Journalist in UK (Daily Telegraph health pages) is looking for case studies

[Kate]

Looking for one case study who has used CR long term and another who is just figuring it out. We would like to take photographs if possible. I am happy to give quote approval. My number is +447712007020. Looking forward to hearing from you soon. I am writing this piece off the back of research published in Nature Aging recently. https://www.nature.com/articles/s43587-022-00357-y

I have also spoken to multiple academics in the field of aging and caloric restriction research.

Many thanks, Kate

 

Edited February 15, 2023 by Kate

[Gordo]

Sorry, everyone on long term cr either stopped it, died, or got too frail or sick to make public appearances 😉

 

[Ron Put]

6 hours ago, Gordo said:

Sorry, everyone on long term cr either stopped it, died, or got too frail or sick to make public appearances 😉

 

I have been here for close to 4 years, and still haven't figured out what exactly is a good definition of CR, as practiced here.

It's restricting calories, OK, but compared to what exactly?

Is it compared to eating ad libitum, and if so, at what stage of life or at what weight? If someone obese reduces their calories, most would call it a diet, not CR.

Is it BMI? I can think of at least one person here who claims that he is on CR, but then have a BMI in the mid-20s. I believe him, but I question the benchmark.

I personally do not consider myself as being on CR, yet I do track what I eat on Cronometer (mainly because of nutrients, but calories matter to me too), and my BMI is 18.5-19 on most days. This is where I was when 20 years old, and if CR means I have to be down 10%-20% from that, then I doubt many are indeed practicing CR.

For what it's worth, it appears that hunter gatherers hover around BMI 19-19.5 and at least some rural pastoralists have lower BMI than that.

Perhaps Dean fit the definition in the past, or even today, but then I know nothing about his long-term lifestyle and weight history.

In any case, there has to be some firmer definition of CR before there can be a reasonable discussion of who is on it and who is not.

[Dean Pomerleau]

Kate reached out to me. I pointed her to Michael Rae. He is the definition of hardcore CR in my book. 

[Gordo]

1 hour ago, Dean Pomerleau said:

Kate reached out to me. I pointed her to Michael Rae. He is the definition of hardcore CR in my book. 

It would be nice if he would check in once a year with pictures and a health update for the sake of science and all who are interested in CR. 

He has said in the past "if you're  not hungry all the time you aren't doing CR" so maybe that's the definition haha.  But "optimal nutrition" is also part of it.  Paul McGlothin sort of came up with his own definition in his book The CR Way but I haven't seen any pictures or health updates from him either in a very long time.  After all these years there still isn't much evidence favoring serious CR (compared to healthy diet and exercise without serious CR) and there have been plenty of anecdotes of harm from it. 

[Saul]

13 hours ago, Gordo said:

Sorry, everyone on long term cr either stopped it, died, or got too frail or sick to make public appearances 😉

 

Bullshit.

  --  Saul

[Gordo]

11 hours ago, Saul said:

Saul

Saul I know you are older, but do you know what a winking smiley face means?

Here let me help you: https://googlethatforyou.com?q=what does winking smiley face mean%3F

[Gordo]

That said, even though my reply was originally posted as a joke, now I'm sort of wondering if it might actually be true?

Of the original core group that did hard core longer term CR I can only think of a few names, Dean now eats like 3,000 calories a day, we haven't heard from Michael in a while but I've been told his diet damaged his thyroid, no idea if he has had any other issues, Al and Saul and Paul all have osteoporosis, didn't Al have a heart attack last year? Matt is fighting for his life with a deadly bacterial infection, Paul doesn't answer inquiries on his own website/forum anymore, and of course the godfather of CR Roy Walford himself died at age 79.  A reporter asks for just ONE case study of long term CR to step forward and gets crickets, haha.  Saul why don't you volunteer for this reporter?  I would definitely read that article!

[IgorF]

On 3/14/2023 at 11:27 AM, Ron Put said:

and still haven't figured out what exactly is a good definition of CR, as practiced here.

I wondered if there is a kind of common definition and since we have a cheap way to have (I know, in many cases imprecise) answer:

 

 

hello ChatGPT, I have a question for you)

 

What is your question?

 

what is Calorie Restriction definition? are there many?

 

Calorie restriction is the practice of limiting calorie intake in order to achieve health benefits and prolong life. There are several different types of calorie restriction diets, such as intermittent fasting, alternate-day fasting, and the 5:2 diet.

 

is this addition "in order to achieve health benefits and prolong life" a strong part of the definition? I mean - what if it is practised in a way that does not create health benefits or create harm?

 

Yes, the addition "in order to achieve health benefits and prolong life" is an important part of the definition of calorie restriction. However, it is important to note that there are different ways of practicing calorie restriction, some of which may not create health benefits or create harm.

 

 

Soooo, I think this could be a good enough way to describe it - to lower calories intake as much as possible to stick into the window where there are (measurable?) health benefits and there is no (confirmable!) harm to the health happens.

 

This will be a pure qualitative way to define it since quantitative way with "ad libitum" is not quantitative enough and due to enormous variability of dependent things it is impossible to give a good quantitative answer without writing a foliant. Or maybe I can't do it and it is already done somewhere..

 

Br,

Igor

[Sibiriak]

Quote

[...]Michael Rae's definition of serious "CR" [...]:

• A person is CR'd if  they restrict caloric intake while maintaining adequate nutrition so that he/she  weighs at  least 15% less than his/her biological setpoint weight.

• Biological setpoint  weight  is defined as  the weight to which one tended to remain stably when in  one's early twenties, and that was within the healthy BMI range.

(It is interesting how "adequate nutrition" came to replace "optimal nutrition" in CR definitions.)

Cf.How Many Calories Should I Eat? What's My Goal Weight? What's My Setpoint? What "%CR" Am I?

Michael Rae adheres to the "calories, calories, calories" position;  in contrast,  Dean Pomerleau argues for the "net calories" theory.

https://www.crsociety.org/topic/11977-cronometer-results-for-the-fmd/page/5/#comment-36688

 

Edited March 15, 2023 by Sibiriak

[Saul]

On 2/15/2023 at 12:22 PM, Kate said:

Looking for one case study who has used CR long term and another who is just figuring it out. We would like to take photographs if possible. I am happy to give quote approval. My number is +447712007020. Looking forward to hearing from you soon. I am writing this piece off the back of research published in Nature Aging recently. https://www.nature.com/articles/s43587-022-00357-y

I have also spoken to multiple academics in the field of aging and caloric restriction research.

Many thanks, Kate

 

Hi Kate!

I've been on CR for almost 50 years, and am 83and in excellent health, teaching Mathematics full time at the University of Rochester in Rochester, NY.  I'll be writing a research book this coming Summer for De Gruyter in Germany.

I'd be interested in volunteering.

  --  Saul