, the question is, what makes triglycerides so special? Why is it that our cells actually choose to store the predominant amount of energy within our fat molecules, the triglycerides, and not within, for instance, the glycogen? Well, these two properties make glyceroaldehyde such a highly concentrated storage of energy. So number one is their highly reduced molecules and number two is their anhydrous. Now, what do we mean by highly reduced? Well, essentially, we have removed lots of electrons from the triglycerides.