You know what it means.
by Tdog0304 March 9, 2023
Get the Leaning tower of Pisa and Luxor in vegas mug.The term "lean mass hyper-responder" was coined by software engineer David Feldman on July 3, 2017 while posting in his low-carb diet blog: "Cholesterol Code." The blog post called "Are you a Lean Mass Hyper-responder?" quickly circulated through the low-carb community.
As background, the original term "hyper-responder" was already used by dietary professionals for years prior to Feldman's blog post. And in dietary literature, a "hyper-responder" is someone who adopts a low-carb diet, then experiences dramatic cholesterol elevation. So when Feldman wrote his 2017 blog article, he co-opted "hyper-responder," and crafted his new term "lean mass hyper-responder" to describe what he believes is a metabolically unique sub-set of all hyper-responders. Specifically, some hyper-responders begin a low-carb diet while already in possession of a very lean body mass. And yet in spite of this, they still --quite counter-intuitively-- respond with extreme cholesterol elevation. Additionally, these subjects experience a marked decrease in triglycerides, while exhibiting excellent metabolic health. The entire phenomenon defied a long-standing metabolic theory called "The Lipid Energy Model," presenting a scientific conundrum for Feldman.
Feldman believed that all this was a significant observation worth exploring. And his efforts eventually led to a 2023 research project called "The Lean Mass Hyper-Responder Study" led by Dr. Matthew Budoff and Dr. Nicholas Norwitz at Lundquist, UCLA.
As background, the original term "hyper-responder" was already used by dietary professionals for years prior to Feldman's blog post. And in dietary literature, a "hyper-responder" is someone who adopts a low-carb diet, then experiences dramatic cholesterol elevation. So when Feldman wrote his 2017 blog article, he co-opted "hyper-responder," and crafted his new term "lean mass hyper-responder" to describe what he believes is a metabolically unique sub-set of all hyper-responders. Specifically, some hyper-responders begin a low-carb diet while already in possession of a very lean body mass. And yet in spite of this, they still --quite counter-intuitively-- respond with extreme cholesterol elevation. Additionally, these subjects experience a marked decrease in triglycerides, while exhibiting excellent metabolic health. The entire phenomenon defied a long-standing metabolic theory called "The Lipid Energy Model," presenting a scientific conundrum for Feldman.
Feldman believed that all this was a significant observation worth exploring. And his efforts eventually led to a 2023 research project called "The Lean Mass Hyper-Responder Study" led by Dr. Matthew Budoff and Dr. Nicholas Norwitz at Lundquist, UCLA.
IN A SENTENCE: "Steve has always been a tall, skinny, beanpole of a guy. And then when he went on the carnivore diet, he was still skinny, but his cholesterol went through the roof. His doc said that overall he's pretty healthy, so he might just be a lean mass hyper-responder."
by Innocent Byproduct December 13, 2023
Get the Lean Mass Hyper-Responder mug.When someone drinks too much lean (a mix of codeine cough syrup and promethazine), causing their body to slow down dangerously — leading to nausea, confusion, slow breathing, or even coma and death. It’s not just “feeling sick,” it’s a medical emergency.
“Bro tried to flex with a double cup and ended up in the ER with a lean overdose — that stuff ain’t no joke.”
by rio8k October 23, 2025
Get the lean Overdose mug.Accepting the fact that being lean (<=15% body fat) is optimal for male health and attractiveness. A person who believes this is said to be lean pilled.
This belief exists to counter the narrative pushed by powerlifters and perma bulkers, which states that one should just get as big as possible and prioritize lifting numbers above everything else.
This belief exists to counter the narrative pushed by powerlifters and perma bulkers, which states that one should just get as big as possible and prioritize lifting numbers above everything else.
Friend: What happened to you? You used to be so strong and swole!
Me: I decided that feeling and looking my best is better than being able to bench 4 plates. I took the lean pill.
Me: I decided that feeling and looking my best is better than being able to bench 4 plates. I took the lean pill.
by OW_player June 12, 2024
Get the Lean pill mug.by mr twittie twister and his sis February 10, 2021
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A slang term for Thailand’s street version of “lean.” Unlike the American version that mixes codeine cough syrup with soda and candy, Thai Lean is almost always just kratom tea (namtom) combined with diphenhydramine (Benadryl) syrup or crushed tablets, sometimes with tramadol or other cheap medicines. While soda might be added occasionally to mask the bitterness The effect is a heavy, sedating high layered over kratom’s stimulant base, but it’s unpredictable and carries significant health risks.
by RealCulture August 25, 2025
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