>Aren't glycerides from sugars?

Triglycerides are fats derived from food that circulate in the blood. The majority of the fat we consume is in the form of triglycerides. Extra calories, alcohol, and sugar in the body are converted into triglycerides, which are then stored in fat cells all over the body. As a result, when you consume a high-sugar diet, your liver produces more bad cholesterol, known as LDL, while decreasing your good cholesterol, HDL. Because there is excess energy in the form of sugar, the liver is forced to convert that sugar into fat, which it does by producing more triglycerides.

Triglycerides consist of a small glycerol backbone with three fatty acids attached. The glycerol can be quite directly derived from sugars, but the fatty acids would require more complicated de novo lipogenesis. Simpler for the adipocytes just to use fatty acids from fat, but it's certainly possible to make fat from sugars.