Free Radicals May Not Be Cause of Aging
An anonymous reader writes "Researchers at McGill University in Montreal have uncovered strong new evidence that that wildly-accepted mitochondrial free radical theory of aging (MFRTA) is wrong. MFRTA suggests that free radicals cause oxidative damage, which in turn leads to the aging process. This new evidence shows that high levels of Reactive Oxidative species are rather a biological signal used to combat aging then the process itself. This goes against claims of major health benefits from consuming foods and particularly supplements that contain antioxidants."
Jailing the radicals was good?
I've fallen off your lawn, and I can't get up.
Well...
"This goes against claims of major health benefits from consuming foods and particularly supplements that contain antioxidants."/quote?
Good thing that worms in a lab are so biologically analogous to humans. Time to stop eating tomatoes, broccoli, and spinach
Jailing the radicals was *bad*. Radicals want to be free! TUBULAR!
I mean, how can anything with the word free right there as part of it's name be bad for you?
Like, free porn, or free t-shirts and free guns. So obvious.
Well it's not surprising at all to hear this about free radicals. We all know that libre radicals have a better chance at it.
These molecules are harmless enough in short time scales so there's no pressure to get rid of them. However, they accumulate and eventually gum up the works so to speak.
When can we start seeing attempts to cleave these AGE molecules in-vivo in humans? I want to live longer. Just like some people want to see other planets, I want to see more time.
If free radicals were responsible for (a large part) of aging then blueberry farmers would routinely live to be more than 100. Blueberries supposedly have the highest amount of anti-oxidants (by weight? volume? serving size?) of any food.
Too bad, I love blueberries.
Next they're going to tell us that asbestos actually cures lung cancer and we should sprinkle DDT on our cereal every morning to avoid shingles..
For justice, we must go to Don Corleone
I don't think I could give up my tomatoes even if they were...
93rd rule of Slashdot: No matter how obvious my sarcasm is, my comment will be taken seriously by someone.
The full title ought to be:
"Free Radicals May Not Be The Cause of Aging This Week!"
I always got the sense that the antioxidant craze was healthwashing run amok. Every time I've looked into it there seem to be as many detriments as benefits. From what I've read, oxidation plays a role in so many different processes isn't it unclear whether its good or bad as a whole?
meep
What would happen if they actually "cured aging". Would our system work if all the sudden people lived to 200 or 500 or... I would almost think, like that STNG episode where they all had to die at 60, maybe you would have to cap it a 100 or 150. If I could live to 100 as healthy as I am now (at 43) I would think that would be a pretty good life.
If you could reason with religious people, there would be no religious people
More proof my all beer diet is going to make me live forever.
More generally, scientists should not confuse cause and effect. Or even more generally: correlation for causation. That's just bad science.
And yet, it seems to be rather prevalent. Especially in the questionable science of nutrition, where any slightly new idea can lead to a fortune in book sales, diet plans, drug development, etc.
...Noam Chomsky *isn't* making me get older?
Shouldn't it be "widely" ?
One of the main differences is how much polyunsaturated fatty acid is consumed. PUFAs are unstable, oxidize spontaneously when introduced to a human body, and generally wreck havoc in a warm-blooded mammalian systems (fish need these thin oils because they live in cold water). No amount of anti-oxidants is enough to counter the damage done by rancid oils. All seed oils are deodorized to hide rancidity.
My dad's wife is not aging gracefully. Her skin is wrinkled like someone 15 years older than she is. One of her regular dishes is fish fried in "vegetable" oil (corn/soy/rapeseed).
Safe oils are saturated, like butter, coconut oil, and lamb fat.
Learn the rules so you know how to break them properly.
www.teslabox.com
If ANY diet made you live significantly longer we'd have noticed by now.
Same goes for exercise regimes, eg. If running five miles a day made you live longer we'd have noticed.
We can point to plenty of things that make your life shorter, eg. smoking, eating nothing but junk food, but I'm fairly sure that if you're living a reasonable lifestyle then genetics completely dominates. After that it's probably as much down to happiness as anything else.
No sig today...
"This new evidence shows that high levels of Reactive Oxidative species are rather a biological signal used to combat aging then the process itself"
So does eating healthy with a lot of antioxidants actually make you age faster?
Free radicals don't cause aging, staring at Perl code does. Drives you to drink and makes you lose hair, too.
Fuck systemd. Fuck Redhat. Fuck Soylent, too. Wait, scratch the last one.
As shown by this research: http://www.nature.com/news/2010/101128/full/news.2010.635.html
Rather straightforward, isn't it? Why *does* a cell die, anyway? As long as it can grow and replicate, it shouldn't. Except for the telomere TTL-signal. Once we intervene in that, I think aging could be reduced or slowed drastically. I doubt there is much risk of cancer: cancer is when cells don't respond to normal apoptosis signals and keep growing. While removing the TTL-signal could be risky, I'm confident that cells with only the Time To Live removed could still respond normally to other signals. And while cancer *may* be lethal, aging is *always* lethal.
Therefore, by the (faulty) logic you're using, you're just a cow with a keyboard - osu-neko (2604)
Hey! Scientists! Stop ruining nonsensical old X-Files episodes!
If vegetables are good for your health it does not mean meat is bad.
I eat both neat and vegetables, when people try to guess my age they normally undershoot by ten to fifteen years.
"Researchers at McGill University in Montreal have uncovered strong new evidence that that wildly-accepted mitochondrial free radical theory of aging (MFRTA) is wrong.
Next you'll be telling us midiclorians aren't responsible for our force powers either!
"There is more worth loving than we have strength to love." - Brian Jay Stanley
What makes a theory "wildly accepted"? Does it mean there are a bunch of scientists who gather spontaneously at impromptu bonfires and ululate their heathen belief in a carnal fashion?
coughs, colds, fever, and yes, even Cancer. Scientists (mostly on payrolls) claimed all of the above. Part of it was a correlation == causation. Another part was executives telling them what to say.
Now, we have scientists that had found a correlation between aging and radicals. So, they used stats rather than hard proof to claim it. Why? Because SO MANY are in a hurry to be at the top of the heap.
Are radicals associated with aging? It would appear to be. Are radicals the cause of aging? Well, that needs to be researched rather than being declared as such.
I prefer the "u" in honour as it seems to be missing these days.
TFA doesn't say how these worms were genetically modified.
Set your phasers on "funky"!
Haven't you noticed how people not so many years agou used to look quite old and frail already in their sixties, but now we are no longer surprised to find that people in their seventies are still physically active and mentally alert?
Yes. Then I realize that old people haven't changed... When I was 10, people in their 40s looked aged, people in their 60s looked very old and frail, and people in their 80s looked like something from a horror movie.
Now that I'm in my 30s, I find people in their 40s don't look so old. And people in their 60s don't look all that much different with the exception of some white/grey hair and a few more blemishes on their skin.
Apparently not accepted for humans in captivity...good news for those of you still living in mom's basement.
Great warrior...hrmph! Wars not make one great.
'If you ask most people on the street what causes aging, many would say free radicals, but it's a complex story.'
—Dr. Siegfried Hekimi, McGill University
I'm pretty sure if you asked most people on the street what causes aging, a handful would say free radicals, while most would say time or God. Then if you followed up by asking them, "Don't you think it could be free radicals?" their answer would be "WTF are free radicals?"
"I don't care about the Constitution!" --Bill O'Reilly, November 17, 2009
I have thought about this problem for a long time now. Does the oxidative damage occur first causing aging or does aging lead a reduction in the cell's ability to combat oxidative stress?
A lab at the University of Michigan has done some great work on this, but the still have not quite answered the question.
http://www.mcdb.lsa.umich.edu/labs/jakob/scerevisiae.html
My opinion for a long time follows the article. I don't think that antioxidants from foods prevent DNA damage. I think that fruits and vegetables actually have compounds that are potentially carcinogens, and your body's oxidative stress response is upregulated by these. Yeast cells that are challenged with a low does of an oxidant are better able to handle a higher dose of oxidant than cells that were not. It's akin to whatever doesn't kill you makes you stronger.
Bruce Ames who invented the ames test to determine the mutagenic potential of compounds has published articles about how natural carcinogens are just as common as synthetic ones. Plants produce many of their own pesticides which have been shown to be carcinogens. I would highly recommend reading about this for any of you are into organic food choices.
So, fruits and vegetables help us live longer, but possibly by exactly the opposite reason that everyone believes.
One thing that should be pointed out is that this article is in the January 2010 issue, and was initially published online in September 2009, so this isn't breaking news, though it looks like research may have continued in the same lab following this paper- there's no reference t paraquat in the paper, for instance. Another, which is touched on in the news article is that the scientists involved do not dispute that reactive oxygen species can have deleterious effects on living organisms- just that aging is not a process of mitochondria being injured by ROS. Their conclusion spells it out:
"FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."
80+ isn't very old for humans (in fact it's the average in many countries these days...)
A miracle diet for humans would have to do a lot better than that. eg. Calorie restriction in mice makes them live twice as long.
Even a 25% increase in human lifespan would mean people could make it to 150 but that's simply not happening. Not with any known diet or lifestyle.
Given the vast range of lifestyles/diets all over the world you'd think we'd be able to measure something if diets/lifestyles really made much of a difference.
There's no shortage of people looking for a miracle diet/lifestyle so I'm sticking with Occam's razor for now.
No sig today...
You don't need to remove the TTL, just reset it every fifty years or so.
A drug that restores the telomeres in each cell could be applied when needed, and then the telomeres would be shortened again at each cell division in the normal way.
There exists such a chemical, it's an enzyme it's called telomerase and it is actually active in a significant proportion of cells in the body. Either way the situation is far more nucanced than just the telomeres.
How about widely accepted?
Glad to know that primitive peoples who don't use those kinds of oils are so healthy and age so well...
FYI, coconut oil is not totally saturated (IV 14 or so). Even in its ultrahardened (by hydrogenation) form, it can still undergo oxidative breakdown and form peroxides in one of the early steps. It admittedly does so at a slower rate than highly unsaturated oils.
How do I know? I worked in a quality control lab that measured the iodine value (a measure of saturation) and the peroxide value (a measure of oxidative deterioration) in coconut oils among many others.
Both butterfat (IV 30 or so) and lamb fat (IV also around 30) are not completely saturated. They also undergo oxidative decay of this sort.
Essentially no natural source oil is completely saturated. The only ones I've seen that were have been chemically prepared synthetics (Captex 300 comes to mind)
FYI number 2: The coconut oil is deodorized as well. It also is sometimes hardened with hydrogenation depending on the application.
My facility was set up for kosher processing and we didn't do animal based oils. But many processed animal fats are also deodorized with high temperature steam just like plant oils.
There are a whole range of other questionable things in your post beyond the lack of knowledge of oil chemistry.
There are many well known reasons for accelerated aging of skin in some people. Over exposure to sun. Smoking. Genetics, etc.
And wrinkly. Why are friends younger than me balding and getting wrinkles?
For the former? Maybe they're genetically predisposed to it in a way that you aren't?
For the latter? Maybe they smoke and you don't? Maybe you intensively moisturise and they don't? Maybe you ate loads of crap (when they didn't) and ballooned massively in weight as you got older, smoothing out the wrinkles?
Who knows. It's pretty stupid to automatically assume it's because they're vegetarians.
As opposed to the cholesterol that your own body makes, for example?
Where are you coming up with this unnatural cholesterol in the diet?
Just who is expensively synthesizing cholesterol and adding it to foods? (As opposed to cheaply getting it from its many many natural sources.)
The big problem in the diet of developed countries with oils is not the source of them.
The widely agreed problem with oils in the developed world diet is: "Too much."
They all have similar chemistry and mostly differ in the specific balance of different fatty acids that make them up and in some of the trace chemicals that come along with them.
You may quibble about the type of fats and oils, but you'll get pretty broad agreement that we eat too much fat and oil. And rotund sort that I am, I'm a poster child for it.
The problem is, they tend to taste so good, and humans are poor at abstaining or limiting things which taste good.
This new evidence shows that high levels of Reactive Oxidative species are rather a biological signal used to combat aging then the process itself.
Then the process itself what? Doesn't seem like the author of this statement made it through the second half of third grade where the difference between "then" and "than" is taught...
If ANY diet made you live significantly longer we'd have noticed by now.
Same goes for exercise regimes, eg. If running five miles a day made you live longer we'd have noticed.
We can point to plenty of things that make your life shorter, eg. smoking, eating nothing but junk food, but I'm fairly sure that if you're living a reasonable lifestyle then genetics completely dominates. After that it's probably as much down to happiness as anything else.
Actually, diet is very important to your health and eating correctly DOES make you live longer than someone eating fries everyday.
Secondly, exercise DOES make you live longer simply by reducing obesity, making your body function properly, etc....
What is interesting with the article is that exercise does significantly INCREASE the levels of free radicals in your blood stream. It is a well known fact that these free radicals are "good for you" - many experts called them "special free radicals" and is not well understood why they were counter to the "known science" about free radicals and their negative effects. These free radicals formed during exercise are responsible for increasing capabilities of your muscles, including heart muscle and arteries. Taking antioxidants immediately after aerobic exercise almost completely negates the positives associated with the exercise.
These worm experiments may finally start to unlock the importance of free radicals in your system.
ya know like forever and then some
Organic food is almost all grown the exact same was as regular food: on large, industrial farms, in large volumes, for a profit. The only difference is that the expense of Organic food comes from the limited supply (due to demand as well as a higher rate of spoilage), while the expense of normal food comes from making it better, cheaper, and safer.
Are you trolling, or just ignorant? Most people don't know what organic food is, but if you're going to make an argument about it, why not educate yourself on the subject first rather than just spout your own prejudices for everyone on the internet to read?
Food quality has been on a steady decline. Poisons and hormone-mimickers in food are steadily going up while nutrients like minerals and vitamins are going down. Read the studies about it and wonder why this is so, all while buying cheaper food in larger quantities. The long list doesn't end there however, the earth itself is being drained of nutrients due to unhealthy mono-culture and non-stop farming each and every year. For many farmers, this is more important, so there is a big shift today to organic farming, just because of the higher sustainable development factor. If we destroy the earth, famine is not too far away. If we destroy nature or cut outself out from it too much, we may have to turn to genetic engineering to be able to sustain healthy bodies, always fighting new unknown diseases, not a very pleasant prospect except for the medical industry.
Organic farming can be many different ways, with the more extreme end being biodynamic farming. It is true that you can have large farms producing roughly the same yield as "modern farms", at least if you compare nutrients. Many people have the opinion that you can eat less of organic foods, and still feel satiated. So less yield does not necessarily mean less food.
This clockwork-universe mentality that everything to food and life is about proteins, minerals, vitamins, and this obsession of getting rid of dirt and bugs, is well, an hypothesis without basis in nature. Many people believe that there is more to food than what we can measure in its quantities. Life is certainly about more than its parts. If you lack this understanding, you've been living in the city for too long. It's clouding your judgement, so time to take a break off media and city, find some new fresh perspectives in nature.
Why Organic? (Quite interesting introduction)
http://journeytoforever.org/garden_organic.html
Top 10 Reasons for Organic Farming (Showing that the soil and environment is given more importance)
http://www.organic.org/articles/showarticle/article-206
Btw, IANAF (I Am Not A Farmer), however, I know there is alot to organic farming and sustainable development, than our prejudices. Currently living outside major cities, and it does bring a different perspective to life than endless visits to cafes and caffe lattes.
Before you condemn something, at least give it a fair shot first, hmm?
http://www.debunkingskeptics.com/
"This new evidence shows that high levels of Reactive Oxidative species are rather a biological signal used to combat aging thAn the process itself." Come on, now. news for nerds shouldn't make such basic grammar mistakes. Learn to edit, timothy
You were critically hit for no damage. The bruise will look nice, and maybe the scars will make good party talk.
Apart from the fact everyone was pretty sure that both this and the ridiculous "DNA Damage" theories were wrong, this has been splatted out of existence in the last week or so - we now know thanks to the mice experiments that Telomere shearing is the primary ageing mechanism, period. There are other mechanisms, and studying the evolutionary scenarios for Senessence (ageing) is absolutely fascinating - but this hippy crap about free rads was never really a contender.
The studies on paleo diet have been very mixed as yet.
There are people who still eat that sort of diet with little or no processed fats in bush areas of the world still. Though you get claims of long life, it's anecdotal and more often bragging than reality.
The myth of the healthy savage has been around for quite some while, and it crops up repeatedly with relatively little to back it up.
On the other hand, there is good evidence that modern diet has some real downsides especially when combined with being sedentary. We just don't know all the details and combinations yet.
Mom Nature rarely uses single biochemical pathways when several interlinked ones will do. It makes figuring out the straight of it very difficult.
The mice that you mention were already telomerase deficient. Putting it back helped some.
The mice had a switchable expression of telomerase. When it was off, they had poor development and some of the symptoms of aging at the cellular level. When it was turned back on, they got better.
This is interesting, but not some magic bullet. It was a bit like showing that mice who can't produce insulin are diabetic, and then when insulin is switched back on, they get better. It doesn't tell you how to cure diabetes.
Humans age differently than mice. Besides, the mice in the study will still get old and die.
There are a lot of other factors in what is a very tangled complex process of aging that varies from one type of creature to another.
Eat less calories by eating more fibers/nutrients with more vegetables and fruits: http://www.drfuhrman.com/
He suggests: Health = Nutrients / Calories
So more oxidants will increase the biological signal used to combat aging ?
http://www.youtube.com/watch?v=46_GInjBeQU
Dr. Fuhrman Cures Diabetes - But Drug Companies Object
When someone tells me that the big car companies are supressing the 200 mpg carburetor that will work on a 2 ton vehicle, I call bullshit just on the basis of physics.
When someone tells me that this carburetor is already easily available to play with like a simple change in diet, and yet no one is demonstrably using it successfully. I call bullshit again.
Can diet improve insulin response in type 2 diabetes? Of course! That's why physicians always modify the diet as part of the therapy for it.
So can moderate exercise. Walking daily is a good thing (tm).
Does a magic diet cure it by itself. In a rare and atypical case, maybe. Not likely in most people.
I always wondered about those antioxidants, and wondered, what they are doing roaming around after dark, and worse, if they are roaming after dark, what about uncleoxidants? Surely if the antioxidants are out and roaming, the uncleoxidants are likely getting liquored at the poker game, and after the fight breaks out, they start singing and going on a pub crawl. The antioxidants are the least of your worries. Worse that spring break! Way way worse!
I might not be a scientist, but i'm pretty sure time causes aging.
Be seeing you...
Yep, the same thing that kills you around the age of 100 is probably one of the reasons why you're not all that likely to die of cancer at the age of 25.
CSPI was a big part of the push for removing saturates in the 80s. Until they decided trans fats were worse than saturates, and then they reversed course. So, now we're going back to using more tropical oils.