How Safe Is It To Use Microwave For Reheating Food?

Updated Feb 9, 2025 | 09:00 AM IST

SummaryAccording to research, when certain plastics are subjected to heat, they produce compounds such as phthalates and bisphenol A (BPA). These substances have been associated to hormonal disturbance, metabolic problems, and perhaps reproductive concerns.
Microwaving food

Microwaves are a common appliance in every household now. You will see it in kitchens of not just houses, but offices, cafeterias, and co working space. However, there are studies that show that heating food in a microwave could be a health concern. While it does come handy, there are questions about harmful radiation and nutrient loss and heating safety that still linger.

Does Microwave Destroy The Nutrients In Food While Heating?

Some research suggests that microwaving may cause nutritional loss, particularly in vegetables. For example, studies have shown that microwaving broccoli with water diminishes its flavonoid content, which are anti-inflammatory compounds. However, experts note that cooking method and duration have a significant influence on nutrient retention.

Surprisingly, several studies indicate that microwaving preserves more nutrients than traditional cooking methods. A study comparing microwaved versus oven-cooked ready meals found that the microwaved version contained somewhat more vitamin C. Another study discovered that microwaving some vegetables, such as broccoli and green beans, may retain more beneficial compounds than boiling.

Ultimately, the nutrient loss really vary on the type of food which is being heated and how it is being cooked. Experts also recommend using minimal water and shorter cooking times to maximize the nutrient retention.

Is Heating In Plastic Safe?

Plastic containers and heating food in it, has always been a topic of debate. While containers do come with microwave-safe stamps, is it really safe to heat them with food?

According to research, when certain plastics are subjected to heat, they produce compounds such as phthalates and bisphenol A (BPA). These substances have been associated to hormonal disturbance, metabolic problems, and perhaps reproductive concerns.

A study also took in account over 400 plastic food containers that were microwave-safe and found that most of them leaked hormone-disrupting chemicals. These are phthalates, warn experts, which are commonly used in food packaging and can interfere with body's hormonal balance, and increase risk of diabetes or even high blood pressure.

Additionally, BPA exposure has been associated with fertility issues and immune system disruptions.

So, what can be done instead?

To minimize this risk, experts recommend using glass or ceramic container when microwaving foods. If you must use a plastic container, make sure the container is not damaged or old, as they are more prone to leach harmful chemicals.

What About The Radiation?

Concerns about microwave radiation have been largely debunked by decades of research. Microwaves use non-ionizing radiation, which does not have enough energy to damage DNA or cause cancer. The electromagnetic waves used in microwaves are similar to those from radios and light bulbs.

Experts emphasize that microwave ovens are designed to contain radiation, preventing exposure. As long as the microwave is in good condition and the door seals properly, there is no significant health risk from microwave radiation.

Other Concerns

Microwaving food could sometimes also lead to uneven cooking and it can create some risks to food safety. Thus, experts advertise to use microwave only to reheat the food and not to actually cook raw food. For safe reheating, food should reach at least 82°C (176°F) throughout to kill bacteria.

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Alzheimer's May Be Detectable Years Before Symptoms, Says Neurology Expert

Updated Jul 3, 2026 | 08:00 PM IST

SummaryAdvanced brain imaging and blood-based biomarkers are offering new hope for detecting Alzheimer's disease before symptoms appear, enabling earlier intervention, personalized care, and better brain health outcomes.
Alzheimer's May Be Detectable Years Before Symptoms, Says Neurology Expert

Image credits: Canva

Alzheimer's disease is one of the most prevalent types of dementia, and one of the biggest challenges is that the disease can begin many years before symptoms such as memory loss, confusion, or difficulty performing daily activities become noticeable. By the time these signs appear, important changes may have already occurred in the brain.

New hope comes from recent advances in diagnostic technologies. Scientists are developing specialized brain imaging techniques that can detect changes associated with Alzheimer's disease long before symptoms develop. These scans can identify abnormal protein deposits, such as amyloid and tau, which are known to play a key role in the disease process. Early identification of these changes may help doctors monitor individuals more closely and initiate timely interventions.

In addition to brain imaging, blood-based biomarkers are emerging as a promising tool for Alzheimer's screening. Recent research has shown that certain proteins linked to Alzheimer's disease can be detected through simple blood tests. While these tests are not yet a replacement for comprehensive evaluation, they may help identify individuals who require further assessment and could make early screening more accessible and affordable in the future.

These advanced tests are not currently recommended as routine screening for everyone, but they represent a significant step forward in early diagnosis and personalized care. Early detection may allow individuals to make informed life decisions, manage risk factors such as diabetes, hypertension, high cholesterol, and obesity, and potentially benefit from newer treatments that are most effective in the early stages before significant brain damage occurs.

Also Read: FSSAI Targets 6 Energy Drink Brands; Experts Link Them to Obesity, Liver Problems

Prevention, early detection, and timely intervention are the keys to the future of Alzheimer's care. As science advances, innovative imaging techniques and blood-based tests could help shift the focus from managing symptoms to identifying risk earlier and preserving quality of life. Early awareness and proactive brain health management remain our strongest tools in the fight against Alzheimer's disease.

Dr. Aparna Gupta, Director, Neurology, ISIC Multispeciality Hospital

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Vitiligo Myths Debunked: It's Not Contagious or Caused by Food

Updated Jul 3, 2026 | 02:04 PM IST

Summary​​There is no significant variation in people of different races, religions, and socio-economic status for predisposition to vitiligo. There is another myth that vitiligo and leprosy are the same, as both present with white skin.
Vitiligo Myths Debunked: It's Not Contagious or Caused by Food

Credit: iStock

Vitiligo is an acquired disorder of depigmentation characterized by white patches on the body. It affects all races. There is a lot of stigma associated with the disease due to disfigurement. The affected persons suffer from psychological distress, low self-esteem, and social neglect. Inadequate knowledge and age-old misconceptions are the key reasons for this undue apprehension associated with this condition.

Common Myths About Vitiligo

There is a misconception that vitiligo can spread by contact. However, vitiligo is non-contagious and does not spread by contact.

Another misconception is that sour food causes vitiligo, which is not scientifically proven. It cannot be transmitted through contact, shared items, or proximity. It is not caused by bacterial, viral, or other infectious agents. It tends to be more noticeable in people with darker skin, due to higher contrast between affected and unaffected areas.

There is no significant variation in people of different races, religions, and socio-economic status for predisposition to vitiligo. There is another myth that vitiligo and leprosy are the same, as both present with white skin.

What Causes Vitiligo?

The exact cause is multifactorial, with hypotheses based on genetic—autoimmune, neural, and biochemical theories. There is a role of acquired factors like stress and infections in its clinical expression. It is associated with other autoimmune disorders like diabetes mellitus, alopecia areata, Addison's disease, and thyroid disorders.

The course of the disease is unpredictable. If you notice any skin discoloration, reach out to a dermatologist for early diagnosis and treatment.

What You Can Safely Do Around Someone With Vitiligo

Bust the myths about vitiligo with proper information regarding the condition.

  • You can safely touch or hug someone with vitiligo
  • You can share food, drinks, or utensils.
  • Use the same towels, clothes, or bedding
  • Swim in the same pool
  • Live, work, or study in close quarters
  • There is zero risk of transmission.

By proper public awareness, the social stigma associated with the condition can be debunked. A qualified dermatologist can diagnose the condition with medical history, Wood's lamp examination, and blood tests to rule out other autoimmune diseases.

There is no cure for vitiligo, but treatment to restore pigmentation and to prevent progression of the disease can be done. Counseling and support groups to help patients with this disorder can make a meaningful difference.

(Dr. Saji Firoz, Consultant, Dermatology & Cosmetology, KIMSHEALTH, Thiruvananthapuram)

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Why Fentanyl Addiction Treatments Are Losing Effectiveness, Study Finds

Updated Jul 3, 2026 | 12:11 PM IST

SummaryCurrent doses of medications such as buprenorphine and methadone were originally developed to treat heroin and prescription opioid addiction. The study adds to growing calls from clinicians to update treatment guidelines to reflect today's illicit fentanyl market.
Why Fentanyl Addiction Treatments Are Losing Effectiveness, Study Finds

Credit: iStock

Fentanyl is an FDA-approved, quick-acting narcotic painkiller that is nearly 100 times more potent than morphine and 50 times stronger than heroin. While it has important medical uses, widespread illicit use has created a public health crisis, with researchers now warning that commonly used addiction treatments are struggling to keep pace.

A study by researchers at the University of California, Los Angeles, found that people who regularly use illicit fentanyl consume opioid doses equivalent to morphine levels hundreds of times higher than the fentanyl doses used in hospitals—far beyond what current addiction treatment protocols were designed to address.

Published in the journal Drug and Alcohol Dependence, the findings suggest these extreme exposure levels contribute to high opioid tolerance, making medications for opioid use disorder (MOUD) less effective and increasing overdose risk.

Although methadone and buprenorphine remain highly effective at reducing overdose deaths, many patients have struggled to start and remain on treatment since fentanyl replaced heroin as the dominant illicit opioid in the US because of the severity of fentanyl withdrawal, the team said.

Daily Intake Far Exceeds Treatment Protocols

The researchers estimated fentanyl exposure using morphine milligram equivalence (MME), a standardized measure that compares the potency of different opioids.

The analysis combined purity data from more than 500 fentanyl samples collected by Drug Checking Los Angeles between September 2023 and January 2026 with surveys of 47 people who regularly used fentanyl.

The researchers estimated that participants consumed an average of 8,887 MME per day.

According to the US Centers for Disease Control and Prevention (CDC), just 2 mg of fentanyl can be lethal for an opioid-naïve person. The study found that the average fentanyl user in Los Angeles consumes roughly 60 times that amount each day.

Tolerance develops not only to the drug's intoxicating effects but also to the respiratory depression that causes overdose, said Dr. Chelsea Shover, associate professor in the Department of Health Policy and Management.

"Now, we find that people are regularly exposed to doses of opioids that would have seemed impossible to me before I started this work," Shover said.

"To put it in perspective, in hospital settings, fentanyl is often dosed in 100-microgram vials. One gram of average-purity fentanyl that we tested had a dose equivalent to more than 1,200 of these vials. So people are getting daily doses that are on par with injecting hundreds of the hospital vials or taking 440 Percocet pills."

Why It Matters for Addiction Treatment

According to the researchers, the potency and variability of illicit fentanyl mean that people are consuming opioid doses far beyond what existing treatment protocols were designed to manage.

"Of course, starting MOUD is going to be harder for fentanyl than it is for heroin," Shover said.

"This study is a great example of where our science was directly informed by lived experience. It is a call to take withdrawal management seriously, with adjuvant therapies, and compassionate approaches."

As a fully synthetic drug, fentanyl is cheaper and easier to produce than heroin. Its high potency also increases the risk of unintentionally consuming dangerous amounts, raising the likelihood of overdose.

"It's no longer, 'how do we treat someone who smokes a gram of fentanyl per day,' it's 'how do we treat someone using thousands of MMEs of oral morphine in fentanyl per day?' That question and its answers feel more accessible, less abstract to clinicians," Shover said.

Standard Treatment Guidelines May Need Updating

The study reinforces concerns among addiction experts that standard treatment regimens for opioid addiction may no longer adequately address patients with extremely high fentanyl tolerance.

Current doses of medications such as buprenorphine and methadone were originally developed to treat heroin and prescription opioid addiction. The findings add to growing calls from clinicians to update treatment guidelines to reflect today's illicit fentanyl market.

"When patients say their withdrawal is not being treated well, it's important to listen," Shover said.

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