You can thaw and refreeze meat: five food safety myths busted
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This time of year, most fridges are stocked up with food and drinks to share with family and friends. Let’s not make ourselves and our guests sick by getting things wrong when preparing and serving food.
As the weather warms up, so does the environment for micro-organisms in foods, potentially allowing them to multiply faster to hazardous levels. So put the drinks on ice and keep the fridge for the food.
But what are some of those food safety myths we’ve long come to believe that aren’t actually true?
Myth 1: if you’ve defrosted frozen meat or chicken you can’t refreeze it
From a safety point of view, it is fine to refreeze defrosted meat or chicken or any frozen food as long as it was defrosted in a fridge running at 5°C or below. Some quality may be lost by defrosting then refreezing foods as the cells break down a little and the food can become slightly watery.
Another option is to cook the defrosted food and then divide into small portions and refreeze once it has stopped steaming. Steam in a closed container leads to condensation, which can result in pools of water forming. This, combined with the nutrients in the food, creates the perfect environment for microbial growth. So it’s always best to wait about 30 minutes before refrigerating or freezing hot food.
Plan ahead so food can be defrosted in the fridge, especially with large items such as a frozen turkey or roll of meat. If left on the bench, the external surface could be at room temperature and micro-organisms could be growing rapidly while the centre of the piece is still frozen!
Myth 2: Wash meat before you prepare and/or cook it
It is not a good idea to wash meats and poultry when preparing for cooking. Splashing water that might contain potentially hazardous bacteria around the kitchen can create more of a hazard if those bacteria are splashed onto ready-to-eat foods or food preparation surfaces.
It is, however, a good idea to wash fruits and vegetables before preparing and serving, especially if they’re grown near or in the ground as they may carry some dirt and therefore micro-organisms.
This applies particularly to foods that will be prepared and eaten without further cooking. Consuming foods raw that traditionally have been eaten cooked or otherwise processed to kill pathogenic micro-organisms (potentially deadly to humans) might increase the risk of food poisoning.
Fruit, salad, vegetables and other ready-to-eat foods should be prepared separately, away from raw meat, chicken, seafood and other foods that need cooking.
Myth 3: Hot food should be left out to cool completely before putting it in the fridge
It’s not OK to leave perishable food out for an extended time or overnight before putting it in the fridge.
Micro-organisms can grow rapidly in food at temperatures between 5° and 60°C. Temperature control is the simplest and most effective way of controlling the growth of bacteria. Perishable food should spend as little time as possible in the 5-60°C danger zone. If food is left in the danger zone, be aware it is potentially unsafe to eat.
Hot leftovers, and any other leftovers for that matter, should go into the fridge once they have stopped steaming to reduce condensation, within about 30 minutes.
Large portions of hot food will cool faster if broken down into smaller amounts in shallow containers. It is possible that hot food such as stews or soup left in a bulky container, say a two-litre mixing bowl (versus a shallow tray), in the fridge can take nearly 24 hours to cool to the safe zone of less than 5°C.
Myth 4: If it smells OK, then it’s OK to eat
This is definitely not always true. Spoilage bacteria, yeasts and moulds are the usual culprits for making food smell off or go slimy and these may not make you sick, although it is always advisable not to consume spoiled food.
Pathogenic bacteria can grow in food and not cause any obvious changes to the food, so the best option is to inhibit pathogen growth by refrigerating foods.
Myth 5: Oil preserves food so it can be left at room temperature
Adding oil to foods will not necessarily kill bugs lurking in your food. The opposite is true for many products in oil if anaerobic micro-organisms, such as Clostridium botulinum (botulism), are present in the food. A lack of oxygen provides perfect conditions for their growth.
Outbreaks of botulism arising from consumption of vegetables in oil – including garlic, olives, mushrooms, beans and hot peppers – have mostly been attributed to the products not being properly prepared.
Vegetables in oil can be made safely. In 1991, Australian regulations stipulated that this class of product (vegetables in oil) can be safely made if the pH (a measure of acid) is less than 4.6. Foods with a pH below 4.6 do not in general support the growth of food-poisoning bacteria including botulism.
So keep food out of the danger zone to reduce your guests’ risk of getting food poisoning this summer. Check out other food safety tips and resources from CSIRO and the Food Safety Information Council, including testing your food safety knowledge.
Cathy Moir, Team leader, Microbial and chemical sciences, Food microbiologist and food safety specialist, CSIRO
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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It’s Not Fantastic To Be Plastic
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We Are Such Stuff As Bottles Are Made Of
We’ve written before about PFAS, often found in non-stick coatings and the like:
PFAS Exposure & Cancer: The Numbers Are High
Today we’re going to be talking about microplastics & nanoplastics!
What are microplastics and nanoplastics?
Firstly, they’renot just the now-banned plastic microbeads that have seen some use is toiletries (although those are classified as microplastics too).
Many are much smaller than that, and if they get smaller than a thousandth of a millimeter, then they get the additional classification of “nanoplastic”.
In other words: not something that can be filtered even if you were to use a single-micron filter. The microplastics would still get through, for example:
Scientists find about a quarter million invisible nanoplastic particles in a liter of bottled water
And unfortunately, that’s bad:
❝What’s disturbing is that small particles can appear in different organs and may cross membranes that they aren’t meant to cross, such as the blood-brain barrier❞
Note: they’re crossing the same blood-brain barrier that many of our nutrients and neurochemicals are too big to cross.
These microplastics are also being found in arterial plaque
What makes arterial plaque bad for the health is precisely its plasticity (the arterial walls themselves are elastic), so you most certainly do not want actual plastic being used as part of the cement that shouldn’t even be lining your arteries in the first place:
Microplastics found in artery plaque linked with higher risk of heart attack, stroke and death
❝In this study, patients with carotid artery plaque in which MNPs were detected had a higher risk of a composite of myocardial infarction, stroke, or death from any cause at 34 months of follow-up than those in whom MNPs were not detected❞
~ Dr. Raffaele Marfella et al.
(MNP = Micro/Nanoplastics)
Source: Microplastics and Nanoplastics in Atheromas and Cardiovascular Events
We don’t know how bad this is yet
There are various ways this might not be as bad as it looks (the results may not be repeated, the samples could have been compromised, etc), but also, perhaps cynically but nevertheless honestly, it could also be worse than we know yet—only more experiments being done will tell us which.
In the meantime, here’s a rundown of what we do and don’t know:
Study links microplastics with human health problems—but there’s still a lot we don’t know
Take care!
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What should I do if I can’t see a psychiatrist?
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People presenting at emergency with mental health concerns are experiencing the longest wait times in Australia for admission to a ward, according to a new report from the Australasian College of Emergency Medicine.
But with half of New South Wales’ public psychiatrists set to resign next week after ongoing pay disputes – and amid national shortages in the mental health workforce – Australians who rely on psychiatry support may be wondering where else to go.
If you can’t get in to see a psychiatrist and you need help, there are some other options. However in an emergency, you should call 000.
Why do people see a psychiatrist?
Psychiatrists are doctors who specialise in mental health and can prescribe medication.
People seek or require psychiatry support for many reasons. These may include:
- severe depression, including suicidal thoughts or behaviours
- severe anxiety, panic attacks or phobias
- post-traumatic stress disorder (PTSD)
- eating disorders, such as anorexia or bulimia
- attention deficit hyperactivity disorder (ADHD).
Psychiatrists complement other mental health clinicians by prescribing certain medications and making decisions about hospital admission. But when psychiatry support is not available a range of team members can contribute to a person’s mental health care.
Can my GP help?
Depending on your mental health concerns, your GP may be able to offer alternatives while you await formal psychiatry care.
GPs provide support for a range of mental health concerns, regardless of formal diagnosis. They can help address the causes and impact of issues including mental distress, changes in sleep, thinking, mood or behaviour.
The GP Psychiatry Support Line also provides doctors advice on care, prescription medication and how support can work.
It’s a good idea to book a long consult and consider taking a trusted person. Be explicit about how you’ve been feeling and what previous supports or medication you’ve accessed.
What about psychologists, counsellors or community services?
Your GP should also be aware of supports available locally and online.
For example, Head to Health is a government initiative, including information, a nationwide phone line, and in-person clinics in Victoria. It aims to improve mental health advice, assessment and access to treatment.
Medicare Mental Health Centres provide in-person care and are expanding across Australia.
There are also virtual care services in some areas. This includes advice on individualised assessment including whether to go to hospital.
Some community groups are led by peers rather than clinicians, such as Alternatives to Suicide.
How about if I’m rural or regional?
Accessing support in rural or regional areas is particularly tough.
Beyond helplines and formal supports, other options include local Suicide Prevention Networks and community initiatives such as ifarmwell and Men’s sheds.
Should I go to emergency?
As the new report shows, people who present at hospital emergency departments for mental health should expect long wait times before being admitted to a ward.
But going to a hospital emergency department will be essential for some who are experiencing a physical or mental health crisis.
Managing suicide-related distress
With the mass resignation of NSW psychiatrists looming, and amid shortages and blown-out emergency waiting times, people in suicide-related distress must receive the best available care and support.
Roughly nine Australians die by suicide each day. One in six have had thoughts of suicide at some point in their lives.
Suicidal thoughts can pass. There are evidence-based strategies people can immediately turn to when distressed and in need of ongoing care.
Safety planning is a popular suicide prevention strategy to help you stay safe.
What is a safety plan?
This is a personalised, step-by-step plan to remain safe during the onset or worsening of suicidal urges.
You can develop a safety plan collaboratively with a clinician and/or peer worker, or with loved ones. You can also make one on your own – many people like to use the Beyond Now app.
Safety plans usually include:
- recognising personal warning signs of a crisis (for example, feeling like a burden)
- identifying and using internal coping strategies (such as distracting yourself by listening to favourite music)
- seeking social supports for distraction (for example, visiting your local library)
- letting trusted family or friends know how you’re feeling – ideally, they should know they’re in your safety plan
- knowing contact details of specific mental health services (your GP, mental health supports, local hospital)
- making the environment safer by removing or limiting access to lethal means
- identifying specific and personalised reasons for living.
Our research shows safety planning is linked to reduced suicidal thoughts and behaviour, as well as feelings of depression and hopelessness, among adults.
Evidence from people with lived experience shows safety planning helps people to understand their warning signs and practice coping strategies.
Sharing your safety plan with loved ones may help understand warning signs of a crisis. Dragana Gordic/Shutterstock Are there helplines I can call?
There are people ready to listen, by phone or online chat, Australia-wide. You can try any of the following (most are available 24 hours a day, seven days a week):
Suicide helplines:
- Lifeline 13 11 14
- Suicide Call Back Service 1300 659 467
There is also specialised support:
- for men: MensLine Australia 1300 78 99 78
- children and young people: Kids’ Helpline 1800 55 1800
- Aboriginal and Torres Strait Islander people: 13YARN 13 92 76
- veterans and their families: Open Arms 1800 011 046
- LGBTQIA+ community: QLife 1300 184 527
- new and expecting parents: PANDA 1300 726 306
- people experiencing eating disorders: Butterfly Foundation 1800 33 4673.
Additionally, each state and territory will have its own list of mental health resources.
With uncertain access to services, it’s helpful to remember that there are people who care. You don’t have to go it alone.
Monika Ferguson, Senior Lecturer in Mental Health, University of South Australia and Nicholas Procter, Professor and Chair: Mental Health Nursing, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Other Circadian Rhythms
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We’ve talked before about how circadian rhythm pertains not just to when it is ideal for us to sleep or be awake, but also at what times it is best to eat, exercise, and so forth:
The Circadian Rhythm: Far More Than Most People Know
Most people just know about the light consideration, per for example:
- How light can shift your mood and mental health, and
- How light tells you when to sleep, focus and poo
When your body parts clock on and off at the wrong time…
Now, new research has brought attention to how these things and more are governed by different physiological clocks within our bodies—and what this means for our health. In other words, if you are doing the various things at different times than you “should”, you will be training the different parts of your body (each with their independent clocks) to be on a different schedule, and so the different parts of your body will out of temporal sync with each other.
To put this in jet-lag terms: if your brain is in New York, while your heart is in Istanbul (not Constantinople) and your gut is in Tokyo, then this arrangement is not good for the health.
As for how it is not good for your health (i.e. the consequences) there’s still research to be done on some of the longer-term implications, but in the short term, one of the biggest effects is on our mood—most notably, increasing depression scores significantly.
And even more importantly, this is in the real world. That is to say, until quite recently, most data we had from studies on the circadian rhythm was from sleep clinic laboratories, which is great for RCTs but will always have as a limitation that someone sleeping in a lab is going to have some differences than someone sleeping in their own bed at home.
As the researchers said:
❝A critical step to addressing this is the noninvasive collection of physiological time-series data outside laboratory settings in large populations. Digital tools offer promise in this endeavor. Here, using wearable data, we first quantify the degrees of circadian disruption, both between different internal rhythms and between each internal rhythm and the sleep-wake cycle. Our analysis, based on over 50,000 days of data from over 800 first-year training physicians, reveals bidirectional links between digital markers of circadian disruption and mood both before and after they began shift work, while accounting for confounders such as demographic and geographic variables. We further validate this by finding clinically relevant changes in the 9-item Patient Health Questionnaire score.❞
Read in full: The real-world association between digital markers of circadian disruption and mental health risks
That questionnaire by the way sounds like an arbitrary thing they just made up, but the PHQ-9 (as it is known to its friends) is in fact the current intentional gold standard for measuring depression; we share it at the top of our article about depression, here:
The Mental Health First-Aid That You’ll Hopefully Never Need ← the test takes 2 minutes and you get immediate results
Want to know more?
For more about getting one’s entire self back into temporal sync (hey, wasn’t that the plot of a Star Trek episode?), sleep specialist Dr. Michael Breus wrote this excellent book that we reviewed a little while back:
Enjoy!
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Your Science-Based Guide To Losing Fat & Toning Up
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This health coach researched the science and crunched the numbers so that you don’t have to:
Body by the numbers
Let’s get mathematical:
Total Daily Energy Expenditure (TDEE) consists of:
- Basal Metabolic Rate (BMR): 70% of daily calorie burn (basic body functions, of which the brain is the single biggest calorie-burner)
- Non-Exercise Activity Thermogenesis (NEAT): 15% (the normal movements that occur as you go about your daily life)
- Exercise Activity: 5% (actual workouts, often overestimated)
- Thermic Effect of Food (TEF): 10% (energy needed for digestion)
Basic BMR estimate:
- Women: body weight (kg) × 0.9 × 24
- Men: body weight (kg) × 24
But yours may differ, so if you have a fitness tracker or other gadget that estimates it for you, go with that!
Note: muscle burns calories just to maintain it, making muscle mass crucial to increasing one’s BMR.
And now some notes about running a caloric deficit:
- Safe caloric deficit: no more than 500 calories/day.
- Absolute minimum daily intake: 1,200 calories (women), 1,500 calories (men) (not sustainable long-term).
- Tracking calories is useful but not always accurate.
- Extreme calorie restriction slows metabolism and can lead to binge-eating.
- Your body will adjust to calorie deficits over time, making long-term drastic deficits ineffective.
Diet for fat loss & muscle gain:
- Protein Intake: 1.5–2g per pound of body weight.
- Aim for 30g of protein per meal (supports muscle & satiety).
- Protein has a higher thermic effect (20-30%) than carbs (5-10%) & fats (2-4%), meaning more calories are burned digesting protein.
- Fats are essential for hormone health & satiety (0.5–1g per kg of body weight).
- Carbs should be complex (whole grains, vegetables, fruits, etc.).
- Avoid excessive simple carbs (sugar, white bread, white pasta, etc) to maintain stable hunger signals.
- Hydration is key for appetite control & metabolism (often mistaken for hunger).
Exercise for fat loss & muscle gain:
- Resistance training (3-5x per week) is essential for toning & metabolism.
- Cardio is NOT necessary for fat loss but good for overall health.
- NEAT (non-exercise movement) burns significant calories (walking, taking stairs, fidgeting, etc.).
- “Hot girl walks” & daily movement can significantly aid weight loss.
- Women won’t get “bulky” from weight training unless they eat like a bodybuilder (i.e. several times the daily caloric requirement).
Some closing words in addition:
Poor sleep reduces fat loss by 50% and increases hunger. High stress levels lead to fat retention and cravings for unhealthy foods. Thus, managing stress & sleep is as important as diet & exercise for body transformation!
For more on all of this (plus the sources for the science), enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
How To Lose Weight (Healthily) ← our own main feature about such; we took a less numbers-based, more principles-based, approach. Both approaches work, so go with whichever suits your personal preference more!
Take care!
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Why We Get Fat: And What to Do About It – by Gary Taubes
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We’ve previously reviewed Taubes’ “The Case Against Sugar“. What does this one bring differently?
Mostly, it’s a different focus. Unsurprisingly, Taubes’ underlying argument is the same: sugar is the biggest dietary health hazard we face. However, this book looks at it specifically through the lens of weight loss, or avoiding weight gain.
Taubes argues for low-carb in general; he doesn’t frame it specifically as the ketogenic diet here, but that is what he is advocating. However, he also acknowledges that not all carbs are created equal, and looks at several categories that are relatively better or worse for our insulin response, and thus, fat management.
If the book has a fault it’s that it does argue a bit too much for eating large quantities of meat, based on Weston Price’s outdated and poorly-conducted research. However, if one chooses to disregard that, the arguments for a low-carb diet for weight management remain strong.
Bottom line: if you’d like to cut some fat without eating less (or exercising more), this book offers a good, well-explained guide for doing so.
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Good Energy – by Dr. Casey Means
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For a book with a title like “Good Energy” and chapters such as “Bad Energy Is the Root of Disease”, this is actually a very science-based book (and there are a flock of well-known doctors saying so in the “praise for” section, too).
The premise is simple: most of our health is a matter of what our metabolism is (or isn’t) doing, and it’s not just a case of “doing more” or “doing less”. Indeed, a lot of “our” energy is expended doing bad things (such as chronic inflammation, to give an obvious example).
Dr. Means outlines about a dozen things many people do wrong, and about a dozen things we can do right, to get our body’s energy system working for us, rather than against us.
The style here is pop-science throughout, and in the category of criticism, the bibliography is offloaded to her website (we prefer to have things in our hands). However, the information here is good, clearly-presented, and usefully actionable.
Bottom line: if you ever find yourself feeling run-down and like your body is using your resources against you rather than for you, this is the book to get you out of that slump!
Click here to check out Good Energy, and get your metabolism working for you!
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