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Adipose tissue retains an epigenetic memory of obesity after weight loss

nature.com

211–220 of 343 posts

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#211

Earlier quoted context omitted.

I kinda went down a rabbit hole a while back with certain treatments that can kill adipocytes, as there's actually some significant research backing both heat-generating and cold-generating treatments. They do kill fat cells, and they are flushed out of the body. But people who undergo such treatments do not lose fat. At best, these devices can reshape your fat, pulling it out of one area and distributing it more eve…

Interesting! Why can't we just remove the triglycerids from the blood before they trigger adipogenesis? Basically we need a form of dialysis.

I have no real or deep knowledge, just some casual pop news reading.

Isn't ketosis the state, in which the body switches to fat as the primary fuel?

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#212
post #192
post #116

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For me, sugar was the reason I couldn't lose weight. I got a CGM (continuous glucose monitor) and got my blood sugar under control, and with very little effort I lost a lot of weight. I use 90% cacao Lindt to control my sweet tooth. 1/2 the bar has 4g of sugar, and I consume it over hours. It also has the side effect of reducing my hunger. If you eat much of 90% chocolate, it makes you feel nausea. The trick is to pu…

I’d be interested to hear more here - what CGM did you buy? What was your process for monitoring?

I just completed two weeks with Lingo by Abbott. It was decent. I wish it had better integration of the data with Apple Health, but I liked the Lingo score as a way of "gamifying" it and the UX overall was decently done.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#213

Earlier quoted context omitted.

I can't remember exactly what I was listening to, maybe some kind of NPR podcast. But the doctor was mentioning that none of the influencers influencing young people to try T and Steroids (which is rampant right now) are ever mentioning that you are on a ticking clock to infertility as soon as you start this stuff. Some people can regain their fertility but it might take years, and some people are going to be permane…

Testicular atrophy and HPT axis suppression is a thoroughly documented side effect of TRT and steroids. Even beginner bodybuilders know that taking steroids will crush their natural testosterone production. They can kind of bring it back by taking short courses and using certain medications after the cycle, but most discover that some permanent damage is being done with each cycle. There are two problems with framing…

I am a data point of resuscitation of fertility. Confirmed to be shooting blanks after years of juice, and decided to see if I could reactivate by following the broscience (and all the pubmed papers) on the topic.

An aggressive protocol of HCG and HMG (analogues for FSH and LH in the pituitary) reactivated the testes to get back to spermatogenesis and T production after about 5 years of complete dormancy. It took about 4 months of daily needles and well-timed marital conception-attempts. The son I fathered as a result is anecdotally very strong and a voracious eater. My urologist said it sounded like I knew everything I needed to do and was satisfied to let me self-treat.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#214
post #114

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This is self-defeating and untrue. Many people, myself included, have kept weight off for decades. But you don’t get there by thinking of your new lifestyle as “dieting”. You need to learn to love eating healthy foods in a healthy amount, and getting exercise. Eventually you can get to a place where the old foods and habits are simply unappealing.

This is not untrue. Look at the long term numbers for successfully keeping weight off, 5, 10 years out. They’re abysmal.

I wonder how much of that is due to a sedentary lifestyle? If you're running and biking and strength training it makes a big difference vs trying to maintain a healthy weight with a low TDEE.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#215
post #29

The more you research/learn about obesity, the worse it is, much like smoking. One of the most depressing stats is that dieting does not get easier with time. The probability of eventually regaining all the weight eventually converges to 100%. Even if you're successful for 2 years, people still regain by year 4, 5, etc. The body never resists trying to regain the weight. GLP-1 drugs are the best hope yet.

> One of the most depressing stats is that dieting does not get easier with time. Yeah, I've tried several times under medical control. I kept asking my supervising doctor: "When is the constant hunger going to get better?" And the answer was always in the range of a few weeks to several months. But that moment never came... never! And, in the end, all the kilograms I had lost along the route always found their way b…

Embrace the suck.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#216
post #169

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It happens because we act like calories are calories when it's clearly not true. Calorie counts in nutrition data are generated by something like burning the food in a bomb calorimeter. Which is most definitely not what our bodies do. We have all kinds of different biochemical ways of metabolizing different types of foods. So someone eating 1000 calories of day could be eating very healthy or they could be ingesting…

Why is it that people claim the laws of thermodynamics do not apply to humans?

Because our metabolisation mechanisms are extremely complex and many things, like genetics, decide how we metabolise food; we are not petrol engines.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#217
post #209

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Though that also comes with male-pattern skeletal growth. So unless your body still has elevated/male-level T levels, you're carrying around a disproportionately heavy skeleton which negates the advantage. If the net effect were actually an advantage, you'd expect the womens' sports which are allowing trans women to be dominated by them, but they really just aren't. Additionally, trans women on HRT typically have the…

> Though that also comes with male-pattern skeletal growth. So unless your body still has elevated/male-level T levels, you're carrying around a disproportionately heavy skeleton which negates the advantage. The male-pattern skeletal growth isn't necessarily a disadvantage. E.g., narrower hips and stronger bones is likely an advantage in running. > If the net effect were actually an advantage, you'd expect the womens…

> The male-pattern skeletal growth isn't necessarily a disadvantage. E.g., narrower hips and stronger bones is likely an advantage in running.

It might or might not help, but if it were a net benefit then you'd expect trans women runners to perform more strongly than they actually do.

> My understanding is the opposite. In fact, if it wasn't the case, there is basically no reason to have separate mens and womens fields.

This sentence seems to presuppose that trans women are men. There are some womens' divisions which allow trans women (typically with stipulations requiring some duration of HRT), and they are not dominant there. To me, the sensible conclusion seems to be that trans women perform roughly on par with cis women, not that cis women perform roughly on par with cis men.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#218
post #209

Earlier quoted context omitted.

Though that also comes with male-pattern skeletal growth. So unless your body still has elevated/male-level T levels, you're carrying around a disproportionately heavy skeleton which negates the advantage. If the net effect were actually an advantage, you'd expect the womens' sports which are allowing trans women to be dominated by them, but they really just aren't. Additionally, trans women on HRT typically have the…

> Though that also comes with male-pattern skeletal growth. So unless your body still has elevated/male-level T levels, you're carrying around a disproportionately heavy skeleton which negates the advantage. The male-pattern skeletal growth isn't necessarily a disadvantage. E.g., narrower hips and stronger bones is likely an advantage in running. > If the net effect were actually an advantage, you'd expect the womens…

This is anecdotal evidence but I'm a trans woman who transitioned at 30. I ran cross country and track and was the fastest kid at my school in a relatively competitive program. I got depressed after college and gained a bunch of weight and only ran sporadically. I started HRT, I keep my T levels in the lowest range that's healthy for cis women. I got the urge to start exercising again. I now run more than twice as much as before, lost 40 pounds, and do roller derby on top of that. I'm still not as fast as I was when I was mostly sedentary, drinking beers every night in my apartment. I don't know if I'm faster or slower than I would have been if I was a cis woman but I did take a pretty big hit.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#219

Earlier quoted context omitted.

metabolism is orthogonal . It's possible to have a fast metabolism and still be obese if you're eating at a surplus. But it's also possible people with faster metabolisms may be more successful at weight loss if already obese. So a 300-lbs person who eats 10,000 calories/day to be weight stable will find it easier to lose weight compared to to a 300 lbs person who is stable at 4,000 cal/day. This can also explain how…

10k calories a day is what a black bear eats preparing for hibernation. And it is what Michael Phelps would eat daily when training in the pool for hours on end. Obese people can remain obese eating 1000 calories a day. I recall one episode of My 600lb Life and the show's featured person that day was at 900 or 1200 calories a day and still didn't lose weight. Might have still been gaining. It is a dynamic system. Peo…

This is completely and obviously untrue.

Re: Adipose tissue retains an epigenetic memory of obesity after weight loss

#220

Earlier quoted context omitted.

Similar adaptions occur in muscle. The extent of new muscle fiber development (hyperplasia) is debated, so there are multiples factors influencing how muscle retains some memory of past strength ability. Once you’ve reached a level of physical strength it’s easier to return to that level in the future. This has been a topic of debate in the sports world because past anabolic steroid use could therefore carry benefits…

I can't remember exactly what I was listening to, maybe some kind of NPR podcast. But the doctor was mentioning that none of the influencers influencing young people to try T and Steroids (which is rampant right now) are ever mentioning that you are on a ticking clock to infertility as soon as you start this stuff. Some people can regain their fertility but it might take years, and some people are going to be permane…

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