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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Infections Here, Infections There…
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This week in health news, let’s take a look at infections outside and in, and how to walk away from it all (in a good way):
The bird that flu away
This one cannot be described as good news. Basically, bird flu is now already epidemic amongst cows in the US, with 845 herds (not 845 cows; 845 herds) testing positive across 16 states. The US Department of Agriculture earlier this month announced a federal order to test milk nationwide. Researchers welcomed the news, but said it should have happened months ago—before the virus was so entrenched. It currently has a fatality rate of 2–5% in cows; we don’t have enough data to reasonably talk about its fatality rate in humans—yet.
❝It’s disheartening to see so many of the same failures that emerged during the COVID-19 crisis re-emerge❞
~ Tom Bollyky, director of the Global Health Program at the Council on Foreign Relations
Read in full: How America lost control of the bird flu, setting the stage for another pandemic
Related: Cows’ Milk, Bird Flu, & You
Alzheimer’s from the gut upwards
Alzheimer’s is generally thought of as being a purely brain thing, but there’s a link between a [specific] chronic gut infection, and the development of Alzheimer’s disease. This infection is called human cytomegalovirus, or HCMV for short, and usually we’ve all been exposed to it by young adulthood. However, for some people, it lingers in an active state in the gut, wherefrom it may travel to the brain via the vagus nerve “gut-brain highway”. And once there, well, you can guess the rest:
Read in full: The surprising role of gut infection in Alzheimer’s disease
Related: How To Reduce Your Alzheimer’s Risk
Walking back to happiness
Analyzing data from 96,138 adults around the world, showed that more steps meant less depression for participants.
You may be thinking “well yes, depressed people walk less”, but more specifically, increases in activity showed increases in anti-depressive benefits, with even small incremental increases showing correspondingly incremental benefits. Specifically, each additional 1,000 steps per day corresponded to a 9% reduction in depression:
Read in full: Higher daily step counts associated with fewer depressive symptoms
Related: Walking… Better.
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Tight Hamstrings? Here’s A Test To Know If It’s Actually Your Sciatic Nerve
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Tight hamstrings are often not actually due to hamstring issues, but rather, are often being limited by the sciatic nerve. This video offers a home test to determine if the sciatic nerve is causing mobility problems (and how to improve it, if so):
The Connection
Try this test:
- Sit down with a slumped posture.
- Extend one leg with the ankle flexed.
- Note any stretching or pulling sensation behind the knee or in the calf.
- Bring your head down to your chest
If this increases the sensation, it likely indicates sciatic nerve involvement.
If only the hamstrings are tight, head movement won’t change the stretch sensation.
This is because the nervous system is a continuous structure, so head movement can affect nerve tension throughout the body. While this can cause problems, it can also be integral in the solution. Here are two ways:
- Flossing method: sit with “poor” slumped posture, extend the knee, keep the ankle flexed, and lift the head to relieve nerve tension. This movement helps the sciatic nerve slide without stretching it.
- Even easier method: lie on your back, grab behind the knee, and extend the leg while extending the neck. This position avoids compression in the gluteal area, making it suitable for severely compromised nerves. Perform the movement without significant stretching or pain.
In both cases: move gently to avoid straining the nerve, which can worsen muscle tension. Do 10 repetitions per leg, multiple times a day; after a week, increase to 20 reps.
A word of caution: speak with your doctor before trying these exercises if you have underlying neurological diseases, cut or infected nerves, or other severe conditions.
For more on all of this, plus visual demonstrations, enjoy:
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Want to learn more?
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Exercises for Sciatica Pain Relief
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What Different Kinds of Hair Loss/Thinning Say About Your Health
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Dr. Siobhan Deshauer shows us different kinds of hair loss, what causes them, and what can be done about them:
Many different causes
Here’s how to tell them apart:
- Alopecia areata is an autoimmune condition where the immune system mistakenly attacks hair follicles, causing hair loss that can occur at any age and affects about 1 in 50 people. It often presents as smooth patches of hair loss and can be treated with steroid injections. Severe cases may require high-dose prednisone, which can restore hair growth over time.
- Discoid lupus is an autoimmune disease that affects the skin, leading to inflammation, scarring, and permanent hair loss. Unlike alopecia areata, it causes visible damage to the scalp and hair follicles. This type of lupus typically does not involve internal organs, unlike systemic lupus.
- Telogen effluvium occurs when a major systemic shock, such as an infection, surgery, or significant stress, triggers many hair follicles to enter the resting phase simultaneously, resulting in delayed hair shedding. The condition is diagnosed with a “hair pull test” and is typically temporary, as the resting phase is followed by normal hair growth phases.
- Allergic reactions to products, such as hair dye containing PPD, can cause hair loss due to scalp irritation and inflammation. An allergic response may trigger hair follicles to enter a resting phase, leading to hair loss by the same mechanism as telogen effluvium. Treatment with steroids can calm the reaction, and hair usually regrows after recovery.
- Syphilis, a sexually transmitted infection, can present with varied symptoms, including hair loss in a distinct moth-eaten pattern. Hair loss due to syphilis is reversible and curable with penicillin treatment, with hair regrowth typically occurring a few months after treatment.
- Biotin deficiency is rare due to its production by gut bacteria and presence in foods such as nuts, seeds, and beans such as soybeans. Deficiency can result from excessive consumption of raw egg whites, which block absorption. Severe deficiency causes hair loss and skin issues but can be treated effectively with biotin supplements.
- Iron deficiency anemia can cause hair thinning along with symptoms like fatigue and breathlessness. It often results from inadequate dietary intake, but can also occur after heavy menstrual bleeding. Treatment with iron supplements, or blood transfusions in severe cases, can restore both hair and energy levels, leading to significant improvements.
- Trichotillomania is a psychological condition marked by an uncontrollable urge to pull out one’s hair, often associated with anxiety or depression. Hair patches may show different stages of regrowth. While it can be challenging to manage, the condition can be treated with appropriate psychological and medical support.
- Traction alopecia results from hairstyles that exert prolonged tension on the hair, causing it to thin or fall out. This type of hair loss can be prevented by reducing the strain on the hair. Loosening hairstyles and giving the scalp a break can help hair regrow over time.
- Hypothyroidism causes symptoms like fatigue, dry skin, and hair thinning due to insufficient thyroid hormone production—however, it can be managed with diet, and if necessary, thyroid medications.
- Zinc deficiency may also cause hair loss and a characteristic rash. Treatment with zinc supplements can significantly improve hair growth and other symptoms.
- Medications, such as chemotherapy drugs, Accutane, and anti-seizure medications like valproic acid, are known to cause hair loss as a side effect. This type of hair loss is often reversible once the medication is stopped.
- Male pattern hair loss, or androgenic alopecia, is influenced by testosterone and genetic risk factors—which, contrary to popular belief, can come from either or both sides of the family. Early onset, especially before age 40, is linked to an increased risk of heart disease. However, effective treatments are available, and early intervention is beneficial.
- Female pattern hair loss is basically the same thing as male pattern hair loss (indeed, it is literally still androgenic alopecia), just a) almost always much less severe and b) with a gender-appropriate name. It affects up to 40% of women by age 50 and is characterized by thinning hair at the top of the head. It’s related to hormonal imbalances involving testosterone, such as those seen in PCOS and menopause, amongst other less common causes. Early treatment can be effective, and research is ongoing to develop more targeted therapies.
Dr. Siobhan Deshauer advises, if you’re experiencing hair loss, to monitor other symptoms too if applicable, take photos for tracking, and consult a doctor early for diagnosis and potential treatment.
For more on all of this plus visual illustrations, enjoy:
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From Lupus To Arthritis: New Developments
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This week’s health news round-up highlights some things that are getting better, and some things that are getting worse, and how to be on the right side of both:
New hope for lupus sufferers
Lupus is currently treated mostly with lifelong medications to suppress the immune system, which is not only inconvenient, but also can leave people more open to infectious diseases. The latest development uses CAR T-cell technology (as has been used in cancer treatment for a while) to genetically modify cells to enable the body’s own immune system to behave properly:
Read in full: Exciting new lupus treatment could end need for lifelong medication
Related: How to Prevent (Or Reduce The Severity Of) Inflammatory Diseases
It’s in the hips
There are a lot of different kinds of hip replacements, and those with either delta ceramic or oxidised zirconium head with a highly cross-linked polyethylene liner/cup have the lowest risk of need for revision in the 15 years after surgery. This is important, because obviously, once it’s in there, you want it to be able to stay in there and not have to be touched again any time soon:
Read in full: Study identifies hip implant materials with the lowest risk of needing revision
Related: Nobody Likes Surgery, But Here’s How To Make It Much Less Bad
Sooner is better than later
Often, people won’t know about an unwanted pregnancy in the first six weeks, but for those who are able to catch it early, Very Early Medical Abortion (VEMA) offers a safe an effective way of doing so, with success rate being linked to earliness of intervention:
Read in full: Very early medication abortion is effective and safe, study finds
Related: What Might A Second Trump Presidency Look Like for Health Care?
Increased infectious disease risks from cattle farms
Many serious-to-humans infectious diseases enter the human population via the animal food chain, and in this case, bird flu becoming more rampant amongst cows is starting to pose a clear threat to humans, so this is definitely something to be aware of:
Read in full: Bird flu infects 1 in 14 dairy workers exposed; CDC urges better protections
Related: With Only Gloves To Protect Them, Farmworkers Say They Tend Sick Cows Amid Bird Flu
Herald of woe
Gut health affects most of the rest of health, and there are a lot of links between gut and bone health. In this case, an association has been found between certain changes in the gut microbiome, and subsequent onset of rheumatoid arthritis:
Read in full: Changes in gut microbiome could signal onset of rheumatoid arthritis
Related: Stop Sabotaging Your Gut
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The FDA Just Redefined “Healthy”—But How?
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In the ongoing war of labelling regulations (usually with advertisers on one side and regulators on the other), the FDA has updated what’s required in order to label a food as “healthy”.
Here’s what they’re now* requiring:
To bear the “healthy” claim, a food product needs to:
- Contain a certain amount of food (food group equivalent) from at least one of the food groups or subgroups (such as fruits, vegetables, fat-free and low-fat dairy etc.) recommended by the Dietary Guidelines.
- Adhere to specified limits for the following nutrients: saturated fat, sodium, and added sugars.
Source: FDA | Press Releases | FDA Finalizes Updated “Healthy” Nutrient Content Claim
*however, manufacturers have 3 years to conform, which if we’re being cynical about it, looks suspiciously like just short of a US presidential election cycle so that actual enforcement will be someone else’s problem.
Will it help?
Maybe! It’s not too dissimilar to the “traffic light system” already in use in Europe, although that currently emphasizes the absence/presence of “bad things” e.g. saturated fat, sodium, and added sugars.
It has its faults, because for example…
- not all saturated fat is bad, and a jar of coconut oil is now definitely going to get labelled as very unhealthy
- low-sodium salt is, ironically, going to to get flagged as being very high in sodium and therefore unhealthy
This latter is because on a g/100g basis, a product that’s ⅓ sodium chloride is going to have a lot of sodium, even if it’s approaching ⅔ less sodium than the product it’s (healthily!) replacing.
However, on a large scale, these kinds of problems are surely going to be small next to (hopefully) manufacturers scrambling to find ways to cut down on the saturated fats, sodium, and added sugars.
You may be wondering…
What will they replace them with?
Sometimes, companies trying to make something healthier will mess up, like when the health risks of smoking hit public consciousness, one cigarette company had the bright idea of putting asbestos in their filter tips, to market them as healthier. So, could something similar happen here?
- Saturated fat: definitely could; because the health benefits/risks of different kinds of fats and their constituent fatty acids are a lot more nuanced than just “saturated” vs “mono-/polyunsaturated”, it is definitely possible that companies may replace healthier saturated-heavy fats with less healthy unsaturated fats, depending on what is cheaper.
- See also: Can Saturated Fats Be Healthy?
- Sodium: probably not; likely go-to replacements for sodium chloride will be potassium chloride (healthier than sodium chloride) and MSG (has an unearned bad reputation in the US, but is healthier than sodium chloride).
- Added sugars: probably—things get very complicated very quickly when it comes to artificial sweeteners, and also the crux will definitely lie in what gets defined as an “added sugar”; watch out for a rise in the use of things that slide by the definition of added sugar while still being chemically (and, which is important, metabolically) the same thing.
Well that doesn’t sound great
It doesn’t, but on the flipside, the positive inclusions will probably be mostly good.
For example, the only way to get a “healthy” labelling in including fiber is to include more fiber, same with vitamins and minerals.
The low-fat dairy thing could possibly get abused (much like with the general “low-fat” trend of the 80s).
The “portion of fruit” thing will need to be carefully defined to avoid running straight back into the “this is just added sugar by another name” problem; mostly that it’ll need to still include the same amount of fiber as was in the whole fruit, gram for gram.
See also: What Matters Most For Your Heart? ← it’s about fiber, not salt or saturated fats!
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Thinking about trying physiotherapy for endometriosis pain? Here’s what to expect
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Endometriosis is a condition that affects women and girls. It occurs when tissue similar to the lining of the uterus ends up in other areas of the body. These areas include the ovaries, bladder, bowel and digestive tract.
Endometriosis will affect nearly one million Australian women and girls in their lifetime. Many high-profile Australians are affected by endometriosis including Bindi Irwin, Sophie Monk and former Yellow Wiggle, Emma Watkins.
Symptoms of endometriosis include intense pelvic, abdominal or low back pain (that is often worse during menstruation), bladder and bowel problems, pain during sex and infertility.
But women and girls wait an average of seven years to receive a diagnosis. Many are living with the burden of endometriosis and not receiving treatments that could improve their quality of life. This includes physiotherapy.
Netpixi/Shutterstock How is endometriosis treated?
No treatments cure endometriosis. Symptoms can be reduced by taking medications such as non-steriodal anti-inflammatories (ibuprofen, aspirin or naproxen) and hormonal medicines.
Surgery is sometimes used to diagnose endometriosis, remove endometrial lesions, reduce pain and improve fertility. But these lesions can grow back.
Whether they take medication or have surgery, many women and girls continue to experience pain and other symptoms.
Pelvic health physiotherapy is often recommended as a non-drug management technique to manage endometriosis pain, in consultation with a gynaecologist or general practitioner.
The goal of physiotherapy treatment depends on the symptoms but is usually to reduce and manage pain, improve ability to do activities, and ultimately improve quality of life.
What could you expect from your first appointment?
Physiotherapy management can differ based on the severity and location of symptoms. Prior to physical tests and treatments, your physiotherapist will comprehensively explain what is going to happen and seek your permission.
They will ask questions to better understand your case and specific needs. These will include your age, weight, height as well as the presence, location and intensity of symptoms.
You will also be asked about the history of your period pain, your first period, the length of your menstrual cycle, urinary and bowel symptoms, sexual function and details of any previous treatments and tests.
They may also assess your posture and movement to see how your muscles have changed because of the related symptoms.
During the consultation, your physio will assess you for painful areas and muscle tightness. Netpixi/Shutterstock They will press on your lower back and pelvic muscles to spot painful areas (trigger points) and muscle tightness.
If you consent to a vaginal examination, the physiotherapist will use one to two gloved fingers to assess the area inside and around your vagina. They will also test your ability to coordinate, contract and relax your pelvic muscles.
What type of treatments could you receive?
Depending on your symptoms, your physiotherapist may use the following treatments:
General education
Your physiotherapist will give your details about the disease, pelvic floor anatomy, the types of treatment and how these can improve pain and other symptoms. They might teach you about the changes to the brain and nerves as a result of being in long-term pain.
They will provide guidance to improve your ability to perform daily activities, including getting quality sleep.
If you experience pain during sex or difficulty using tampons, they may teach you how to use vaginal dilators to improve flexibility of those muscles.
Pelvic muscle exercises
Pelvic muscles often contract too hard as a result of pain. Pelvic floor exercises will help you contract and relax muscles appropriately and provide an awareness of how hard muscles are contracting.
This can be combined with machines that monitor muscle activity or vaginal pressure to provide detailed information on how the muscles are working.
Yoga, stretching and low-impact exercises
Yoga, stretching and low impact aerobic exercise can improve fitness, flexibility, pain and blood circulation. These have general pain-relieving properties and can be a great way to contract and relax bigger muscles affected by long-term endometriosis.
These exercises can help you regain function and control with a gradual progression to perform daily activities with reduced pain.
Low-impact exercise can reduce pain. ABO Photography/Shutterstock Hydrotherapy (physiotherapy in warm water)
Performing exercises in water improves blood circulation and muscle relaxation due to the pressure and warmth of the water. Hydrotherapy allows you to perform aerobic exercise with low impact, which will reduce pain while exercising.
However, while hydrotherapy shows positive results clinically, scientific studies to show its effectiveness studies are ongoing.
Manual therapy
Women frequently have small areas of muscle that are tight and painful (trigger points) inside and outside the vagina. Pain can be temporarily reduced by pressing, massaging or putting heat on the muscles.
Physiotherapists can teach patients how to do these techniques by themselves at home.
What does the evidence say?
Overall, patients report positive experiences pelvic health physiotherapists treatments. In a study of 42 women, 80% of those who received manual therapy had “much improved pain”.
In studies investigating yoga, one study showed pain was reduced in 28 patients by an average of 30 points on a 100-point pain scale. Another study showed yoga was beneficial for pain in all 15 patients.
But while some studies show this treatment is effective, a review concluded more studies were needed and the use of physiotherapy was “underestimated and underpublicised”.
What else do you need to know?
If you have or suspect you have endometriosis, consult your gynaecologist or GP. They may be able to suggest a pelvic health physiotherapist to help you manage your symptoms and improve quality of life.
As endometriosis is a chronic condition you may be entitled to five subsidised or free sessions per calendar year in clinics that accept Medicare.
If you go to a private pelvic health physiotherapist, you won’t need a referral from a gynaecologist or GP. Physiotherapy rebates can be available to those with private health insurance.
The Australian Physiotherapy Association has a Find a Physio section where you can search for women’s and pelvic physiotherapists. Endometriosis Australia also provides assistance and advice to women with Endometriosis.
Thanks to UTS Masters students Phoebe Walker and Kasey Collins, who are researching physiotherapy treatments for endometriosis, for their contribution to this article.
Peter Stubbs, Senior Lecturer in Physiotherapy, University of Technology Sydney and Caroline Wanderley Souto Ferreira, Visiting Professor of Physiotherapy, University of Technology Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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