A dog’s body can generate vitamin C. So, too, can a cat’s. Unfortunately, human ancestors lost that trick during their evolutionary climb.
Roughly 40 million years ago, the forebearers of apes and humans could access plentiful fruit rich in vitamin C. So over time, the gene responsible for making it withered on the evolutionary tree. We lost the ability.
Which for marketers is a good thing, otherwise we might not have gotten one of the most famous ad slogans ever: A day without orange juice is like a day without sunshine.
Now, a Japanese study shows just how important a glass of OJ, or a piece of any fruit or vegetable producing the nutrient, is to our good health. Researchers demonstrated that lower vitamin C levels were associated with reduced brain tissue and altered structural network patterns in the organ.
That provides strength to what scientists long suspected. The vitamin might help prevent cognitive decline.
The study included about 2,000 volunteers who underwent brain MRIs. Scientists also measured their vitamin C levels through a blood test.
Previous research had already shown that vitamin C levels in the fluid surrounding the brain are twice those in blood. That, too, suggests its importance in brain health.
Scientists don’t suggest that vitamin C acts alone in maintaining the brain. It is instead viewed as perhaps one of several important factors.
It’s essential to remember that these findings can only indicate an association and do not establish cause and effect.
Until natural selection jump-starts our ability to produce vitamin C once more, it can’t hurt to grab an orange now and then.

A dog’s body can generate vitamin C. So, too, can a cat’s. Unfortunately, human ancestors lost that trick during their evolutionary climb. Roughly 40 million years ago, the forebearers of apes and humans could access plentiful fruit rich in vitamin C. So over time, the gene responsible for making it withered on the evolutionary tree. We lost the ability. Which for marketers is a good thing, otherwise we might not have gotten one of the most famous ad slogans ever: A day without orange juice is like a day without sunshine. Now, a Japanese study shows just how important a glass of OJ, or a piece of any fruit or vegetable producing the nutrient, is to our good health. Researchers demonstrated that lower vitamin C levels were associated with reduced brain tissue and altered structural network patterns in the organ. That provides strength to what scientists long suspected. The vitamin might help prevent cognitive decline. The study included about 2,000 volunteers who underwent brain MRIs. Scientists also measured their vitamin C levels through a blood test. Previous research had already shown that vitamin C levels in the fluid surrounding the brain are twice those in blood. That, too, suggests its importance in brain health. Scientists don’t suggest that vitamin C acts alone in maintaining the brain. It is instead viewed as perhaps one of several important factors. It’s essential to remember that these findings can only indicate an association and do not establish cause and effect. Until natural selection jump-starts our ability to produce vitamin C once more, it can’t hurt to grab an orange now and then.

Study shows vitamin C’s importance to brain health

Is there anything better than sitting? By looking at the rates of Americans who engage in the sedentary activity — roughly half of the population, by the way — you’d guess no. And, though your body prefers moving to sitting by miles, we’re going to tell you what you really want to know: how to sit better.
A study led by the University of Glasgow found that breaking up your sitting by short movement breaks was associated with an 18% lower risk of death from diabetes- and obesity-related cancers per each added hour of relentless reclining.
Researchers defined “interrupted sitting” as a sit either lasting less than half an hour, or one broken up by some kind of activity.
Though previous research has largely targeted decreasing how much total time we spend on our rears, this study posited that simply decreasing the duration of each “sit” could matter just as much as sitting less.
When they modeled these results, scientists noted that swapping out even one hour of uninterrupted sitting with the intermittent version was linked to a 12% lower risk of death related to cancer. The analysis drew from the data of more than 90,000 participants across 12 years. To get an idea of how often people were moving, researchers relied upon wrist devices that tracked activity as opposed to self-reports of movement.
Though more research is needed to understand what’s prompting these improvements, scientists think extended sedentary periods could be impacting mechanisms like blood sugar regulation, scientists say. Getting up, even for a little, keeps your body running smoothly.
Taking the time to leave your chair to rinse out a coffee cup has never felt more important.

Is there anything better than sitting? By looking at the rates of Americans who engage in the sedentary activity — roughly half of the population, by the way — you’d guess no. And, though your body prefers moving to sitting by miles, we’re going to tell you what you really want to know: how to sit better. A study led by the University of Glasgow found that breaking up your sitting by short movement breaks was associated with an 18% lower risk of death from diabetes- and obesity-related cancers per each added hour of relentless reclining. Researchers defined “interrupted sitting” as a sit either lasting less than half an hour, or one broken up by some kind of activity. Though previous research has largely targeted decreasing how much total time we spend on our rears, this study posited that simply decreasing the duration of each “sit” could matter just as much as sitting less. When they modeled these results, scientists noted that swapping out even one hour of uninterrupted sitting with the intermittent version was linked to a 12% lower risk of death related to cancer. The analysis drew from the data of more than 90,000 participants across 12 years. To get an idea of how often people were moving, researchers relied upon wrist devices that tracked activity as opposed to self-reports of movement. Though more research is needed to understand what’s prompting these improvements, scientists think extended sedentary periods could be impacting mechanisms like blood sugar regulation, scientists say. Getting up, even for a little, keeps your body running smoothly. Taking the time to leave your chair to rinse out a coffee cup has never felt more important.

How to sit better (and avoid cancer while doing so)

Fish oil supplements are a huge industry. Americans spend more than $1 billion a year on them, hoping to support brain health by taking in the omega-3 fatty acids they contain.
A new study may provide a dose of reality, however. A two-year clinical trial conducted by University of Southern California researchers found that while fish oil supplements do deliver omega-3s to the brain, there is no meaningful benefit for memory, cognition or Alzheimer’s-related changes.
On its face, taking fish oil supplements is not illogical. Omega-3s, healthy fats found in some fish, help build the connections between brain cells key to our ability to think and remember.
More than 350 people between the ages of 55 and 80 who rarely ate fish were enrolled in the study. All were at elevated risk for Alzheimer’s disease. They were placed in two groups. One group was given a daily, high-dose fish oil supplement; the other group got a placebo.
Each supplement contained 2,000 milligrams of docosahexaenoic [duh-kow-suh-hek-suh-know-ick] acid, or DHA, an omega-3 important in brain function. For the brain, DHA is like premium oil is to an engine.
By measuring DHA levels in participants’ cerebrospinal fluid, they could see it did indeed reach the brain.
Even so, that did not equate to measurable cognitive benefits. Participants went through memory tests at the start of the study and two years later. Those who took DHA supplements performed no better than the placebo group.
For now, the researchers say those who hope to safeguard brain health should focus on eating nutritious food and staying fit. And eating salmon, mackerel, sardines and anchovies surely can’t hurt.

Fish oil supplements are a huge industry. Americans spend more than $1 billion a year on them, hoping to support brain health by taking in the omega-3 fatty acids they contain. A new study may provide a dose of reality, however. A two-year clinical trial conducted by University of Southern California researchers found that while fish oil supplements do deliver omega-3s to the brain, there is no meaningful benefit for memory, cognition or Alzheimer’s-related changes. On its face, taking fish oil supplements is not illogical. Omega-3s, healthy fats found in some fish, help build the connections between brain cells key to our ability to think and remember. More than 350 people between the ages of 55 and 80 who rarely ate fish were enrolled in the study. All were at elevated risk for Alzheimer’s disease. They were placed in two groups. One group was given a daily, high-dose fish oil supplement; the other group got a placebo. Each supplement contained 2,000 milligrams of docosahexaenoic [duh-kow-suh-hek-suh-know-ick] acid, or DHA, an omega-3 important in brain function. For the brain, DHA is like premium oil is to an engine. By measuring DHA levels in participants’ cerebrospinal fluid, they could see it did indeed reach the brain. Even so, that did not equate to measurable cognitive benefits. Participants went through memory tests at the start of the study and two years later. Those who took DHA supplements performed no better than the placebo group. For now, the researchers say those who hope to safeguard brain health should focus on eating nutritious food and staying fit. And eating salmon, mackerel, sardines and anchovies surely can’t hurt.

Fish oil supplements no help against memory issues

Consider this episode your walking papers. No, we’re not firing you — but we are giving you a pretty good reason to start walking more than you have before. In...

Walk, don’t run, toward healthier knees

We all feel good after an act of kindness. Whether it’s helping an elderly neighbor carry in the groceries or volunteering at the local hospital every week, acts of selflessness...

Kindness boosts health, well-being

We all want to put our best foot forward, especially around strangers. But many of us apparently harbor a dark secret about our diets. These folks eat donuts and fried...

Do we eat better to impress others?

Humans are going to be a lot sleepier in the future if a new study about the impact of global warming is on the mark. In fact, by the end...

Hotter future could lead to loss of sleep, study says

If you’re a happy lady and you know it, clap your hands — because there may be plenty of years ahead for you. A new study from the Harvard T.H....

Optimistic perspective linked to longer lifespan in women after 90

If you don’t have Crohn’s disease, take a moment to thank your large family — or your childhood dog. A link between the inflammatory bowel disease and living arrangements in...

Dogs, larger families can confer Crohn’s disease protection

The harmful effects of Type 2 diabetes are well known: heart disease, nerve damage, kidney disease and other problems. Now, add brain aging and cognitive decline to that list. For...

Type 2 diabetes can accelerate brain aging

To our listening audience: It’s time to get your groove on. Dancing has surged in popularity over the last few years, with television shows focused on competitive dance, fitness studios...

Be a dancing machine, for good health

Cats can be aloof and independent, often acting as if they are indifferent to our affection. Slobbering golden retrievers they are not. We love them still. They can cuddle and...

Cat ownership in childhood associated with psychosis in adult men

Breathing is supposed to be natural. We start as we leave the womb and we spend the rest of our years inhaling and exhaling, until our lives end. But what...

Poor breathing technique may lead to sports injuries

Health in a Heartbeat is a daily radio series that features two-minute segments providing consumer-health information and the latest news on medical research, patient-care breakthroughs and health-care industry trends.  The series launched in January 2000 and is available at no charge to public radio stations nationwide. It is a unique project offered by University of Florida Health in association with the UF radio stations 89.1 WUFT-FM and 90.1 WJUF-FM. It currently airs in more than 53 cities in 18 states and Washington, D.C., in addition to being available on NPR.org and the NPR One mobile app.  Our scripts go through a vigorous research and approval process. Each script is reviewed by University of Florida physicians, UF Health experts and qualified medical editors. This ensures that you are receiving accurate and up-to-date health information.

Health & Fitness

Education

Health in a Heartbeat is a daily radio series that features two-minute segments providing consumer-health information and the latest news on medical research, patient-care breakthroughs and health-care industry trends. The series launched in January 2000 and is available at no charge to public radio stations nationwide. It is a unique project offered by University of Florida Health in association with the UF radio stations 89.1 WUFT-FM and 90.1 WJUF-FM. It currently airs in more than 53 cities in 18 states and Washington, D.C., in addition to being available on NPR.org and the NPR One mobile app. Our scripts go through a vigorous research and approval process. Each script is reviewed by University of Florida physicians, UF Health experts and qualified medical editors. This ensures that you are receiving accurate and up-to-date health information.

Share Health in a Heartbeat

Sign up to save your podcasts

Health in a Heartbeat

FAQs about Health in a Heartbeat:

How many episodes does Health in a Heartbeat have?

Health in a Heartbeat episodes:

FAQs about Health in a Heartbeat:

How many episodes does Health in a Heartbeat have?

More shows like Health in a Heartbeat

Up First from NPR