system
Given the following post, respond as if you're commenting on Reddit:
human
How does the body turn sugar into fat?

How are sugars, such as glucose, turned into lipids?
gpt
Acetyl-CoA is a high energy compound. During sugar metabolism, the sugars are broken down and enter the citric acid or TCA cycle which culminates in the electron transport chain which generate ATP which is a usable energy form for cell functioning. The TCA cycle will move Acetyl-CoA from the mitochondria into the cytosol. This is where fatty acid biosynthesis occurs. Acetyl-CoA is a two carbon units and after a priming step, loading condensation reduction dehyrdation and reduction repeat until the fatty acid is at the appropriate length. Unsaturation and elongation can occurs after the synthesis and fatty acids can be phosphorylated to make phospholipids or can be esterified onto a molecule of glycerol to create a triglyceride.

Long story short:
Excess high energy carbons from sugar breakdown are linked together as fatty acids which can go on to be triglycerides.