Month: May 2022

A study asks whether people who eat a lot of fish have a higher risk for the skin cancer melanoma.

If you’re trying to stick to a healthy diet, fish is a good choice, right? After all, fish is high in protein, low in saturated fat, and a good source of omega-3 fatty acids, vitamin D, and many other nutrients. Eating more fish can mean eating less of foods with harmful fats and higher calorie counts. Indeed, nutritionists commonly recommend more seafood (and fewer cheeseburgers) to improve your diet, and nutrition guidelines promote fish as part of a healthy diet.

So, it seems surprising that a new study in Cancer Causes and Control suggests a link between eating fish and skin cancer, particularly since the biggest known risk factor for melanoma is not dietary ­–– it’s sun exposure. Having five or more sunburns in your life doubles your risk of developing melanoma.

A study links eating fish often with higher risk of melanoma

Melanoma, the most serious type of skin cancer, is responsible for more than 7,500 deaths in the US each year. And cases are on the rise.

In the new study, researchers found a higher risk of melanoma among people who ate the most fish. This study is among the largest and most well-designed to examine this link. Nearly 500,000 people in six US states completed a dietary questionnaire in 1995 or 1996. The average age of participants was 61 and 60% were male. More than 90% were white, 4% were Black, and 2% were Hispanic.

Over the following 15 years, the researchers tallied how many people developed melanoma, and found that:

• The rate of melanoma was 22% higher among people reporting eating the most fish (about 2.6 servings per week) compared with those who ate the least (0.2 servings a week, or about one serving every five weeks). Similar trends were noted for intake of tuna.
• The risk of precancerous skin changes (called melanoma in situ) rose similarly among those in the group that ate the most fish.
• Interestingly, researchers found no increased risk of melanoma among those eating the most fried fish. This is surprising because, if eating fish increases the risk of melanoma as the study suggests, it’s not clear why frying the fish would eliminate the risk.

Does this mean eating fish causes melanoma?

No, it doesn’t. It’s too soon to make definitive conclusions about the relationship between fish in our diets and melanoma. The study had important limitations, including

• Type of study. Observational studies like this one can detect a possible link between diet and cancer but cannot prove it.
• Reliance on self-reported survey data. People self-reported how many servings of fish they ate each week, which may not be accurate. Also, researchers assumed that fish consumption reported on the initial survey persisted for 15 years, which may not have been the case.
• Accounting for other factors. Many factors affect risk for melanoma, such as varied sun exposure depending on where participants lived. The analysis did account for some key factors, yet the study didn’t collect information about sun exposure, past sunburns, or use of sunscreen — all important in melanoma risk. Nor did researchers ask about skin type or number of moles; fair skin or higher numbers of moles raise risk for melanoma.
• Contaminants. Mercury or arsenic in fish may be to blame for its link to melanoma. This study did not record contaminants, but previous studies link mercury exposure with the risk of skin cancers, including melanoma.
• Lack of diversity. It’s not clear if the findings apply broadly to people in different racial and ethnic groups, because nine in 10 study participants were white.

Are some fish safer to eat than others?

The study did not explore this question. However, if contaminants like mercury in fish are responsible for increasing the risk of melanoma, the FDA offers advice on which fish are safer to eat, particularly for children and those who are pregnant or breastfeeding.

Yet even if fish is confirmed as a contributor to the risk of melanoma, other positive effects of fish consumption (such as cardiovascular benefit) may far outweigh this risk.

The bottom line

The researchers responsible for this study are not recommending a change in how much fish people eat. More study is required to confirm the findings, investigate which types of fish affect melanoma risk, and determine whether certain contaminants in fish are responsible for any added risk.

In the meantime, fish with lower mercury levels (such as salmon and clams) remain better dietary choices than the high-fat, highly processed foods typical of many Western diets.

If you’re planning to spend a lot of time outside this summer, limiting sun exposure and using sunscreen will likely have a bigger impact on skin health and your overall health than avoiding seafood.

About the Author

Robert H. Shmerling, MD, Senior Faculty Editor, Harvard Health Publishing

Dr. Robert H. Shmerling is the former clinical chief of the division of rheumatology at Beth Israel Deaconess Medical Center (BIDMC), and is a current member of the corresponding faculty in medicine at Harvard Medical School. … See Full Bio View all posts by Robert H. Shmerling, MD

Music boosts our mood and well-being, and music therapy may help during treatments for certain health conditions.

Times are hard. The current political climate, war, impact of global warming, continued inequities due to systemic racism, and ongoing physical and mental health challenges from COVID are taking a toll on our feelings of safety in the world and quality of life. Hopefully, each of us can find moments of ease and temporarily shift our thoughts away from the difficult daily news. For many people, music can play a role in making that shift, even incrementally.

How can music impact our quality of life?

Recently, researchers looked at the impact of music interventions on health-related quality of life, and tried to answer the question about the best way to help make that shift toward release, relaxation, and rehabilitation. This recent systematic review and meta-analysis (a study of studies) showed that the use of music interventions (listening to music, singing, and music therapy) can create significant improvements in mental health, and smaller improvements in physical health–related quality of life. While the researchers found a positive impact on the psychological quality of life, they found no one best intervention or “dose” of music that works best for all people.

Complexities of music

As complex human beings from a wide variety of cultures, with a variety of life experiences and mental and physical health needs, our connection with music is very personal. Our relationship with music can be a very beautiful, vulnerable, and often complicated dance that shifts from moment to moment based on our mood, preferences, social situation, and previous experiences. There are times where music can have a clear and immediate impact on our well-being:

• easing a transition to sleep with a soothing playlist
• finding motivation for exercise by listening to upbeat dance music
• aiding self-expression of emotions by singing
• connecting to others by attending a live musical performance.

There are other times when a board-certified music therapist can help you build that connection to music, and find the best intervention and “dose” that could positively impact your health and provide a form of healing.

How can music be used as a therapeutic tool?

Music therapy is an established health care profession that uses evidence-based music interventions to address therapeutic health care goals. Music therapy happens between a patient (and possibly their caregivers and/or family) and a board-certified music therapist who has completed an accredited undergraduate or graduate music therapy program.

Music therapists use both active (singing, instrument exploration, songwriting, movement, digital music creation, and more) and receptive (music listening, guided imagery with music, playlist creation, or music conversation and reminiscence) interventions, and create goals to improve health and well-being.

Some of those goals could include decreasing anxiety, shifting your mood, decreasing pain perception during cancer or other medical treatment, increasing expression, finding motivation, and many others. The approach to using music to achieve these kinds of goals — and to improving your quality of life in general — can shift from moment to moment, and a music therapist can help you find what works best for a particular situation.

My top music therapy tools

Listening

This intervention has been studied the most, in almost every scenario. It can be done either on your own or in music therapy. The music can be live or recorded. Listening can be done with intentional focus or as background listening. You can amplify emotions for release. You can use music to quiet the mind. Or you can utilize the “iso principle” and match music to your current energy or mood, and then slowly change feel, tempo, and complexity to help you shift. Music listening can be paired with prompts for relaxation, or to motivate you to exercise, move more, or do a task you’ve been putting off.

Learning or playing an Instrument

Active music-making truly engages your entire brain. This creates the most potential for distraction, pain reduction, cognition, fine and gross motor development, and expression. Some instruments are designed for easier access to free expression or learning.

A steel tongue drum, for example, set up in a pentatonic scale, has a beautiful resonant sound, has no “wrong notes,” and by design allows you to just play! If you want to engage your cognitive brain a bit, try learning the ukulele. The strings are easy to push, beginner chords only need one or two fingers, and there are many great ukulele resources online. Making music with an instrument can be fun and easy.

A board-certified music therapist can help you find the most direct and success-based path to musical expression. Learning how to really master an instrument and read music takes time, patience, and practice.

Singing

This can be an amazing intervention if you have a good connection to your voice and/or have a good music therapy relationship where the therapist can help you build your connection to your instrument. There are physical benefits of singing on lung function and emotional benefits of singing lyrics that speak your truth. Finally, there is the community connection and power of being surround by strong, tight harmonies.

The bottom line

Although there is not one best intervention, magical song, or perfect genre to make all the hard things in life easier, music can be a powerful agent of change.

Need some extra help finding the best music tools for you? Here are some resources for exploring music therapy and finding certified therapists.

American Music Therapy Association
Certified Board of Music Therapists
American Psychological Association: Music as Medicine

About the Author

Lorrie Kubicek, MT-BC, Contributor

Lorrie Kubicek is a board-certified music therapist at Massachusetts General Hospital, co-director of The Katherine A. Gallagher Integrative Therapies Program, and program manager of expressive therapies at MGH Cancer Center and Mass General Hospital for Children. … See Full Bio View all posts by Lorrie Kubicek, MT-BC