Robert Lustig: Visceral Fat Responds to Stress, Releasing Free Fatty Acids and Producing Ketones
Excerpt from a YouTube talk where Robert Lustig explains that visceral fat responds to adrenergic stimulation (e.g., acute stress or exercise). Norepinephrine binds beta-3 adrenergic receptors on fat cells and brown adipose tissue, activating hormone-sensitive lipase to drive lipolysis (triglycerides → free fatty acids + glycerol), sending free fatty acids to the liver where they can be converted into ketones, and increasing thermogenesis — all of which contribute to acute fat burning and weight loss.
Questions this video answers
The beta-3 (β3) adrenergic receptor.
Hormone-sensitive lipase.
Free fatty acids and glycerol.
Ketones.
Norepinephrine.
Chapters
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