Aging & Longevity News and Discussions

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Rapamycin is one of the most promising compounds currently studied for its potential anti-aging effects, but its status as the "closest" to a successful anti-aging pill or shot depends on how you define success, and there are important caveats to consider. Below, I’ll evaluate rapamycin’s role, its limitations, and what alternatives or developments might surpass it based on available evidence.

### Rapamycin’s Role in Anti-Aging
Rapamycin, an FDA-approved mTOR inhibitor originally used as an immunosuppressant for organ transplants, has shown significant promise in extending lifespan and healthspan (the period of healthy life) across various species, from yeast to mammals. It works by inhibiting the mTOR pathway, a key regulator of cell growth, metabolism, and autophagy (cellular cleanup), mimicking the effects of caloric restriction, which is known to extend lifespan in animal models. Key points about rapamycin include:

- **Evidence in Animals**: Rapamycin consistently extends lifespan in mice, even when administered late in life, and delays age-related diseases like cancer, cognitive decline, and cardiovascular issues. For example, studies show it can increase lifespan in mice by up to 14% and improve physiological parameters in immune, cardiovascular, and integumentary systems. A recent study found rapamycin’s life-extending effects are comparable to caloric restriction, unlike metformin, which showed no clear longevity benefit.[](https://www.thelancet.com/journals/lanh ... 1/fulltext)[](https://pmc.ncbi.nlm.nih.gov/articles/PMC6814615/)[](https://www.nature.com/articles/s43587-022-00278-w)
- **Human Studies**: Human data is limited, as rapamycin is not FDA-approved for anti-aging. However, off-label use at lower doses than those for transplantation suggests potential benefits, such as improved immune function and reduced age-related decline in healthy individuals. Anecdotal reports, like those from longevity researcher Bryan Johnson, indicate ongoing experimentation with rapamycin protocols, though results are inconclusive.[]([](https://www.thelancet.com/journals/lanh ... 1/fulltext)[](https://www.npr.org/transcripts/nx-s1-5008777)
- **Mechanisms**: Rapamycin promotes autophagy, reduces inflammation, and may protect against age-related diseases like Alzheimer’s and cancer by inhibiting mTOR. It’s also been shown to prevent age-related changes in rodents, dogs, non-human primates, and humans to some extent.[](https://www.sciencedirect.com/science/a ... 972031053X)[](https://getheally.com/patients/news/how ... anti-aging)[](https://www.frontiersin.org/journals/ag ... 48260/full)

### Limitations of Rapamycin
Despite its promise, rapamycin has significant drawbacks that prevent it from being a definitive anti-aging solution:
- **Side Effects**: At higher doses used for immunosuppression, rapamycin can cause side effects like dyslipidemia, glucose intolerance, and increased infection risk. While lower doses for anti-aging may reduce these risks, long-term safety in humans for this purpose is not well-established.[](https://www.nature.com/articles/cddis2014520)[](https://nutritionfacts.org/video/is-rap ... ging-drug/)
- **Limited Human Data**: Most evidence comes from animal studies, and human trials for anti-aging are sparse. The drug’s off-label use lacks rigorous, large-scale clinical data to confirm efficacy and safety.[](https://www.verywellhealth.com/rapamyci ... ug-8747905)
- **Not Universal**: Some studies suggest rapamycin’s effects on aging may be species- or context-specific, and its ability to slow aging itself (as opposed to extending lifespan) remains debated.[](https://www.dzne.de/en/news/press-relea ... g-effects/)
- **Delivery**: Rapamycin is typically administered orally (pill form), but its bioavailability can vary, and injections are less common. Dosing protocols (e.g., weekly low doses vs. high doses) are still being optimized.[]([](

Given these factors, rapamycin is a leading candidate but not a perfected anti-aging pill or shot. Its widespread use is limited by the need for more human data and better management of side effects.

### Alternatives to Rapamycin
Several compounds and approaches, both natural and in development, are being explored as potential alternatives or complements to rapamycin. These aim to replicate its benefits (e.g., mTOR inhibition, autophagy promotion) with fewer side effects or more targeted mechanisms. Below are notable alternatives:

#### 1. Natural Compounds Mimicking Rapamycin
Natural compounds that mimic rapamycin’s effects on mTOR or related pathways are being studied as safer alternatives. These include:
- **Resveratrol**: Found in red wine, resveratrol activates sirtuins (proteins linked to longevity) and may mimic caloric restriction. It has antioxidant and anti-inflammatory properties but less robust lifespan data than rapamycin.[](https://www.onegreenplanet.org/natural- ... -benefits/)
- **Curcumin**: A compound in turmeric, curcumin inhibits mTOR and reduces inflammation. Its anti-aging effects are promising but less studied than rapamycin.[](https://www.onegreenplanet.org/natural- ... -benefits/)
- **Quercetin**: A flavonoid with senolytic properties (targets senescent “zombie” cells that drive aging), quercetin may complement rapamycin by addressing different aging hallmarks.[](https://www.onegreenplanet.org/natural- ... -benefits/)[](
- **Green Tea Extract**: Contains EGCG, which may inhibit mTOR and promote autophagy, though evidence is preliminary.[](https://www.onegreenplanet.org/natural- ... -benefits/)
- **Omega-3 Fatty Acids**: Found in fish oil, these reduce inflammation and may support longevity, but their effects are less direct than rapamycin’s.[](https://www.onegreenplanet.org/natural- ... -benefits/)
- **Berberine**: Similar to metformin, berberine activates AMPK (a pathway complementary to mTOR) and may mitigate rapamycin’s side effects, like dyslipidemia, when used in combination.[](https://www.nature.com/articles/cddis2014520)

These natural compounds are appealing due to their accessibility and lower risk profiles, but their effects are generally weaker and less consistent than rapamycin’s in animal models.[](https://www.genengnews.com/topics/drug- ... ceuticals/)

#### 2. Rapalogs (Rapamycin Derivatives)
Rapalogs, or rapamycin analogs (e.g., everolimus, temsirolimus), are synthetic derivatives designed to improve on rapamycin’s specificity and reduce side effects. They also target the mTOR pathway and have shown promise in preventing age-related diseases and extending lifespan in preclinical studies. For example:[](https://www.aging-us.com/article/100479/text)[](https://www.oncotarget.com/article/18033/text/)
- **Everolimus**: Used in cancer and immunosuppression, everolimus has shown anti-aging effects in mice and is being explored for human applications. It may have a better safety profile than rapamycin at lower doses.[](https://www.thelancet.com/journals/lanh ... 1/fulltext)
- **Temsirolimus**: Primarily a cancer drug, it has potential anti-aging applications but is less studied for this purpose.

Rapalogs are in clinical use for other indications, so they could be repurposed for anti-aging faster than entirely new drugs, but human trials for longevity are still in early stages.

#### 3. Senolytics
Senolytics are drugs that selectively eliminate senescent cells, which accumulate with age and contribute to inflammation and tissue dysfunction. Examples include:
- **Dasatinib and Quercetin**: This combination has shown promise in clearing senescent cells in mice, improving healthspan and delaying age-related diseases. Human trials are underway, but results are preliminary.[](
- **Fisetin**: A flavonoid with senolytic properties, fisetin is being tested for its ability to improve healthspan in humans. It’s less potent than rapamycin in lifespan extension but targets a distinct aging mechanism.

Senolytics are exciting because they address a different hallmark of aging (cellular senescence) than rapamycin (mTOR inhibition), potentially offering complementary benefits. Clinical trials are ongoing, but they’re not yet as advanced as rapamycin’s evidence base.[](

#### 4. Metformin
Metformin, another FDA-approved drug (for diabetes), activates AMPK and has been studied for anti-aging due to its effects on metabolism and inflammation. However, recent studies suggest it’s less effective than rapamycin for lifespan extension, with no clear benefit in some animal models. The TAME trial (Targeting Aging with Metformin) is investigating its anti-aging potential in humans, but results are not yet available. Metformin may be a safer alternative for some due to its long history of use, but it’s currently considered less promising than rapamycin.[](https://pmc.ncbi.nlm.nih.gov/articles/PMC5723685/)[](https://www.sciencealert.com/scientists ... olong-life)

#### 5. NAD+ Boosters
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme critical for cellular energy and repair. NAD+ levels decline with age, and boosting them is a hot area of anti-aging research. Compounds include:
- **Nicotinamide Mononucleotide (NMN)**: NMN increases NAD+ levels and has shown healthspan benefits in mice, such as improved vascular function and energy metabolism. Human trials are ongoing, with some evidence of safety but mixed efficacy.[](https://www.nad.com/news/anti-aging-dru ... tudy-shows)
- **Nicotinamide Riboside (NR)**: Similar to NMN, NR boosts NAD+ and is being tested for cognitive and physical benefits in humans. It’s available as a supplement but lacks rapamycin’s robust lifespan data.

NAD+ boosters are promising for healthspan but have less evidence for lifespan extension compared to rapamycin. They’re also more accessible as supplements, though quality and efficacy vary.

#### 6. Gene Therapies and Novel Approaches
Emerging therapies in development may eventually surpass rapamycin by targeting aging at a deeper level:
- **Follistatin Gene Therapy**: This approach inhibits myostatin to preserve muscle mass and has shown potential in animal models for extending healthspan. However, it’s experimental and not yet in clinical use.[](
- **Sirtuin Activators**: Beyond resveratrol, synthetic sirtuin activators (e.g., SRT1720) are being developed to mimic caloric restriction more effectively. These are still in preclinical stages.
- **Telomerase Activation**: Therapies to lengthen telomeres (protective caps on chromosomes) aim to slow cellular aging but are highly experimental and face safety concerns like cancer risk.
- **AI-Driven Drug Discovery**: Neural networks are identifying novel compounds that mimic rapamycin’s effects with fewer side effects. These are in early development but could yield breakthroughs.[](https://www.genengnews.com/topics/drug- ... ceuticals/)

### What’s Better in Development?
No single compound or therapy in development definitively surpasses rapamycin yet, as most are in earlier stages with less robust data. However, the following approaches hold significant promise:
- **Rapalogs with Improved Safety**: Everolimus and other rapalogs may offer similar benefits to rapamycin with reduced side effects, making them strong contenders if human trials confirm efficacy.
- **Senolytics**: Drugs like dasatinib + quercetin or fisetin could complement rapamycin by targeting senescent cells, potentially offering a more comprehensive anti-aging strategy. Phase 2 trials are showing early promise.
- **Combination Therapies**: Combining rapamycin with other agents (e.g., berberine, statins, or NAD+ boosters) could mitigate side effects and enhance benefits. For example, statins may counteract rapamycin’s dyslipidemia, creating a more balanced anti-aging formula.[](https://www.nature.com/articles/cddis2014520)
- **Personalized Longevity Interventions**: Advances in AI and genomics may lead to tailored therapies that outperform rapamycin by targeting individual aging pathways more precisely.[](https://www.genengnews.com/topics/drug- ... ceuticals/)

### Conclusion
Rapamycin is currently the closest we have to a successful anti-aging pill due to its robust lifespan extension in animal models, growing evidence in humans, and established use as an FDA-approved drug. However, its side effects, limited human data, and lack of FDA approval for anti-aging purposes mean it’s not a perfect solution. Natural alternatives like resveratrol or quercetin are safer but less potent, while rapalogs, senolytics, and NAD+ boosters are promising but less advanced. In development, combination therapies and AI-driven drug discovery hold the most potential to surpass rapamycin by offering targeted, safer, and more effective interventions. For now, rapamycin remains a leading candidate, but ongoing research may yield better options in the next 5–10 years.

If you’re considering rapamycin or alternatives, consult a healthcare provider, as off-label use carries risks. For updates on emerging therapies, check clinical trial databases like ClinicalTrials.gov or follow longevity research communities on platforms like X.[](https://www.verywellhealth.com/rapamyci ... ug-8747905)

[wjfox]

[wjfox]

Intensely grieving a loved one could shorten a mourner's life

Feeling profound grief years after a loved one has died could affect our own longevity

By Carissa Wong
25 July 2025

People who experience long periods of intense grief after the death of a loved one seem to have a higher risk of dying within the next decade than those who come to terms with their loss more easily.

Numerous studies have linked bereavement to poor health outcomes, such as raised blood pressure. But most of these only tracked the bereaved for a few years after their loss, says Andreas Maercker at the University of Zurich in Switzerland, who wasn’t involved in the latest research.

Now, Mette Kjærgaard Nielsen at Aarhus University in Denmark and her colleagues have examined how grief is linked to mortality up to a decade later.

[...]

The death rate in the high-grief group was 88 per cent greater than in the low-grief one.

“There’s a saying that bereavement breaks hearts,” says Maercker. The findings support the idea that prolonged, intense grief puts a strain on the body, leading to earlier death, he says. It may also bring about lifestyle changes, as bereaved people might be more likely to skip meals or be inactive.

https://www.newscientist.com/article/24 ... ners-life/

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https://www.medrxiv.org/content/10.1101 ... 25331038v1

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[Lilymoon]

Aging Might Travel Through Your Blood and This Protein Is Behind It

Researchers identify a molecular “messenger” that spreads cellular aging between organs.

For years, scientists have known that aging begins in the smallest units of life: cells. But what turns this cellular decline into a whole-body unraveling has been harder to explain.

Now, a team of researchers in South Korea says it has found one of the clearest answers yet. The researchers at Korea University’s College of Medicine report that a single molecule — called reduced High Mobility Group Box 1, or ReHMGB1 — can act like a courier for aging, carrying “senescence signals” from cell to cell through the bloodstream.

“This study reveals that aging signals are not confined to individual cells but can be systemically transmitted via the blood, with ReHMGB1 acting as a key driver,” said Ok Hee Jeon, the study’s senior author.

https://www.zmescience.com/science/news ... behind-it/

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Aging skin rejuvenated by young blood and bone marrow
By Paul McClure
August 10, 2025

From vampire legends to lab-grown tissue, the idea that young blood can reverse aging is no longer pure myth. A new study shows that proteins secreted by bone marrow cells, triggered by young blood, can rejuvenate aging skin in the lab.

According to lore, vampires drink the blood of the young to maintain their vitality. In a similar vein (pun intended), the 16th-century Hungarian countess Elizabeth Báthory was rumored to have bathed in the blood of young girls to preserve her youth. Then there’s the widespread QAnon conspiracy claiming that a global cabal of pedophiles is drinking the blood of children to gain immortality.

Well, science may well have caught up with myth. A new study out of Germany, led by the Research and Development arm of skin care company Beiersdorf AG, has examined whether young human blood contains factors that can rejuvenate aging skin. In short, they found that it can – but only in the presence of blood marrow cells.

https://newatlas.com/aging/young-blood- ... uvenation/

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https://www.sciencedirect.com/science/a ... 7425005719
https://www.eurekalert.org/news-releases/1088662

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Anti-aging medicine just gained 371 entirely new genetic targets
By Bronwyn Thompson
August 21, 2025

In a groundbreaking study, scientists have mapped the most detailed genetic blueprint yet of frailty – the age-related decline in resilience that affects around 40% of people aged 65 and above, dramatically increasing the risk of hospitalization, disability and death. The findings offer new hope in the development of effective anti-aging therapies.

In the largest study of its kind, University of Colorado Boulder (CU Boulder) researchers led an international team that analyzed the DNA of more than 400,000 people, focusing on six key areas of frailty: physical strength, mobility, cognition, mood, cardiovascular health and nutritional status. Together, they paint a clear picture of how our bodies lose resilience over time – and some faster than others.

"Aging is not just one thing," said the study's co-author Dr. Kenneth Rockwood, a leading expert in frailty, based at Dalhousie University in Nova Scotia. "There are many ways to be frail. The question then becomes: What genes are involved?"

https://newatlas.com/aging/anti-aging-genes-frailty/

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[wjfox]

More clickbait from Popular Mechanics, masquerading as "news".

The study is from nearly 5 years ago.

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Experiencing heatwaves may make you age faster

25 August 2025

Sweltering heatwaves can have lasting health impacts – accumulated exposure to hot-weather days appears to accelerate people’s biological ageing.

“We now have at least two prominent studies showing an impact of heatwave exposure on ageing, with these examining populations from two different countries,” says Paul Beggs at Macquarie University in Australia. “We all need to take heatwaves seriously – not only looking after our own health but also that of others in our communities.”

The newest research comes from Siyi Chen at The University of Hong Kong in China and her colleagues. First, the researchers used medical screening data from nearly 25,000 adults in Taiwan to determine the biological age of each person based on factors such as inflammation, blood pressure and organ functions. Next, they compared each individual’s biological age with their chronological age, to figure out if they were ageing faster or slower than normal.

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For the Taiwanese group, the ageing effect generally increased as the amount of cumulative heatwave exposure did. Each four-day increase in total heatwave duration was associated with a biological age increase equivalent to about nine days.

But the effect was even more pronounced for specific groups of people. For instance, manual workers experienced around three times as much accelerated ageing from the same amount of heat exposure compared to the group as a whole. Residents of rural communities also experienced greater ageing impacts, indicating access to air conditioners might be able to stave off heat’s ageing effects, the researchers say.

https://www.newscientist.com/article/24 ... ge-faster/