Watermelon vs Grapes – Which is Healthier?
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Our Verdict
When comparing watermelon to grapes, we picked the watermelon.
Why?
It was close! And certainly both are very healthy.
Both fruits are (like most fruits) good sources of water, fiber, vitamins, and minerals. Any sugar content (of which grapes are slightly higher) is offset by their fiber content and polyphenols.
See: Which Sugars Are Healthier, And Which Are Just The Same?
While both are good sources of vitamins A and C, watermelon has about 10x as much vitamin A, and about 6x as much vitamin C (give or take individual plants, how they were grown, etc, but the overall balance is clearly in watermelon’s favor).
When it comes to antioxidants, both fruits are good, but again watermelon is the more potent source. Grapes famously contain resveratrol, and they also contain quercetin, albeit you’d have to eat quite a lot of grapes to get a large portion.
Now, having to eat a lot of grapes might not sound like a terrible fate (who else finds that the grapes are gone by the time the groceries are put away?), but we are comparing the fruits here, and on a list of “100 best foods for quercetin”, for example, grapes took 99th place.
Watermelon’s main antioxidant meanwhile is lycopene, and watermelon is one of the best sources of lycopene in existence (better even than tomatoes).
We’ll have to do a main feature about lycopene sometime soon, so watch this space
Take care!
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Coach’s Plan – by Mike Kavanagh
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A sports coach’s job is to prepare a plan, give it to the player(s), and hold them accountable to it. Change the strategy if needs be, call the shots. The job of the player(s) is then to follow those instructions.
If you have trouble keeping yourself accountable, Kavanagh argues that it can be good to separate how you approach things.
Not just “coach yourself”, but put yourself entirely in the coach’s shoes, as though you were a separate person, then switch back, and follow those instructions, trusting in your coach’s guidance.
The book also provides illustrative examples and guides the reader through some potential pitfalls—for example, what happens when morning you doesn’t want to do the things that evening you decided would be best?
The absolute backbone of this method is that it takes away the paralysing self-doubt that can occur when we second-guess ourselves mid-task.
In short, this book will fire up your enthusiasm and give you a reliable fall-back for when your motivation’s flagging.
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GABA Against Stress/Anxiety
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A Neurotransmitter Less Talked-About
GABA is taken by many people as a supplement, mostly as a mood modifier, though its health claims go beyond the recreational—and also, we’re of the opinion that mental health is also just health, and if it works, it works. We’ll explore some of the claims and science behind them today…
What is GABA?
GABA stands for gamma-aminobutyric acid, and it’s a neurotransmitter. It’s a lot less talked-about than for example dopamine or serotonin, but it’s very important nonetheless.
We make it ourselves inside our body, and we can also get it from our food, or supplement it, and some drugs will also have an effect on its presence and/or activity in our body.
What foods is it found in?
- Animals, obviously (just like in human brains*)
- Fermented foods (many kinds)
- Yeast
- Tea
- Tomatoes
- Mulberries
For more details, see:
γ-Aminobutyric acid found in fermented foods and beverages: current trends
*However, we do not recommend eating human brains, due to the risk of CJD and prion diseases in general.
What claims are made about it and are they true?
For brevity, we’ll give a little spoiler up-front: all the popular claims for it appear to be valid, though there’s definitely room for a lot more human trials (we skipped over a lot of rodent studies today!).
So we’ll just drop some of its main benefits, and human studies to back those.
Reduction of stress and anxiety
GABA decreases task-related stress and anxiety within 30 minutes of being taken, both in subjective measures (i.e., self-reports) and in objective clinical physiological measures:
Cognitive enhancement
It’s not a does-everything nootropic like some, but it does have clear benefits to episodic memory:
❝GABA intake might help to distribute limited attentional resources more efficiently, and can specifically improve the identification and ordering of visual events that occur in close temporal succession❞
One of the things that makes this one important is that it also deals with the often-asked question of “does GABA pass the blood-brain barrier”:
❝The present findings do give further credence to the idea that oral ingestion does allow GABA to reach the brain and exert direct effects on cognition, which in the present case were specific to temporal attention.❞
Read more:
Supplementation of gamma-aminobutyric acid (GABA) affects temporal, but not spatial visual attention
Potential for more
We take care to give good quality sources, so the following study comes with a big caveat that it has since been retracted. Why was it retracted, you wonder?
It’s about the sample; they cite “30 healthy adults”, but neglected tp mention that this figure was initially 46. What happened to the other 16 participants is unclear, but given that this was challenged and the challenge not answered, it was sufficient for the journal (Nature) to pull the study, in case of deliberate sample bias.
However! Running the numbers in their results section, a probability of 0.03 is very compelling unless the disappearance of 16 subjects was outright fraudulent (which we regrettably cannot know either way).
Here’s the study (so take it with a pinch of salt, considering the above), and taken at face value, it shows how GABA supplementation improves accurate reactions to fast-moving visual and auditory stimuli:
RETRACTED ARTICLE: γ-Aminobutyric acid (GABA) administration improves action selection processes: a randomised controlled trial
…so, hopefully this experiment will be repeated, without disappearing participants!
The sweet spot
You may be wondering how something that slows a person down (having a relaxing effect) can also speed a person up. This has to do with what it is and isn’t affecting; think of it like a “focus mode” on your computer or other device that greys-out everything else a bit so that you can focus on what you’re doing.
It’s in some ways (by different neurochemical pathways, though) a similar effect to the “relaxed alertness” created by l-theanine supplementation.
There’s also a sweet spot whereby GABA is toning some things down just the right amount, without adversely affecting performance in areas we don’t want slowed down. For the science of this, see:
Is it safe?
GABA is “Generally Recognized As Safe”. However:
- you should speak with your pharmacist if you are taking any medications for blood pressure or epilepsy, as GABA supplementation may cause them to work too well.
- you should absolutely not take GABA with alcohol or opioids as (dose-dependent for all the substances involved, and also depending on your metabolic base rate and other factors) its acute depression of the CNS can mean you relax and slow down too much, and you may find yourself not breathing often enough to sustain life.
Aside from that, it is considered safe up to at least 1g/kg/day*. Given that popular doses are 120–750mg, and most people weigh more than 750g, this is very safe for most people:
United States Pharmacopeia (USP) Safety Review of Gamma-Aminobutyric Acid (GABA)
Where can I get it?
We don’t sell it, but for your convenience, here’s an example product on Amazon
Enjoy!
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Staying Strong: Tips To Prevent Muscle Loss With Age
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Dr. Andrea Furlan, specialist in physical medicine and rehabilitation with 30 years of experience, has advice:
Fighting sarcopenia
Sarcopenia is so common as to be considered “natural”, but “natural” does not mean “obligatory” and it certainly doesn’t mean “healthy”. As for how to fight it?
You may be thinking “let us guess, is it eat protein and do resistance exercises? And yes it is, but that’s only part of it…
Firstly, she recommends remembering why you are doing this, or because understanding is key to compliance (i.e. your perfect diet and exercise program will mean nothing if you don’t actually do it, and you won’t do it enough to make it a habit, let alone keep it up, if the reasons aren’t clear in your mind).
Sarcopenia comes with an increased risk of falls, reduced physical capacity in general, resultant disability, social isolation, and depression. Of course, this is not a one-to-one equation; you will not necessarily become depressed the moment your muscle mass is below a certain percentage, but statistically speaking, the road to ruin is laid out clearly.
Secondly, she recommends being on the lookout for it. If you check your body composition regularly with a gadget, that’s great and laudable; if you don’t, then a) consider getting one (here’s an example product on Amazon), and b) watch out for decreased muscle strength, fatigue, reduced stamina, noticeable body shape changes with muscle loss and (likely) fat gain.
Thirdly, she recommends more than just regular resistance training and good protein intake. Yes, she recommends those things too, but also getting enough water (can’t rebuild the body without it), avoiding a sedentary lifestyle (sitting leads to atrophy of many supporting and stabilizing muscles, you know, the kind of muscles that don’t look flashy but stop you falling down), and getting good sleep—vital for all kinds of body maintenance, and muscle maintenance is no exception (there’s a reason bodybuilders sleep 9–12 hours daily when in a gaining phase; you don’t need to do that, but don’t skimp on your 7–9 hours, yes, really, even you, yes, at any age).
Lastly, she recommends continuing to learn about the topic, as otherwise it’s easy to go off-track.
For more information on all of the above and more, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- Protein: How Much Do We Need, Really?
- Resistance Is Useful! (Especially As We Get Older)
- Resistance Beyond Weights
- HIIT, But Make It HIRT ← this is about high-intensity resistance training (HIRT); confusing the muscles like one confuses the heart in HIIT, which thus yields improved results
- Sleep: Yes, You Really Do Still Need It
Take care!
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Is thirst a good predictor of dehydration?
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Water is essential for daily functioning and health, and we can only survive a few days without it. Yet we constantly lose water through sweat, urination and even evaporation when we breathe.
This is why we have evolved a way to regulate and maintain water in our bodies. Like other animals, our survival relies on a strong biological drive that tells us to find and drink water to balance fluid loss.
This is thirst – a sensation of dryness in the mouth signalling we need to have a drink. This basic physiological mechanism is controlled mainly by part of the brain’s “control centre”, called the hypothalamus. The hypothalamus receives signals from various regions of the body and in return, releases hormones that act as a messenger to signal the thirst sensation.
KieferPix/Shutterstock What is dehydration?
Staying hydrated (having enough water in our bodies) is important for several reasons, including:
- regulating body temperature through sweat and respiration
- lubricating joints and eyes
- preventing infections
- digesting and absorbing nutrients
- flushing out waste (via the kidneys)
- preventing constipation
- brain function (including memory and concentration)
- mood and energy levels
- physical performance and recovery from exercise
- skin health.
Dehydration occurs when our body doesn’t have enough water. Even slight drops in fluid levels have noticeable consequences, such as headaches, feeling dizzy, lethargy and struggling to concentrate.
Chronic dehydration can pose more serious health risks, including urinary tract infections, constipation and kidney stones.
What does the evidence say?
Despite thirst being one of the most basic biological drivers for good hydration, science suggests our feelings of thirst and subsequent fluid intake don’t always correlate with hydration levels.
For example, a recent study explored the impact of thirst on fluid intake and hydration status. Participants attended a lab in the morning and then later in the afternoon to provide markers of hydration status (such as urine, blood samples and body weight). The relationship between levels of thirst in the morning and afternoon hydration status was negligible.
Further, thirst may be driven by environmental factors, such as access to water. For example, one study looked at whether ample access to water in a lab influenced how much people drank and how hydrated they were. The link between how thirsty they felt and how hydrated they were was weak, suggesting the availability of water influenced their fluid intake more than thirst.
Exercise can also change our thirst mechanism, though studies are limited at this stage.
Being thirsty doesn’t necessarily mean we’re dehydrated. puhhha/Shutterstock Interestingly, research shows women experience thirst more strongly than men, regardless of hydration status. To understand gender differences in thirst, researchers infused men and women with fluids and then measured their thirst and how hydrated they were. They found women generally reported thirst at a lower level of fluid loss. Women have also been found to respond more to feeling thirsty by drinking more water.
Other ways to tell if you need to drink some water
While acknowledging some people will need to drink more or less, for many people, eight cups (or two litres) a day is a good amount of water to aim for.
But beyond thirst, there are many other ways to tell whether you might need to drink more water.
1. urine colour: pale yellow urine typically indicates good hydration, while darker, concentrated urine suggests dehydration
2. frequency of going to the toilet: urinating regularly (around four to six times a day) indicates good hydration. Infrequent urination can signal dehydration
3. skin turgor test: gently pinching the skin (for example, on the back of the hand) and observing how quickly the skin returns to its normal position can help assess hydration. Slow return may indicate dehydration
If skin stays elevated after pinching it may be a sign of dehydration. SusaZoom/Shutterstock 4. mouth and lips: a dry mouth or cracked lips can be early signs of dehydration
5. headaches and fatigue: frequent headaches, dizziness, or unexplained fatigue can be signs of inadequate hydration
6. sweating: in physically active people, monitoring how much they sweat during activity can help estimate fluid loss and hydration needs. Higher levels of sweat may predispose a person to dehydration if they are unable to replace the fluid lost through water intake
These indicators, used together, provide a more comprehensive picture of hydration without solely depending on the sensation of thirst.
Of course, if you do feel thirsty, it’s still a good idea to drink some water.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Kiara Too, PhD candidate, School of Human Movement and Nutrition Sciences, The University of Queensland
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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How To Avoid Slipping Into (Bad) Old Habits
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Treating Bad Habits Like Addictions
How often have you started a healthy new habit (including if it’s a “quit this previous thing” new habit), only to find that you slip back into your old ways?
We’ve written plenty on habit-forming before, so here’s a quick recap before we continue:
How To Really Pick Up (And Keep!) Those Habits
…and even how to give them a boost:
How To Keep On Keeping On… Long Term!
But how to avoid the relapses that are most likely to snowball?
Borrowing from the psychology of addiction recovery
It’s well known that someone recovering from substance addiction should not have even a small amount of the thing they were addicted to. Not one sip of champagne at a wedding, not one drag of a cigarette, and so forth.
This can go for other bad habits too; make one exception, and suddenly you have a whole string of “exceptions”, and before you know it, it’s not the exception anymore; it’s the new rule—again.
Three things that can help guard against this are:
- Absolutely refuse to romanticize the bad habit. Do not fall for its marketing! And yes, everything has marketing even if not advertising; for example, consider the Platonic ideal of a junk-food-eating couch-potato who is humble, unassuming, agreeable, the almost-holy idea of homely comfort, and why shouldn’t we be comfortable after all, haven’t we earned our chosen hedonism, and so on. It’s seductive, and we need to make the choice to not be seduced by it. In this case for example, yes pleasure is great, but being sick tired and destroying our bodies is not, in fact, pleasurable in the long run. Which brings us to…
- Absolutely refuse to forget why you dropped that behavior in the first place. Remember what it did to you, remember you at your worst. Remember what you feared might become of you if you continued like that. This is something where journaling helps, by the way; remembering our low points helps us to avoid finding ourselves in the same situation again.
- Absolutely refuse to let your guard down due to an overabundance of self-confidence in your future self. We all can easily feel that tomorrow is a mystical land in which all productivity is stored, and also where we are strong, energized, iron-willed, and totally able to avoid making the very mistakes that we are right now in the process of making. Instead, be that strong person now, for the benefit of tomorrow’s you. Because after all, if it’s going to be easy tomorrow, it’s easy now, right?
The above is a very simple, hopefully practical, set of rules to follow. If you like hard science more though, Yale’s Dr. Steven Melemis offers five rules (aimed more directly at addiction recovery, so this may be a big “heavy guns” for some milder habits):
- change your life
- be completely honest
- ask for help
- practice self-care
- don’t bend the rules
You can read his full paper and the studies it’s based on, here:
Relapse Prevention and the Five Rules of Recovery
“What if I already screwed up?”
Draw a line under it, now, and move forwards in the direction you actually want to go.
Here’s a good article, that saves us taking up more space here; it’s very well-written so we do recommend it:
The Abstinence Violation Effect and Overcoming It
this article gives specific, practical advices, including CBT tools to use
Take care!
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When should you get the updated COVID-19 vaccine?
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Updated COVID-19 vaccines are now available: They’re meant to give you the best protection against the strain of the virus that is making people severely sick and also causing deaths.
Many people were infected during the persistent summer wave, which may leave you wondering when you should get the updated vaccine. The short answer is that it depends on when you last got infected or vaccinated and on your particular level of risk.
We heard from six experts—including medical doctors and epidemiologists—about when they recommend getting an updated vaccine. Read on to learn what they said. And to make it easy, check out the flowchart below.
A flowchart to help you decide when is the best time to get the 2024-2025 updated COVID-19 vaccine. If I was infected with COVID-19 this summer, when should I get the updated vaccine?
All the experts we spoke to agreed that if you were infected this summer, you should wait at least three months since you were infected to get vaccinated.
“Generally, an infection may be protective for about three months,” Dr. Ziyad Al-Aly, chief of research and development at the Veterans Affairs St. Louis Health Care System, tells PGN. “If they got infected three or more months ago, it is a good idea to get vaccinated sooner than later.”
This three-month rule applies if you got vaccinated over the summer, which may be the case for some immunocompromised people, adds Dr. Peter Chin-Hong, professor of medicine at the University of California, San Francisco.
If I didn’t get infected with COVID-19 this summer, when should I get vaccinated?
Most of the experts we talked to say that if you didn’t get infected with COVID-19 this summer, you should get the vaccine as soon as possible. Dr. Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine, emphasizes that if this applies to you, you should get vaccinated as soon as possible, especially given the current COVID-19 surge.
Al-Aly agrees. “Vaccine-derived immunity lasts for several months, and it should cover the winter season. Plus, the current vaccine is a KP.2-adapted vaccine, so it will work most optimally against KP.2 and related subvariants [such as] KP.3 that are circulating now,” Al-Aly says. “We don’t know when the virus will mutate to a variant that is not compatible with the KP.2 vaccine.”
Al-Aly adds that if you’d rather take the protection you can get right now, “It may make more sense to get vaccinated sooner than later.”
This especially applies if you’re over 65 or immunocompromised and you haven’t received a COVID-19 vaccine in a year or more because, as Chin-Hong adds, “that is the group that is being hospitalized and disproportionately dying now.”
Some experts—including epidemiologist Katelyn Jetelina, author of newsletter Your Local Epidemiologist—also say that if you’re younger than 65 and not immunocompromised, you can consider waiting and aiming to get vaccinated before Halloween to get the best protection in the winter, when we’re likely to experience another wave because of the colder weather, gathering indoors, and the holidays.
“I am more worried about the winter than the summer, so I would think of October (some time before Halloween) as the ‘Goldilocks moment’—not too early, not too late, but just right,” Chin-Hong adds. Time it “such that your antibodies peak during the winter when COVID-19 cases are expected to exceed what we are seeing this summer.”
My children are starting school—should I get them vaccinated now?
According to most experts we spoke to, now is a good time to get your children vaccinated.
Jennifer Nuzzo, professor of epidemiology and director of the Pandemic Center at the Brown University School of Public Health, adds that “with COVID-19 infection levels as high as they are and increased exposures in school,” now is a particularly good time to get an updated vaccine if people haven’t gotten COVID-19 recently.
Additionally, respiratory viruses spike when kids are back in school, so “doing everything you can to reduce your child’s risk of infection can help protect families and communities,” says epidemiologist Jessica Malaty Rivera, science communications advisor at the de Beaumont Foundation.
For more information, talk to your health care provider.
(Disclosure: The de Beaumont Foundation is a partner of The Public Good Projects, the organization that owns Public Good News.)
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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