Debunking the vitamin D fad
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Throughout the pandemic, many unproven miracle COVID-19 “cures” emerged, and vitamin D claims have been one of the most persistent. This is not new for the vitamin. It’s been touted in recent decades as a way to “boost” the immune system, improve overall health, prevent a host of diseases, and allegedly even substitute for vaccines.
But as with many internet-popular health “remedies,” the reality is far less flashy and far more nuanced.
What is vitamin D, and why is it important?
Vitamin D is a nutrient that helps the body absorb calcium, which is essential for bone health. In the sunlight, your skin naturally produces vitamin D that is then stored in fat cells until it is used.
The skin pigment melanin absorbs the UV rays necessary for vitamin D production, meaning that more highly pigmented or darker skin produces less vitamin D than lighter skin with the same amount of sun exposure. Thus, people with darker skin are at higher risk of vitamin D deficiency.
Most of our vitamin D comes from the sun. An additional 10 percent to 20 percent of our vitamin D comes from foods like fatty fish (such as salmon), eggs, and mushrooms. Vitamin D supplements are another source of the nutrient for people who are unable to get enough from sun exposure and diet.
Vitamin D deficiency is real, but there’s no epidemic
Some people who promote vitamin D supplements claim that vitamin D deficiency is an epidemic causing widespread health issues. There is little evidence to support this claim. A 2022 analysis of 2001-2018 data found that 2.6 percent of people in the U.S. had severe vitamin D deficiency.
Severe vitamin D deficiency can cause serious health issues, such as muscle weakness, bone loss in adults, and rickets (weak bones) in children. Some people are at higher risk for the deficiency, including individuals with certain disorders that prevent the body from absorbing or processing vitamin D or those with a family history of vitamin D deficiency.
Black Americans have the highest rates of severe vitamin D deficiency at nearly 12 percent. Severe vitamin D deficiency is also slightly higher in the U.S. during the winter when people get less sun exposure. Rates of moderate vitamin D deficiency are higher at 22 percent overall and are highest among Black Americans (49 percent) and Mexican Americans (35 percent).
Although severe vitamin D deficiency exists in the U.S., it is far from common. Most tellingly, conditions that are directly linked to vitamin D deficiency are not widespread. There is no epidemic of rickets, for example, or bone loss in adults.
There’s little evidence that vitamin D supplements improve overall health
Vitamin D supplements have clear, proven positive effects for people with vitamin D deficiency. Other health benefits of vitamin D supplements are less certain.
There is some evidence that the supplement may reduce the risk of fracture in adults with osteoporosis, a condition that causes weak, fragile bones. However, the benefit appears to be limited to people who have low vitamin D levels. In adults with normal vitamin D levels, supplements have no effect on fracture risk.
The largest randomized controlled trial of vitamin D, called VITAL, investigated the effects of vitamin D supplementation in people without an existing deficiency. The study found that vitamin D supplements had no effects on the risk of cancer, diabetes, or cardiovascular disease, including heart attack and stroke. The study concluded that more research is necessary to determine who may benefit from vitamin D supplements.
Independent analyses found that vitamin D supplementation may be associated with a long-term decrease in cancer mortality, but results are mixed and also require more investigation.
A 2021 analysis of past vitamin D trials found no overall health benefits from vitamin D supplements in people with normal vitamin D levels. Most large-scale studies have found no link between vitamin D supplements and lower all-cause mortality (deaths from any cause), except in older adults and those with vitamin D deficiency.
Vitamin D provides modest protection against respiratory infections
Vitamin D is important for immune function, but this is often misconstrued as vitamin D “boosting” the immune system.
Some people falsely believe that taking vitamin D supplements will keep them healthy and prevent infections like the flu or COVID-19. In reality, clinical trials and large-scale studies of vitamin D have found only minimal protective effects against respiratory infections.
A 2021 analysis of 46 trials found that 61.3 percent of participants who took daily vitamin D supplements got respiratory infections during the study periods—compared to 62.3 percent of people who did not take the supplements. A 2024 meta-analysis of 43 trials found no overall protective effect against respiratory infections, but it detected a slight decrease in risk among people who took specific doses daily.
In young children, there is some evidence that vitamin D supplementation may reduce the length of respiratory infections. However, it does not affect the number or severity of infections that children have.
Despite claims that taking vitamin D can protect against COVID-19, two clinical trials found that taking daily vitamin D supplements did not reduce the risk or severity of COVID-19 infections, even at high doses.
Context is key when considering vitamin D’s benefits
None of these studies contradict the well-established evidence that people with vitamin D deficiency benefit from vitamin D supplements. But it’s important to remember that many of the most popular health claims about vitamin D’s benefits are based on research in people with vitamin D deficiency.
Research in vitamin D-deficient populations is important, but it tells us little about how vitamin D will affect people with normal or close to normal vitamin D levels. A closer look at vitamin D research in people without low levels reveals little evidence to support the idea that the general population benefits from taking vitamin D supplements.
For more information, or to learn about your vitamin D levels, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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Doctors Are as Vulnerable to Addiction as Anyone. California Grapples With a Response
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BEVERLY HILLS, Calif. — Ariella Morrow, an internal medicine doctor, gradually slid from healthy self-esteem and professional success into the depths of depression.
Beginning in 2015, she suffered a string of personal troubles, including a shattering family trauma, marital strife, and a major professional setback. At first, sheer grit and determination kept her going, but eventually she was unable to keep her troubles at bay and took refuge in heavy drinking. By late 2020, Morrow could barely get out of bed and didn’t shower or brush her teeth for weeks on end. She was up to two bottles of wine a day, alternating it with Scotch whisky.
Sitting in her well-appointed home on a recent autumn afternoon, adorned in a bright lavender dress, matching lipstick, and a large pearl necklace, Morrow traced the arc of her surrender to alcohol: “I’m not going to drink before 5 p.m. I’m not going to drink before 2. I’m not going to drink while the kids are home. And then, it was 10 o’clock, 9 o’clock, wake up and drink.”
As addiction and overdose deaths command headlines across the nation, the Medical Board of California, which licenses MDs, is developing a new program to treat and monitor doctors with alcohol and drug problems. But a fault line has appeared over whether those who join the new program without being ordered to by the board should be subject to public disclosure.
Patient advocates note that the medical board’s primary mission is “to protect healthcare consumers and prevent harm,” which they say trumps physician privacy.
The names of those required by the board to undergo treatment and monitoring under a disciplinary order are already made public. But addiction medicine professionals say that if the state wants troubled doctors to come forward without a board order, confidentiality is crucial.
Public disclosure would be “a powerful disincentive for anybody to get help” and would impede early intervention, which is key to avoiding impairment on the job that could harm patients, said Scott Hambleton, president of the Federation of State Physician Health Programs, whose core members help arrange care and monitoring of doctors for substance use disorders and mental health conditions as an alternative to discipline.
But consumer advocates argue that patients have a right to know if their doctor has an addiction. “Doctors are supposed to talk to their patients about all the risks and benefits of any treatment or procedure, yet the risk of an addicted doctor is expected to remain a secret?” Marian Hollingsworth, a volunteer advocate with the Patient Safety Action Network, told the medical board at a Nov. 14 hearing on the new program.
Doctors are as vulnerable to addiction as anyone else. People who work to help rehabilitate physicians say the rate of substance use disorders among them is at least as high as the rate for the general public, which the federal Substance Abuse and Mental Health Services Administration put at 17.3% in a Nov. 13 report.
Alcohol is a very common drug of choice among doctors, but their ready access to pain meds is also a particular risk.
“If you have an opioid use disorder and are working in an operating room with medications like fentanyl staring you down, it’s a challenge and can be a trigger,” said Chwen-Yuen Angie Chen, an addiction medicine doctor who chairs the Well-Being of Physicians and Physicians-in-Training Committee at Stanford Health Care. “It’s like someone with an alcohol use disorder working at a bar.”
From Pioneer to Lagger
California was once at the forefront of physician treatment and monitoring. In 1981, the medical board launched a program for the evaluation, treatment, and monitoring of physicians with mental illness or substance use problems. Participants were often required to take random drug tests, attend multiple group meetings a week, submit to work-site surveillance by colleagues, and stay in the program for at least five years. Doctors who voluntarily entered the program generally enjoyed confidentiality, but those ordered into it by the board as part of a disciplinary action were on the public record.
The program was terminated in 2008 after several audits found serious flaws. One such audit, conducted by Julianne D’Angelo Fellmeth, a consumer interest lawyer who was chosen as an outside monitor for the board, found that doctors in the program were often able to evade the random drug tests, attendance at mandatory group therapy sessions was not accurately tracked, and participants were not properly monitored at work sites.
Today, MDs who want help with addiction can seek private treatment on their own or in many cases are referred by hospitals and other health care employers to third parties that organize treatment and surveillance. The medical board can order a doctor on probation to get treatment.
In contrast, the California licensing boards of eight other health-related professions, including osteopathic physicians, registered nurses, dentists, and pharmacists, have treatment and monitoring programs administered under one master contract by a publicly traded company called Maximus Inc. California paid Maximus about $1.6 million last fiscal year to administer those programs.
When and if the final medical board regulations are adopted, the next step would be for the board to open bidding to find a program administrator.
Fall From Grace
Morrow’s troubles started long after the original California program had been shut down.
The daughter of a prominent cosmetic surgeon, Morrow grew up in Palm Springs in circumstances she describes as “beyond privileged.” Her father, David Morrow, later became her most trusted mentor.
But her charmed life began to fall apart in 2015, when her father and mother, Linda Morrow, were indicted on federal insurance fraud charges in a well-publicized case. In 2017, the couple fled to Israel in an attempt to escape criminal prosecution, but later they were both arrested and returned to the United States to face prison sentences.
The legal woes of Morrow’s parents, later compounded by marital problems related to the failure of her husband’s business, took a heavy toll on Morrow. She was in her early 30s when the trouble with her parents started, and she was working 16-hour days to build a private medical practice, with two small children at home. By the end of 2019, she was severely depressed and turning increasingly to alcohol. Then, the loss of her admitting privileges at a large Los Angeles hospital due to inadequate medical record-keeping shattered what remained of her self-confidence.
Morrow, reflecting on her experience, said the very strengths that propel doctors through medical school and keep them going in their careers can foster a sense of denial. “We are so strong that our strength is our greatest threat. Our power is our powerlessness,” she said. Morrow ignored all the flashing yellow lights and even the red light beyond which serious trouble lay: “I blew through all of it, and I fell off the cliff.”
By late 2020, no longer working, bedridden by depression, and drinking to excess, she realized she could no longer will her way through: “I finally said to my husband, ‘I need help.’ He said, ‘I know you do.’”
Ultimately, she packed herself off to a private residential treatment center in Texas. Now sober for 21 months, Morrow said the privacy of the addiction treatment she chose was invaluable because it shielded her from professional scrutiny.
“I didn’t have to feel naked and judged,” she said.
Morrow said her privacy concerns would make her reluctant to join a state program like the one being considered by the medical board.
Physician Privacy vs. Patient Protection
The proposed regulations would spare doctors in the program who were not under board discipline from public disclosure as long as they stayed sober and complied with all the requirements, generally including random drug tests, attendance at group sessions, and work-site monitoring. If the program put a restriction on a doctor’s medical license, it would be posted on the medical board’s website, but without mentioning the doctor’s participation in the program.
Yet even that might compromise a doctor’s career since “having a restricted license for unspecified reasons could have many enduring personal and professional implications, none positive,” said Tracy Zemansky, a clinical psychologist and president of the Southern California division of Pacific Assistance Group, which provides support and monitoring for physicians.
Zemansky and others say doctors, just like anyone else, are entitled to medical privacy under federal law, as long as they haven’t caused harm.
Many who work in addiction medicine also criticized the proposed new program for not including mental health problems, which often go hand in hand with addiction and are covered by physician health programs in other states.
“To forgo mental health treatment, I think, is a grave mistake,” Morrow said. For her, depression and alcoholism were inseparable, and the residential program she attended treated her for both.
Another point of contention is money. Under the current proposal, doctors would bear all the costs of the program.
The initial clinical evaluation, plus the regular random drug tests, group sessions, and monitoring at their work sites could cost participants over $27,000 a year on average, according to estimates posted by the medical board. And if they were required to go for 30-day inpatient treatment, that would add an additional $40,000 — plus nearly $36,000 in lost wages.
People who work in the field of addiction medicine believe that is an unfair burden. They note that most programs for physicians in other states have outside funding to reduce the cost to participants.
“The cost should not be fully borne by the doctors, because there are many other people that are benefiting from this, including the board, malpractice insurers, hospitals, the medical association,” said Greg Skipper, a semi-retired addiction medicine doctor who ran Alabama’s state physician health program for 12 years. In Alabama, he said, those institutions contribute to the program, significantly cutting the amount doctors have to pay.
The treatment program that Morrow attended in spring of 2021, at The Menninger Clinic in Houston, cost $80,000 for a six-week stay, which was covered by a concerned family member. “It saved my life,” she said.
Though Morrow had difficulty maintaining her sobriety in the first year after treatment, she has now been sober since April 2, 2022. These days, Morrow regularly attends therapy and Alcoholics Anonymous and has pivoted to become an addiction medicine doctor.
“I am a better doctor today because of my experience — no question,” Morrow said. “I am proud to be a doctor who’s an alcoholic in recovery.”
This article was produced by KFF Health News, which publishes California Healthline, an editorially independent service of the California Health Care Foundation.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
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How To Recognize Perfectly Hidden Depression
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Dr. Margaret Rutherford shares her insights from 30 years of professional experience:
There’s only one way to know
In this video, Dr. Rutherford discusses several (presumably pseudonymized) cases of people who came to her therapy office seeming to have their lives very much together when they very much didn’t, including the woman who came in with symptoms of mild anxiety, and then tried to kill herself, and the man who was outwardly an overachiever while consumed with feelings of guilt and shame.
She discusses how even the most skilled mental health professionals will tend to miss hidden depression, as they focus on visible symptoms from the DSM criteria, which may not reflect the patient’s reality, especially for those hiding their struggles.
So, the crux becomes: why do people hide their struggles? One does not go to the emergency room with a broken limb and then say to the doctor “I’m fine thank you; how are you?” so why do people do that when it comes to mental health issues?
The reality is that the shame of revealing feelings like shame itself, fear, and self-loathing keeps people silent, and in particular, research (Schneiderman et al.) shows that emotional pain plays a central role in suicide, and (per Blatt et al.) perfectionism can drastically alter the presentation of depression, making it even harder to diagnose through standard criteria than it already was.
As for what can be done about it? Dr. Rutherford advocates for a cultural shift where talking about emotional pain, including suicidal thoughts, is seen as normal and not shameful. That people need to feel safe expressing these feelings, to prevent tragic outcomes. Instead of judging or dismissing someone with suicidal thoughts, she encourages a compassionate and accepting approach to open up dialogue and understanding.
In short, that everyone can contribute to a culture that views transparency and vulnerability as strengths, helping reduce the stigma around mental health struggles.
And that’s the only way we’ll ever be able to recognize perfectly hidden depression—if people no longer feel that they have to hide it.
For more on all of this, here’s Dr. Rutherford herself:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- The Mental Health First Aid (That You’ll Hopefully Never Need) ← This is about managing depression, in yourself or others
- How To Stay Alive (When You Really Don’t Want To) ← This is about managing suicidality, in yourself or others
Take care!
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This Book May Save Your Life – by Dr. Karan Rajan
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The title is a bold sell, but the book does include a lot of information about what can go wrong in your body, and how those things can be avoided.
What it’s not: a reiteration of Dr. Michael Greger’s “How Not To Die“. It’s not dense medical information, and it doesn’t cite papers at a rate of ten per page.
What it is: an easy-reading tour guide of the human body and its many quirks and foibles, and how we can leverage those to our benefit. On which note…
Hopefully, your insides will never see the light of day, but this author is a general surgeon and as such, is an experienced and well-qualified tour guide. Here, we learn about everything from the long and interesting journey through our gut, to the unique anatomical features and liabilities of the brain. From the bizarre oddities of the genitals, to things most people don’t know about the process of death.
The style of the book is very casual, with lots of short sections (almost mini chapters-within-chapters, really) making for very light reading—and certainly enjoyable reading too, unless you are inclined to squeamishness.
Bottom line: in honesty, the book is more informative than it is instructional, though it does contain the promised health tips too. With that in mind, it’s a very enjoyable and educational read, and we do recommend it.
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Meningitis Outbreak
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Don’t Let Your Guard Down
In the US, meningitis is currently enjoying a 10-year high, with its highest levels of infection since 2014.
This is a big deal, given the 10–15% fatality rate of meningitis, even with appropriate medical treatment.
But of course, not everyone gets appropriate medical treatment, especially because symptoms can become life-threatening in a matter of hours.
Most recent stats gave an 18% fatality rate for the cases with known outcomes in the last year:
CDC Emergency | Increase in Invasive Serogroup Y Meningococcal Disease in the United States
The quick facts:
❝Meningococcal disease most often presents as meningitis, with symptoms that may include fever, headache, stiff neck, nausea, vomiting, photophobia, or altered mental status.
[It can also present] as meningococcal bloodstream infection, with symptoms that may include fever and chills, fatigue, vomiting, cold hands and feet, severe aches and pains, rapid breathing, diarrhea, or, in later stages, a dark purple rash.
While initial symptoms of meningococcal disease can at first be non-specific, they worsen rapidly, and the disease can become life-threatening within hours. Immediate antibiotic treatment for meningococcal disease is critical.
Survivors may experience long-term effects such as deafness or amputations of the extremities.❞
~ Ibid.
The good news (but still don’t let your guard down)
Meningococcal bacteria are, happily, not spread as easily as cold and flu viruses.
The greatest risks come from:
- Close and enduring proximity (e.g. living together)
- Oral, or close-to-oral, contact (e.g. kissing, or coughing nearby)
Read more:
CDC | Meningococcal Disease: Causes & How It Spreads
Is there a vaccine?
There is, but it’s usually only offered to those most at risk, which is usually:
- Children
- Immunocompromised people, especially if HIV+
- People taking certain medications (e.g. Solaris or Ultomiris)
Read more:
CDC | Meningococcal Vaccine Recommendations
Will taking immune-boosting supplements help?
Honestly, probably not, but they won’t harm either. The most important thing is: don’t rely on them—too many people pop a vitamin C supplement and then assume they are immune to everything, and it doesn’t work like that.
On a tangential note, for more general immune health, you might also want to check out:
Beyond Supplements: The Real Immune-Boosters!
The short version:
If you or someone you know experiences the above-mentioned symptoms, even if it does not seem too bad, get thee/them to a doctor, and quickly, because the (very short) clock may be ticking already.
Better safe than sorry.
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Pear vs Peach – Which is Healthier?
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Our Verdict
When comparing pears to peaches, we picked the peaches.
Why?
Both are great! But peaches are exceptional in some ways that pears just can’t match up to:
In terms of macros, pears have more carbs and fiber, the ratio of which results in an approximately equal glycemic index. Thus, we’ll say that pears win this round by virtue of being the nutritionally denser option.
Looking at the vitamins, pears have (slightly) more of vitamins B6, B9, and K, while peaches have (much) more of vitamins A, B1, B2, B3, B5, B7, C, E, and choline—thus sweeping this category easily for peaches.
In the category of minerals, pears have more calcium and copper, while peaches have more iron, magnesium, manganese, phosphorus, potassium, and zinc. This time, the margins of difference for each mineral are comparably low (i.e. pears are close behind peaches on all those minerals), but still, by strength of numbers, it’s a clear win for peaches.
When it comes to polyphenols, not only do peaches have more, but also, they have anticancer properties that pears don’t—see our link below for more about that!
Meanwhile, adding up the sections makes for an overall win for peaches, but as ever when it comes to fruits, by all means enjoy either or both; diversity is good!
Want to learn more?
You might like to read:
Top 8 Fruits That Prevent & Kill Cancer ← peaches in the #2 spot! They induce cell death in cancer cells while sparing healthy ones
Enjoy!
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Gut Feelings – by Dr Will Cole
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More and more, science is uncovering links between our gut health and the rest of our health—including our mental health! We all know “get some fiber and consider probiotics”, but what else is there that we can do?
Quite a lot, actually. And part of it, which Dr. Cole also explores, is the fact that the gut-brain highway is a two-way street!
The book looks a lot especially at the particular relationship between shame and eating. The shame need not initially be about eating, though it can certainly end up that way too. But any kind of shame—be it relating to one’s body, work, relationship, or anything else, can not only have a direct effect on the gut, but indirect too:
Once our “eating our feelings” instinct kicks in, things can spiral from there, after all.
So, Dr. Cole walks us through tackling this from both sides—nutrition and psychology. With chapters full of tips and tricks, plus a 21-day plan (not a diet plan, a habit integration plan), this book hits shame (and inflammation, incidentally) hard and leads us into much healthier habits and cycles.
In short: if you’d like to have a better relationship with your food, improve your gut health, and/or reduce inflammation, this is definitely a book for you!
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