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Intermittent Fasting

@ifdiet.bsky.social
237 followers 59 following 31 posts

Steve Mount on intermittent fasting, metabolic health, aging and longevity, with a focus on the science. Intermittent fasting is sustainable; I've been at it for over 20 years.

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Eric Topol @erictopol.bsky.social · 30/09/2026
Why do our cells age? It's not just wear and tear, accumulated damage. Loss of cell identity takes center stage. A new Nature paper and connection with prior work that substantially advances the science of aging. In the new Ground Truths. erictopol.substack.com/p/loss-of-ce...
erictopol.substack.com
Loss of Cell Identity Drives Human Aging
That’s What Biological (Epigenetic) Aging Clocks Are Measuring
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Eric Topol @erictopol.bsky.social · 19/09/2026
Your wearable or mattress sensor is giving you your HRV and a "Readiness" score every day? What are these metrics and do they have value? erictopol.substack.com/p/the-big-ho...
erictopol.substack.com
The Big Holes in Wearable Heart Rate Variability And Readiness Scores
A Gaping Lack of Evidence for Health Benefits
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Intermittent Fasting @ifdiet.bsky.social · 19/09/2026
Eric Topol on HRV (heart rate variability) as used by fitness trackers. He is, as usual, insightful and informative. I plan to post about this myself (Whoop vs. Fitbit) sometime soon. erictopol.substack.com/p/the-big-ho...
erictopol.substack.com
The Big Holes in Wearable Heart Rate Variability And Readiness Scores
A Gaping Lack of Evidence for Health Benefits
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Gregg Gonsalves @gregggonsalves.bsky.social · 17/06/2026
Your daily reminder. Like a Soviet commissar, Russell Vought wants to take over ALL federal grant-making from Meals on Wheels to cancer research. We can stop him. But it means everyone taking action. Write to your members of Congress today. actionnetwork.org/letters/oppo...
actionnetwork.org
Oppose OMB Proposal to Put ALL Federal Government Funding Decisions in the Hands of Political Appointees
On May 29, 2026, the Office of Management and Budget issued a Notice of Proposed Rulemaking (NPRM), OMB-2026-0034, Regulation for Federal Financial Assistance. The scope of this proposed regulation is...
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Intermittent Fasting @ifdiet.bsky.social · 06/06/2026
Exactly right! From WaPo: "… the [ADA]: people were removed 'for violating the conference code of conduct … that all participants will conduct themselves in a professional and respectful manner. … not consistent with this code of conduct.'" Handing out reprints at at meeting is unprofessional.
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Coleen Murphy @ctmurphy1.bsky.social · 05/06/2026
diabetesjournals.org/care/article...
diabetesjournals.org
Misguided Brushes of a Pen Continue to Dismantle and Destroy Biomedical Research in the United States: We Can No Longer Afford Complacency and Fear. We Must All Act Now!
The opinions expressed in this editorial are the personal views of the authors (S.E. Kahn, C.A.M. Anderson, J.B. Buse, and E. Selvin) and do not represent
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Intermittent Fasting @ifdiet.bsky.social · 06/06/2026
The editorial: diabetesjournals.org/care/article... The WaPo article: www.washingtonpost.com/health/2026/...
diabetesjournals.org
Misguided Brushes of a Pen Continue to Dismantle and Destroy Biomedical Research in the United States: We Can No Longer Afford Complacency and Fear. We Must All Act Now!
The opinions expressed in this editorial are the personal views of the authors (S.E. Kahn, C.A.M. Anderson, J.B. Buse, and E. Selvin) and do not represent
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Intermittent Fasting @ifdiet.bsky.social · 29/03/2026
Also, during my 22 years of intermittent fasting, I've spoken to a lot of people who tried it. Some get very low blood sugar, some get very irritable, some fully compensate or overcompensate, and so don't lose weight. People need to find what works for them (and what doesn't work for them).
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Intermittent Fasting @ifdiet.bsky.social · 29/03/2026
I was very influenced by a study showing huge variation between individuals in glycemic response. www.cell.com/cell/fulltex...
cell.com
Personalized Nutrition by Prediction of Glycemic Responses
People eating identical meals present high variability in post-meal blood glucose response. Personalized diets created with the help of an accurate predictor of blood glucose response that integrates ...
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Intermittent Fasting @ifdiet.bsky.social · 29/03/2026
What I'm interested in is differences between individuals in response. For saturated fat, there is Denke et al. (PMID 11105179) and the RISSCI study (PMID 39111551). Denke et al. shows that interindividual variation is reproducible. This waterfall plot is from the RISSCI study.
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Intermittent Fasting @ifdiet.bsky.social · 27/03/2026
I've been reading you for many of those years. I generally agree with you, sometimes adamantly. But I note that you want to make an exception on salt for people with low blood pressure (like yourself), and don't mention an exception on saturated fats for those with low LDL cholesterol.
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Intermittent Fasting @ifdiet.bsky.social · 27/03/2026
Tamar Haspel lists 3 pieces of nutrition advice you can count on. One is: "Most saturated fat raises heart disease risk" Her argument: most saturated fat raises LDL cholesterol, and LDL is causal for heart disease. But what about people whose LDL cholesterol is in the healthy range? wapo.st/3O10Xds
wapo.st
Column | Nutrition advice is often unreliable. Here are 3 things you can count on.
Most dietary guidance relies on lousy evidence. How are we supposed to know what to eat?
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
The 4-7-8 breathing technique (breathe in 4 seconds, hold for 7, and exhale for 8) sounds promising, and I've started to try it. Anahad O'Conner says that it works for him, and it can't hurt.
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
Contrary to what he says, my pulse rate does not need to go below 60 for me to fall asleep. Most nights, it never goes below 60, and many nights it stays above 70 (the long term average of my nightly minimum is 67, SD 4.6). Furthermore, the time I wake up is not a time of rising pulse rate.
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
Non-sleep deep rest is good. Over the years I have mastered non-sleep deep rest. My pulse rate can reach its lowest point, and my Fitbit calls this light sleep. But I am definitely awake; I maintain a train of conscious thought. I hear sounds, and if my wife says something, I respond.
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
He advises against getting up to go to the bathroom. I used to think that way, and I had a series of urinary tract infections, which were much worse than the sleep deprivation would have been. I do avoid light or any activity that is engaging.
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
I do look at the clock. I want to know if it's too early to get up. Knowing the time does not make me at all anxious (which is his concern). This is perfectly ordinary. I'm up at 3 am most nights and I know what to do.
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
This YouTube by Michael Breus, is very informative about waking up at night, but is includes some advice that isn't right, at least not for me. I'll address six points in my replies. www.youtube.com/watch?v=zpdR...
youtube.com
How to fall back asleep in the middle of the night
YouTube video by Sleep Doctor
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Intermittent Fasting @ifdiet.bsky.social · 25/03/2026
I wake up most mornings at 3 or 4, and sometimes lay awake for long time. Anahad O'Conner at the Washington Post has exactly the same sort of insomnia! www.washingtonpost.com/wellness/202... Most of his piece references Michael Breus, "The Sleep Doctor." I'll talk about his advice in my next post.
washingtonpost.com
5 tips for when you’re wide awake at 3 a.m.
Middle-of-the-night insomnia is common. These techniques might help.
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Reposted by Intermittent Fasting
Gregg Gonsalves @gregggonsalves.bsky.social · 23/03/2026
A blockbuster expose by @jeneeninterlandi.bsky.social on RFK's CDC. Read it. Get angry. And get on the phones to your elected members of Congress. www.nytimes.com/interactive/...
nytimes.com
Inside the Turmoil at RFK Jr.’s CDC, as Told by Current and Former Employees
Forty-three current and former C.D.C. employees on the changes they say are replacing science with ideology — and making Americans more vulnerable.
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Intermittent Fasting @ifdiet.bsky.social · 23/06/2025
Alternate day fasting (which I've done for 21 yrs) seems best. "more substantial weight losses ... accompanied by reductions in visceral fat and cardiometabolic improvements." "lowered total cholesterol, triglycerides, and non-high density lipoprotein" www.bmj.com/content/389/...
bmj.com
Intermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trials
Objective To assess the effect of intermittent fasting diets, with continuous energy restriction or unrestricted (ad-libitum) diets on intermediate cardiometabolic outcomes from randomised clinical ...
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Intermittent Fasting @ifdiet.bsky.social · 18/04/2025
This is a very important story. The government essentially censored news reports about a taxpayer-funded study because they feared that it might reflect badly on RFK Jr.
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Eric Topol @erictopol.bsky.social · 14/03/2025
On the cyclic benefits of intermittent fasting and metabolic switching, this is an outstanding new perspective @naturemetabolism.bsky.social www.nature.com/articles/s42...
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Intermittent Fasting @ifdiet.bsky.social · 26/03/2025
Varady remains unconvinced of effects independent of calorie restriction. “... I don’t think that there are any benefits ... beyond weight loss,” she says. Mattson is equally sure of the opposite: “... considerable evidence of benefits ... that cannot be explained by reduction in calorie intake.”"
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Magdalena Skipper @magdalenaskipper.bsky.social · 26/03/2025
Everything you ever wanted to know about the science behind intermittent fasting… as always, many questions remain open but there are suggestions that its effects might not be simply a function of calorie restriction… 🧪 @nature.com www.nature.com/articles/d41...
nature.com
Fasting for weight loss is all the rage: what are the health benefits?
Intermittent fasting has gained a following, in part because of tantalizing hints that it can boost cognition, fend off cancer and even slow ageing.
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Intermittent Fasting @ifdiet.bsky.social · 21/03/2025
If you are a scientist, or a nutritionist who follows the science, and you think beef tallow is healthier than seed oils, or if you just avoid seed oils, tell me why. I'm looking for citations.
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Intermittent Fasting @ifdiet.bsky.social · 11/01/2025
Wake up and drink your coffee! "Lower risks of all-cause mortality and cardiovascular mortality were observed in people who mostly drank coffee in the morning." If you keep drinking coffee all day, not so much. www.medpagetoday.com/primarycare/...
medpagetoday.com
Coffee Drinking Tied to Better Survival, but Timing Matters
Lower risk of all-cause and cardiovascular mortality observed only among morning drinkers
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Gregg Gonsalves @gregggonsalves.bsky.social · 09/01/2025
There is no scenario where RFK Jr should be anywhere near HHS. Reporters, pundits and politicians trying to normalize this nomination are complicit in the coming disaster his rise represents. www.nbcnews.com/news/amp/rcn...
nbcnews.com
Thousands of doctors urge Senate to block RFK Jr. as health secretary for Trump administration
Their letter calls the choice of Robert F. Kennedy Jr., who is known for promoting false medical claims, “a slap in the face” to health care professionals.
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Intermittent Fasting @ifdiet.bsky.social · 09/01/2025
The short-chain fatty acids (SCFAs) have beneficial health effects, are produced by microbial metabolism and are unique acyl lysine histone marks. These papers show that the last bit is important; it's a mechanism by which the microbiome alters gene expression.
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Intermittent Fasting @ifdiet.bsky.social · 08/01/2025
Interest in intermittent fasting appears to be lessening. There is an annual peak in Google searches right around this time of year, with the highest being 2020. Maybe this reflects the fact that most people already know what they want to know.
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Intermittent Fasting @ifdiet.bsky.social · 15/12/2024
I agree. It would greatly simplify planning meetings with remote participation. But there still has to be agreement on standard times. Are the 9-to-5ers going to be 16:00-24:00 or 17:00-1:00? Would people ever use UTC for things like store hours? It reminds me of conversion to metric.
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Intermittent Fasting @ifdiet.bsky.social · 15/12/2024
I would favor allowing states to decide. Maybe Illinois wants to be Eastern with no time change, Alaska wants a time change, Florida wants Atlantic time (aka Eastern with permanent daylight savings). Let them.
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Gregg Gonsalves @gregggonsalves.bsky.social · 13/12/2024
And you want something to do? WRITE AND CALL YOUR SENATORS NOW.
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Intermittent Fasting @ifdiet.bsky.social · 13/12/2024
The cardioprotective and anti-arthritic consequences of fasting are reported to depend on spermidine, acting via autophagy induction and hypusination of the translation regulator eIF5A. www.nature.com/articles/s41...
nature.com
Spermidine is essential for fasting-mediated autophagy and longevity - Nature Cell Biology
Hofer et al. show that fasting promotes the synthesis of spermidine, which stimulates eIF5A hypusination to induce autophagy and increase lifespan in various species in a conserved manner.
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Gregg Gonsalves @gregggonsalves.bsky.social · 13/12/2024
And now this. My father had polio when he was a child in the 1930s. He thankfully survived. Many did not. This is, well, evil. Let's not mince words. www.nytimes.com/2024/12/13/h...
nytimes.com
Kennedy’s Lawyer Has Asked the F.D.A. to Revoke Approval of the Polio Vaccine
Aaron Siri, who specializes in vaccine lawsuits, has been at Robert F. Kennedy Jr.’s side reviewing candidates for top jobs at the Department of Health and Human Services.
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Coleen Murphy @ctmurphy1.bsky.social · 05/12/2024
www.cell.com/cell-genomic...
cell.com
Adult single-nucleus neuronal transcriptomes of insulin signaling mutants reveal regulators of behavior and learning
St. Ange et al. provide a single-nucleus RNA sequencing atlas of adult wild-type and IIS mutant Caenorhabditis elegans neurons, identifying genes that turn on from L4 to adulthood, including GPCRs. Functional behavior experiments revealed the roles of genes expressed in single neurons, including previously unidentified IIS targets.
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Intermittent Fasting @ifdiet.bsky.social · 02/12/2024
Changes in RNA structure (3' UTR, alternative splicing) and base modifications with age in C. elegans, a new paper from Schiksnis et al. (Pasquinelli lab) This new paper is at the intersection of my core scientific interest (RNA processing) and aging. academic.oup.com/nar/advance-...
academic.oup.com
Full-length direct RNA sequencing reveals extensive remodeling of RNA expression, processing and modification in aging Caenorhabditis elegans
Abstract. Organismal aging is marked by decline in cellular function and anatomy, ultimately resulting in death. To inform our understanding of the mechani
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Intermittent Fasting @ifdiet.bsky.social · 28/11/2024
The WaPo article is largely based on Oh et al. in Nature. pubmed.ncbi.nlm.nih.gov/38057571/ "Accelerated heart aging ... 250% increased heart failure risk and accelerated brain and vascular aging predict Alzheimer's disease (AD) progression independently from and as strongly as plasma pTau-181."
pubmed.ncbi.nlm.nih.gov
Organ aging signatures in the plasma proteome track health and disease - PubMed
Animal studies show aging varies between individuals as well as between organs within an individual<sup>1-4</sup>, but whether this is true in humans and its effect on age-related diseases is unknown....
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Intermittent Fasting @ifdiet.bsky.social · 28/11/2024
You want to look at the original article in Nature. pubmed.ncbi.nlm.nih.gov/38057571/ They did use machine learning models. "nearly 20% of the population show strongly accelerated age in one organ and 1.7% are multi-organ agers. Accelerated organ aging confers 20-50% higher mortality risk."
pubmed.ncbi.nlm.nih.gov
Organ aging signatures in the plasma proteome track health and disease - PubMed
Animal studies show aging varies between individuals as well as between organs within an individual<sup>1-4</sup>, but whether this is true in humans and its effect on age-related diseases is unknown....
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Intermittent Fasting @ifdiet.bsky.social · 28/11/2024
This was on the first page of the print Washington Post today. It's a long article about research into the way different organs age at different rates. These ages can be inferred from plasma proteins. People are described as 'heart agers' or 'brain youthers'.
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Intermittent Fasting @ifdiet.bsky.social · 27/11/2024
This is striking: "the effect of combined lifestyle interventions on type 2 diabetes risk partly persisted for many years after the intervention was withdrawn"
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Lamming Lab @lamminglab.bsky.social · 27/11/2024
Pleased to announce the publication of our new manuscript, "Late-life protein or isoleucine restriction impacts physiological and molecular signatures of aging" in Nature Aging today! www.nature.com/articles/s43... Free link: rdcu.be/d1DGk
nature.com
Late-life protein or isoleucine restriction impacts physiological and molecular signatures of aging - Nature Aging
Yeh et al. explore the effects of restricting dietary protein, or isoleucine specifically, in aged mice. They uncover benefits to metabolic health and certain indicators of aging and a sexually dimorp...
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Agingdoc⭐David Barzilai🔔MD PhD, MS, MBA, DipABLM @agingdoc.bsky.social · 26/11/2024
SHADES OF BLUE Blue zones, supposed havens of longevity, have become a global brand. But skeptics think they rest on shaky science www.science.org/content/arti...
science.org
Do ‘blue zones,’ supposed havens of longevity, rest on shaky science?
Critics say extraordinary life spans reflect faulty record keeping, not healthy lifestyles
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Intermittent Fasting @ifdiet.bsky.social · 23/11/2024
The life span extension of mutations in insulin pathway genes in C. elegans was an important component of my thinking when I started intermittent fasting. It still is.
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Alan Gerber @alangerber.bsky.social · 23/11/2024
Post a non-religious photo you think of as holy.
Figure showing the chromatographic resolution of the three nuclear DNA-dependent RNA polymerases from
Sea urchin embryos (Bob Roeder, 18 Feb 1969).
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Peter Sudmant @psudmant.bsky.social · 16/09/2023
New review from grad student Stacy Li, postdoc Manny Vazquez, and I www.cell.com/trends/genet... - super proud of their hard work!
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