Wednesday, July 22, 2026

How Fasting Can Slow Down Aging

Dietary trends such as ketogenesis and intermittent fasting are currently extremely popular due to their rapid weight loss effects. However, scientists are now beginning to find out how they can actually help the body in other ways. In fact, a molecule produced during fasting has recently been found to provide the vascular system with a longevity boost, which will, in turn, slow down the aging process of the entire body.

While fasting, the human body enters a metabolic state called ketosis, which means that the body begins to rely on fat instead of glucose as a source of energy. One of these energy sources, collectively known as ketones, is a molecule called β-Hydroxybutyrate.

According to senior study author Dr. Ming-Hui Zou, "previously, studies on ketone bodies focused on energy metabolism, but this study showed that there are other physiological effects which regulate cell cycle to retardate aging progression."

A previous study, carried out at Harvard University in 2017, found that the activity of mitochondrial networks inside our cells can become altered due to fasting, in turn leading to better health, slower aging, and an increased lifespan.

Zou's study, though, aims to explore how high levels of β-Hydroxybutyrate might display similar effects by interfering with senescent cells, which are cells that are unable to divide or multiply. 

The team discovered that β-Hydroxybutyrate actually slows down these senescent vascular cells at the perfect moment, which prompts them to divide, thereby preventing them from aging. When tested on mice, the team discovered that it was also able to keep blood vessels young by promoting stem cell factors that protect against DNA-related senescence.

"We think this is a very important discovery, and we are working on finding a new chemical that can mimic the effect of this ketone body's function," said Zou. 

"We're trying to take the global approach to reducing cardiovascular disease and Alzheimer's disease. It's difficult to convince people not to eat for the next 24 hours to increase the concentration of this compound, and not everybody can do that, but if we can find something that can mimic this effect and people can still eat, it would make life more enjoyable and help fight disease."


This is only for your information, kindly take the advice of your doctor for food, medicines, exercises and so on.   


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posted by G S Iyer at 9:51 AM 0 comments

Dancing May Just Be the Single Best All-Round Activity After 60

 Walk down the supplement aisle and you will find an entire wall of promises. Bottles pledging sharper memory, stronger joints, better immunity, more energy, and a longer life. Many of us end up with a shelf of them at home, taken faithfully every morning, at a cost that quietly adds up to hundreds of dollars a year.

So which ones are genuinely doing something, and which are expensive urine? The honest answer is that a small number are genuinely valuable for people over 60, several are worth taking only if you actually need them, and a surprising number of the most heavily advertised have been tested properly and found to do very little. A few can even do harm. Here is a clear-eyed look at where the evidence stands. 

The One Principle That Sorts Everything Out 

Before any list, this idea does most of the work. Supplements are very good at correcting a shortage. They are not good at giving a well-nourished body an upgrade.

If you are genuinely low in a nutrient, topping it up can make a real difference to how you feel and function. If you are not low, taking more of it generally does nothing useful, because your body simply disposes of the excess or, with certain vitamins, stores it in ways you would rather it did not. This single distinction explains nearly every finding in the research: supplements shine in people with a deficiency and disappoint in people without one. 

Which leads to the most useful question you can ask about any bottle: what shortage is this correcting, and do I actually have it? 

Genuinely Worth It: Vitamin B12

If there is one supplement with a strong case after 60, this is it, and the reason is biological rather than promotional. As we age, the stomach produces less of what is needed to pull B12 out of food, so you can eat a perfectly good diet and still fall short. Estimates vary, but a meaningful share of adults over 60 are deficient, and many more sit at borderline levels. 

Your risk is higher if you take metformin for diabetes, take acid reflux medication such as a proton pump inhibitor, follow a vegetarian or vegan diet, or have a condition affecting absorption. That covers an awful lot of people. 

What makes B12 particularly worth knowing about is that a shortage looks uncannily like ordinary aging: fatigue, weakness, numbness or tingling in the hands and feet, unsteadiness, low mood, and memory trouble. People sometimes accept these as the years catching up when a simple blood test and an inexpensive tablet would help considerably. It is also reassuringly safe, with no established harm even at generous doses. Ask for the blood test rather than guessing. 

Worth It If You Need It: Vitamin D
Vitamin D is the most commonly recommended supplement for older adults, and it has a genuine basis. Skin makes less of it with age, many of us spend little time in the sun, and low levels are common, particularly in those who are housebound, live in northern climates, cover up outdoors, or have certain chronic conditions. 

Here is where honesty is required, though, because vitamin D has been oversold. Large trials in generally healthy older adults who were not selected for deficiency have found that supplementation did not meaningfully reduce fractures. It is not the universal protective shield the marketing suggests.

The sensible position is this: if your level is low, correcting it is worthwhile and inexpensive. If it is normal and you get reasonable sun exposure, more is unlikely to help. Again, this is settled with a blood test rather than assumption, and your doctor can advise on the right dose. 

Worth It If You Are Falling Short: Protein
This is the one that gets overlooked, and it may matter more than most of the vitamins on the shelf. Muscle loss is one of the central threats to independence as we age, and older adults frequently eat less protein than they need, often because appetite fades, cooking for one feels like a bother, or chewing has become harder. 

Food remains the best source, with eggs, fish, dairy, beans, lentils, and poultry all doing the job well. But if you are struggling to eat enough, a protein supplement is a genuinely reasonable tool, and it works far better when paired with some form of strength activity. Muscle responds to the combination of protein and use, not to protein alone. 

Worth It In Specific Situations

Calcium. Important for bone, but food first, through dairy, tinned fish with bones, fortified products, and leafy greens. Supplements make sense when dietary intake is genuinely low or osteoporosis is present. Taking large amounts beyond what you need is not advisable, so this is one to discuss rather than self-prescribe. 

Folate. Matters for red blood cell formation, and often assessed alongside B12 when anemia or fatigue is being investigated. 

Omega-3. The evidence is mixed. It has not proven to be a general preventive for healthy people, though there may be value for those with existing cardiovascular disease. Eating oily fish a couple of times a week remains a better bet than a capsule for most people.

A basic multivitamin. Reasonable for someone eating very little or with a narrow, monotonous diet. It is not, however, the nutritional insurance policy it is often sold as, and for well-nourished adults the large reviews have not found it prevents heart disease or cancer. 

Probably a Waste of Your Money 

Now for the other side of the ledger. These are not fringe products, they are among the best-selling supplements on the shelf, and they have been properly tested. 

Ginkgo biloba. The classic memory supplement. A large trial following more than 3,000 older adults for several years found it did not reduce the incidence of dementia or Alzheimer's disease, and did not slow cognitive decline. The evidence simply does not support it. 

"Brain health" and memory blends. These typically combine several herbs and vitamins at vague doses. Expert reviews of the field have concluded there is no convincing evidence that such supplements protect thinking or memory in later life, and the plain advice has been to save the money and spend it on good food instead. 

Vitamin E. Once hugely popular as an antioxidant. It is now specifically recommended against for preventing heart disease or cancer, and it has not been shown to help with cognition or Alzheimer's.

Beta-carotene. This one goes beyond useless. It is recommended against for preventing heart disease or cancer, and in large trials it increased lung cancer risk in smokers. If you want the benefits of carotenoids, eat the carrots and the sweet potatoes, where they come safely packaged with everything else. 

High-dose antioxidant formulas generally. The theory was appealing, but big doses of isolated antioxidants have repeatedly failed to prevent chronic disease, and several have shown signs of harm. Nutrients seem to behave differently when extracted from food and concentrated into a pill. 

Megadose vitamin C. Beyond a modest amount, your body simply excretes the surplus. Very large doses can also upset the stomach and, in some people, contribute to kidney stones. 

 Glucosamine and chondroitin. Enormously popular for aching joints, but the research is mixed at best, with any benefit tending to be small and inconsistent. Some people feel they help, which is not nothing, but the evidence does not support them as a reliable treatment. 

Routine daily probiotics. Useful in certain specific medical situations, but the everyday preventive use that marketing encourages is not well supported, and the evidence in older adults specifically is thin. 

The Part Most People Overlook: Safety

There is a widespread assumption that supplements, being natural and sold without prescription, cannot really hurt. That is not quite right, and it matters more after 60 because most of us are taking other medications. 

 Interactions are real. Supplements can interfere with prescription drugs, including blood thinners, thyroid medication, blood pressure treatments, and antibiotics. This is the single most important reason to tell your doctor and pharmacist about everything you take, including the things you bought yourself. 

More is not better. Vitamins A, D, E, and K are stored in the body rather than flushed out, so they can accumulate to harmful levels. Doses far above the recommended amount deserve caution, not enthusiasm. 

The industry is lightly regulated. Supplements do not have to prove they work before going on sale, and quality varies considerably. Looking for an independent quality verification mark on the label is a sensible habit. 

Do not stop anything your doctor prescribed. If a supplement was recommended for a diagnosed condition, that is a different matter entirely from something you picked up hopefully in a shop.

How to decide what you personally need

Ask for a blood test rather than guessing. Vitamin D , B12, folate, and iron can all be measured. Knowing your actual numbers turns guesswork into a decision.

Bring everything to your next appointment. Put every bottle in a bag, or photograph the labels, and go through them with your doctor or pharmacist. People are often taking duplicates without realizing. 

Ask one question of each bottle: what shortage is this correcting, and do I have it? If there is no clear answer, it probably does not belong in your morning routine. 

Choose food first where you can. Nutrients in food arrive alongside fiber, other vitamins, and compounds that seem to matter, which is a package no capsule reproduces.

 Be skeptical of dramatic promises. Anything claiming to reverse aging, restore memory, or transform your energy is selling hope rather than evidence.

What Beats Every Supplement on the Shelf 

It is worth saying plainly, because the supplement aisle can distract from it. Nothing in a bottle comes close to the fundamentals: eating a varied diet with enough protein and plenty of plants, keeping your muscles working through some form of strength activity, sleeping properly, staying connected to other people, and keeping up with your medical care. 

Those are unglamorous and free, and they outperform anything you can buy. A supplement can usefully fill a specific gap. It cannot substitute for the foundations, and no amount of money spent on capsules will make up for their absence.


This is only for your information, kindly take the advice of your doctor for food, medicines, exercises and so on.   


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posted by G S Iyer at 9:37 AM 0 comments