Robert F. Kennedy Jr, who oversees the health of more than 340 million Americans, says vitamin A can prevent the worst effects of measles rather than urging more people to get vaccinated.

In an opinion piece for Fox News, the US health secretary said he was “deeply concerned” about the current measles outbreak in Texas. However, he said the decision to vaccinate was a “personal one” and something for parents to discuss with their health-care provider.

Kennedy mentioned updated advice from the Centers for Disease Control (CDC) to treat measles with vitamin A. He also cited a study he said shows vitamin A can reduce the risk of dying from measles.

Here’s what the vitamin A study actually says and why public health officials are so concerned about Kennedy’s latest statement.

Why is a measles outbreak so worrying?

Measles is a highly contagious disease caused by a virus. It spreads easily including when an infected person breathes, coughs or sneezes.

Measles initially infects the respiratory tract and then the virus spreads throughout the body. Symptoms include a high fever, cough, red eyes, runny nose and a rash all over the body.

Measles can also be severe, can cause complications including blindness and swelling of the brain, and can be fatal. Measles can affect anyone but is most common in children.

The Texan health department has confirmed 150-plus cases of measles and one death of an unvaccinated child during the current outbreak. While this is by far the largest measles outbreak in the US in 2025, the CDC has reported smaller outbreaks in several other states so far this year.

Why vitamin A?

Vitamin A is essential for our overall health. It has many roles in the body, from supporting our growth and reproduction, to making sure we have healthy vision, skin and immune function.

Foods rich in vitamin A or related molecules include orange, yellow and red coloured fruits and vegetables, green leafy vegetables, as well as dairy, egg, fish and meat. You can take it as a supplement.

Vitamin A can also be used therapeutically. In other words, doctors may prescribe vitamin A to treat a deficiency. Vitamin A deficiency has long been associated with more severe cases of infectious disease, including measles. Vitamin A boosts immune cells and strengthens the respiratory tract lining, which is the body’s first defence against infections.

Because of this, the CDC has recently said vitamin A can also be prescribed as part of treatment for children with severe measles – such as those in hospital – under doctor supervision.

One key message from the CDC’s advice is that people are already sick enough with measles to be in hospital. They’re not taking vitamin A to prevent catching measles in the first place.

The other key message is vitamin A is taken under medical supervision, under specific circumstances, where patients can be closely monitored to prevent toxicity from high doses.

Vitamin A toxicity can cause birth defects and increase the risk of fractures in elderly people. Vitamin A and beta-carotene (which the body turns into vitamin A) from supplements may also increase your risk of cancer, especially if you smoke.

How about the study Kennedy cites?

Kennedy cites and links to a 2010 study, a type known as a systematic review and meta-analysis. Researchers reviewed and analysed existing studies, which included ones that looked at the effectiveness of vitamin A in preventing measles deaths.

They found three studies that looked at vitamin A treatment by specific dose. There were different doses depending on the age of the children, measured in IU (international units). Having two doses of vitamin A (200,000IU for children over one year of age or 100,000IU for infants below one year) reduced mortality by 62% compared to children who did not have vitamin A.

The 2010 study did not show vitamin A reduced your risk of getting measles from another infected person. To my knowledge no study has shown this.

To be fair, Kennedy did not say that vitamin A stops you from catching measles from another infected person. Instead, he used the following vague statement:

Studies have found that vitamin A can dramatically reduce measles mortality.

It’s easy to see how a reader could misinterpret this as “take vitamin A if you want to avoid dying from measles”.

We know what works – vaccines

The World Health Organization recommends all children receive two doses of measles vaccine.

The CDC states two doses of the measles vaccine (measles-mumps-rubella or MMR vaccine) is 97% effective against getting measles. This means out of every 100 people who are vaccinated only three will get it, and this will be a milder form.

But these facts were missing from Kennedy’s statement. Should we be surprised? Kennedy is well known for his vaccine sceptism and for undermining vaccination efforts, including for the measles vaccine.

As Sue Kressly, president of the American Academy of Pediatrics, told the Washington Post:

relying on vitamin A instead of the vaccine is not only dangerous and ineffective […] it puts children at serious risk.

Evangeline Mantzioris, Program Director of Nutrition and Food Sciences, Accredited Practising Dietitian, University of South Australia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

You’ve got a new brown spot on your face, but is it a freckle or a sunspot? Or perhaps you’ve found a spot on your back that looks like a mole but is flatter than your other ones – is it a mole or a dark freckle?

Here’s how to tell the difference between freckles, sunspots and moles – and when you need to get a spot checked to see if it’s skin cancer.

Freckles

Freckles, known as ephelides, are small, flat, light brown spots that appear on people with fair skin, or red or light-coloured hair.

These people are more likely to have the MC1R gene, which leads to freckles forming.

Freckles are caused by sun exposure and are more noticeable in summer. When sunlight hits the skin, cells called melanocytes produce melanin, the pigment that gives skin its colour.

In people prone to freckles, the melanin doesn’t spread evenly. Instead, it clumps together, creating freckles.

Freckles generally appear in childhood and may fade with age, especially if sun exposure reduces. As we age we produce less melanin, or it can break down or disperse, resulting in lighter or fewer freckles.

Using sunscreen and wearing protective clothing can help prevent new freckles from developing, especially on the face and arms.

While freckles are completely harmless, they are a sign that someone is genetically at higher risk of developing skin cancer.

Sunspots

Sunspots are also called age spots or solar lentigos (or liver spots, but they have nothing to do with the liver). They are larger than freckles: sometimes the size of a small coin, and appear as flat brown spots.

Sunspots develop over time due to long-term sun exposure, which leads to excessive melanin production. They tend to appear on skin with greater sun exposure, such as the face, hands, shoulders and arms.

Unlike freckles, which tend to get lighter with less sun exposure, sunspots will not fade with time, and may further darken with continued sun exposure.

However, some people try to remove their sunspots for cosmetic reasons using either a laser, chemical peel or a prescription topical cream.

While sunspots are not dangerous, they do increase your risk of other skin cancers in that area.

It’s also important to monitor them, as slow-growing melanomas may initially look like sunspots. If you see the spot changes in size, shape or colour, see your doctor to rule out skin cancer.

Moles

Moles are often dark, raised or flat skin growths that can appear anywhere on your body.

Although moles can exist from birth, they typically grow during childhood, adolescence and early adulthood (including during pregnancy, when hormones are changing), until around the age of around 40. Moles can increase in size, and new ones can also appear.

Most adults have between ten and 40 moles on their body. A person with a high mole count has 50 or more, while someone with a very high mole count has 100 or more.

Moles form when melanocytes grow in clusters instead of spreading evenly throughout the skin.

Moles can either be raised or flat, depending upon their type, depth and age.

Raised moles, referred to as compound nevi, have both flat and raised portions and typically have pigment that is deeper in the skin.

Dermal nevi are skin-coloured or light brown moles that are also raised.

Most moles are harmless. Some may have hair growing from them and some may disappear, whereas other moles may darken or alter with age or hormonal changes.

However, some moles can develop into melanoma, a dangerous form of skin cancer.

When to see your doctor

While freckles and sunspots are completely harmless, moles do require more attention, especially if they change in size, shape, colour or texture.

If a mole shows any of the following warning signs, see your doctor, who will use the ABCDE rule to detect if a lesion is a skin cancer:

• asymmetry: if one half of the mole looks different from the other half
• border: if your mole is shaped irregularly, jagged or has poorly defined edges
• colour: varied shades or sudden changes in colour of the mole
• diameter: if it is larger than 6 millimeters (about the size of a pencil eraser)
• evolving: if your mole has any changes in its size, shape, colour, or sensation such as itching or bleeding for more than a few weeks.

Our research shows only 21.7% of people can correctly identify melanoma on their own, so professional checks are essential.

How to prevent skin damage

Since freckles, sunspots and some moles are influenced by exposure to the sun, you can protect your skin by:

• avoiding the sun when ultraviolet rays are strongest
• wearing sunscreen with SPF 50 every day, even when it’s cloudy. Apply it 20 minutes before going outside and reapply every two hours
• wearing protective clothing, including a wide-brimmed hat to cover your face, neck and ears, and long-sleeved shirts and pants to protect your arms and legs.

Correction: this article originally referred to sun sports as actinic keratoses rather than solar lentigos.

Mike Climstein, Associate Professor, Faculty of Health, Southern Cross University; Jeremy Hudson, Adjunct Associate Professor, Faculty of Health, Southern Cross University; Michael Stapelberg, Adjunct Associate Professor, Faculty of Health, Southern Cross University, and Nedeljka Rosic, Senior Lecturer, Faculty of Health, Southern Cross University

This article is republished from The Conversation under a Creative Commons license. Read the original article.