Month: April 2022

Many health-conscious consumers have already cut back on hamburgers, steaks, and deli meats, often by swapping in poultry or seafood. Those protein sources are better than beef, and not just because they’re linked to a lower risk of heart disease, diabetes, and cancer. Chicken and fish are also better for the environment, as their production uses less land and other resources and generates fewer greenhouse gas emissions.

And choosing seafood that’s lower on the food chain — namely, small fish such as herring and sardines and bivalves such as clams and oysters — can amp up those benefits. “It’s much better for your health and the environment when you replace terrestrial food sources — especially red meat — with aquatic food sources,” says Christopher Golden, assistant professor of nutrition and planetary health at the Harvard T.H. Chan School of Public Health. But instead of popular seafood choices such as farmed salmon or canned tuna, consider mackerel or sardines, he suggests.

Why eat small fish?

Anchovies, herring, mackerel, and sardines are all excellent sources of protein, micronutrients like iron, zinc, and vitamin B12, and heart-healthy omega-3 fatty acids, which may help ease inflammation within the body and promote a better balance of blood lipids. And because you often eat the entire fish (including the tiny bones), small fish are also rich in calcium and vitamin D, says Golden. (Mackerel is an exception: cooked mackerel bones are too sharp or tough to eat, although canned mackerel bones are fine to eat).

Small fish are also less likely to contain contaminants such as mercury and polychlorinated biphenyls (PCBs) compared with large species like tuna and swordfish. Those and other large fish feed on smaller fish, which concentrates the toxins.

It’s also more environmentally friendly to eat small fish directly instead of using them to make fish meal, which is often fed to farmed salmon, pork, and poultry. Feed for those animals also includes grains that require land, water, pesticides, and energy to produce, just as grain fed to cattle does, Golden points out. The good news is that increasingly, salmon farming has begun using less fish meal, and some companies have created highly nutritious feeds that don’t require fish meal at all.

Small fish in the Mediterranean diet

The traditional Mediterranean diet, widely considered the best diet for heart health, highlights small fish such as fresh sardines and anchovies, says Golden. Canned versions of these species, which are widely available and less expensive than fresh, are a good option. However, most canned anchovies are salt-cured and therefore high in sodium, which can raise blood pressure.

Sardines packed in water or olive oil can be

• served on crackers or crusty, toasted bread with a squeeze of lemon
• prepared like tuna salad for a sandwich filling
• added to a Greek salad
• tossed with pasta, either added to tomato sauce or with lemon, capers, and red pepper flakes.

Golden is particularly fond of pickled herring, which you can often find in jars in supermarkets, or even make yourself; here’s his favorite recipe.

Bivalve benefits

Bivalves are two-shelled aquatic creatures that include clams, oysters, mussels, and scallops. Also known as mollusks, they’re good sources of protein but are quite low in fat, so they aren’t as rich in omega-3’s as small, fatty fish. However, bivalves contain several micronutrients, especially zinc and vitamin B12. Zinc contributes to a healthy immune system, and vitamin B12 helps form red blood cells that carry oxygen and keep nerves throughout the body healthy. While most Americans get enough B12, some may not.

And from a planetary health perspective, bivalves are among the best sources of animal-based protein. “Bivalves can be ‘nature positive’ because they don’t require feed and they filter and clean up water,” says Golden.

Be aware, however, that bivalves can become contaminated from runoff, bacteria, viruses, or chemicals in the water. So be sure to follow FDA advice about buying and preparing seafood safely.

Although we tend to think of coastal cities as the best places to find seafood, it’s available throughout the United States. For less-common varieties, try larger Asian markets, which often carry a wide variety of fish and bivalves, Golden suggests.

Aquatic plant foods

You can even go one step further down the aquatic food chain by eating aquatic plant foods such as seaweed and kelp. If you like sushi, you’ve probably had nori, the flat sheets of seaweed used to make sushi rolls. You can also find seaweed snacks in Asian and many mainstream grocery stores. The truly adventurous may want to try kelp jerky or a kelp burger, both sold online.

Nutrients in seaweed vary quite a bit, depending on species (kelp is one type of brown seaweed; there are also numerous green and red species). But seaweed is low in calories, is a good source of fiber, and also contains iodine, a mineral required to make thyroid hormones. Similar to terrestrial vegetables, seaweeds contain a range of other minerals and vitamins. For now, aquatic plant foods remain fringe products here in the United States, but they may become more mainstream in the future, according to Golden.

About the Author

Julie Corliss, Executive Editor, Harvard Heart Letter

Julie Corliss is the executive editor of the Harvard Heart Letter. Before working at Harvard, she was a medical writer and editor at HealthNews, a consumer newsletter affiliated with The New England Journal of Medicine. She … See Full Bio View all posts by Julie Corliss

About the Reviewer

Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Howard LeWine, M.D., is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

Proton-pump inhibitors (PPIs) are a common type of anti-acid medication, and are available both by prescription and over the counter. Omeprazole and pantoprazole are examples of PPIs. They are the treatment of choice for several gastrointestinal disorders, such as peptic ulcer disease, esophagitis, gastroesophageal reflux disease, and H. pylori infection.

New guidelines by the American Gastroenterological Association have highlighted the need to address appropriate PPI usage, and they recommend that PPIs should be taken at the lowest dose and shortest duration for the condition being treated. However, PPIs are frequently overused, and may be taken for longer than necessary. This can happen unintentionally; for example, if the medication was started while the patient was hospitalized, or it was started as a trial to see if a patient’s symptoms would improve and then is continued beyond the needed timeframe.

Who should use PPIs in the short term?

There are a variety of reasons for short-term PPI usage. For instance, PPIs are prescribed typically for one to two weeks to treat H. pylori infection, in addition to antibiotics. A PPI course of four to 12 weeks may be prescribed for people with ulcers in their stomach or small intestine, or for inflammation in the esophagus.

People may also be prescribed a short course of PPIs for acid reflux or abdominal pain symptoms (dyspepsia), and for symptom relief while physicians perform tests to determine the cause of abdominal pain. People may be able to move to a lower dose of PPIs, or discontinue their medication altogether, if their symptoms get better or they have completed their treatment course.

Who should be on PPIs long-term?

Some patients with specific conditions may need to be on PPIs for the long term, and they should discuss their condition and unique treatment plan with their doctor. Some conditions that may require longer-term use of PPIs include:

• severe esophagitis, eosinophilic esophagitis, Barrett’s esophagus, esophageal strictures, or idiopathic pulmonary fibrosis
• acid reflux
• dyspepsia or upper airway symptoms that improve with PPI usage but worsen when stopping PPIs
• people with a history of upper gastrointestinal bleeding from gastric and duodenal peptic ulcers may need to be on PPIs long-term to prevent recurrence.

What are some side effects of PPIs?

Any medication can cause side effects. Fortunately, adverse effects from PPIs are generally rare. However, these medications have been associated with increased risk of certain infections (such as pneumonia and C. difficile). Previously, there had been concerns that PPI usage was linked to dementia, but newer studies have contradicted this association.

Additionally, while rare, PPIs may also cause drug interactions with other medications. For example, PPIs may affect the levels and potency of certain medications, such as clopidogrel (Plavix), warfarin (Coumadin), and some seizure and HIV medications, sometimes necessitating dosage adjustments of these drugs. Therefore, it is important to let the team of healthcare providers who manage your medications know when a new medication has been added to your list or if a medication has been discontinued.

How do I work with my doctor to step down from taking PPIs?

Some patients are prescribed PPIs twice a day in an acute situation, such as to prevent rebleeding from stomach ulcers or if a patient has severe acid reflux symptoms. If there no longer remains a reason to take PPIs twice a day, you may be stepped down to once a day. To discontinue a PPI, your doctor may decide to taper the medication — for example, by decreasing the dose by 50% each week until discontinued.

What might I experience if my doctor suggests I stop taking a PPI?

Studies have shown that for patients with long-term PPI use, there can be rebound secretion of stomach acid and an increase in upper gastrointestinal symptoms when discontinuing PPIs. However, a different type of anti-acid medication (such as an H2 antagonist like famotidine or a contact antacid medication containing calcium carbonate like TUMS) can be used for relief temporarily. If a patient experiences more than two months of severe persistent symptoms after discontinuing a PPI, this may be a reason to resume PPI therapy.

What steps should I take next?

It is important to routinely discuss your medication list and concerns with your primary care doctor. The decision to step down or discontinue a PPI is complex, and for your safety you should verify with your doctor before adjusting your PPI dosing. Ultimately, the goal is to make sure you are only taking medications that are necessary in order to maximize the benefit and minimize side effects.

About the Authors

Nisa Desai, MD, Contributor

Dr. Nisa Desai is a practicing hospitalist physician at Beth Israel Deaconess Medical Center, and an instructor in medicine at Harvard Medical School. She completed undergraduate education at Northwestern University, followed by medical school at the … See Full Bio View all posts by Nisa Desai, MD

Loren Rabinowitz, MD, Contributor

Dr. Loren Rabinowitz is an instructor in medicine Beth Israel Deaconess Medical Center and Harvard Medical School, and an attending physician in the Inflammatory Bowel Disease Center at BIDMC. Her clinical research is focused on the … See Full Bio View all posts by Loren Rabinowitz, MD

Many people know the form of dementia called Alzheimer’s disease. But what is frontotemporal dementia (FTD)? Damage to nerves in certain parts of the brain causes a group of frontotemporal disorders, affecting behavior and language as I’ll describe below.

Early signs of frontotemporal dementia

Have you noticed someone behaving differently? Is your coworker doing odd things, such as slapping each door as they walk down the hall? Or has your previously kind and caring spouse lost their capacity for empathy, such that when you told them about your cancer diagnosis, they complained that your treatment schedule would interfere with their golf game? If so, they might be showing early signs of the behavioral variant of FTD.

Maybe there’s a problem with language, rather than behavior. Perhaps it started with difficulty finding words (like any older adult), but is your sibling now having trouble with grammar and getting out an intelligible sentence? Or does your friend not know the meaning of some ordinary words, like pizza, lemonade, wood, or metal? If so, they might be showing signs of primary progressive aphasia, which may also be due to FTD.

A common pathology inside the brain

What’s the connection between these behavior and language problems? Why are they both part of FTD?

Both have the same underlying causes: a family of abnormal proteins that can be seen under the microscope. In fact, more than a dozen different pathologies can cause FTD. Each of them can lead to either behavioral variant frontotemporal dementia or the language difficulties of primary progressive aphasia.

Location, location, location

How can the same pathology — the same abnormal protein — lead to either behavior problems or language problems, or sometimes both? The answer is, it depends on where the pathology is.

The frontal lobes of your brain, behind your forehead, regulate and guide your personality, judgement, and behavior. So, if the frontotemporal pathology is in this region, it will cause changes in personality, judgement, and behavior.

The left temporal lobe (near your left ear and temple) and a part of the left frontal lobe just above it are the critical brain regions for language. When these areas are affected by frontotemporal pathology, language problems develop.

How does frontotemporal dementia compare with Alzheimer’s disease?

Frontotemporal dementia affects people in middle age, usually between ages 45 and 65, although one-quarter of individuals are diagnosed after age 65. Alzheimer’s usually affects people over 65.

In terms of symptoms, people with frontotemporal dementia experience either language or behavior problems, whereas people with Alzheimer’s disease — the most common cause of dementia — usually have memory problems.

Because more than 12 different abnormal proteins can cause frontotemporal dementia, it has a very variable time course. From the time of diagnosis, people with frontotemporal dementia need nursing home–level care in two to 20 years. The typical range with Alzheimer’s disease is four to 12 years.

Who is at risk for FTD?

Up to 40% of cases of frontotemporal dementia run in families, but that means at least 60% of cases do not. Unfortunately, everyone is at risk for frontotemporal dementia as they approach middle age.

What are common signs of the behavioral variant?

There are six common signs of behavioral variant frontotemporal dementia, and most people with the disorder have at least three of them. They are:

• loss of self-control
• apathy or inertia (not wanting to do anything)
• loss of sympathy or empathy
• repetitive or compulsive, ritualistic behavior
• uncontrolled or unusual eating
• difficulty doing complicated tasks.

One individual I cared for with this disorder would walk up to strangers, stand closer than would be comfortable, and say loudly, “You’re handsome!” Another would eat almost anything left out in the kitchen. One woman I treated with this disorder tried to pick up men from a restaurant — while her husband was sitting at the next table. A previously kind and shy grandfather with frontotemporal dementia began to ask his daughter-in-law for sexual favors.

What are common signs of the language variants?

Two variants of primary progressive aphasia are part of the frontotemporal dementia family of diseases. Common signs are:

• difficulty getting words and sentences out, although the meaning of words is preserved (nonfluent or agrammatic variant). People become frustrated because they know what they want to say but find it difficult or impossible to do so.
• losing the meaning of words (semantic variant). I had one patient who did not know the meaning of the words shoe, pants, foot, knee, elbow, and many other words related to clothing and parts of the body.

Can frontotemporal dementia be treated?

Currently, there is no cure or way to slow these disorders down, so treatment is supportive. SSRI medications (selective serotonin reuptake inhibitors) can help with some disinhibited behaviors.

Speech therapy can be helpful, at least initially, with primary progressive aphasia, but thus far no medications are effective.

What can I do if I suspect that someone has frontotemporal dementia?

FTD is difficult to diagnose. Because it affects people in middle age, dementia is usually not suspected. Early in the disease, people are often thought to be having a midlife crisis, depression, or perhaps a drug or alcohol problem. Many marriages end prior to the diagnosis because the spouse with the disorder has grown self-absorbed and inconsiderate over several years.

If you do suspect the disorder, start by simply asking the person if there is anything that you can help with. You may find out that it is another problem entirely. But if it is becoming clear that this or another form of dementia may be involved, encourage them and their family to discuss this possibility with their doctor.

About the Author

Andrew E. Budson, MD,

Contributor; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Andrew E. Budson is chief of cognitive & behavioral neurology at the Veterans Affairs Boston Healthcare System, lecturer in neurology at Harvard Medical School, and chair of the Science of Learning Innovation Group at the … See Full Bio View all posts by Andrew E. Budson, MD

The transgender population is steadily increasing. Last year, investigators reported that 1.3% of people between the ages of 18 and 24 in the United States identify as transgender, compared to 0.55% of the country's older adults. This trend has implications for public health, and one issue in particular concerns the risk of prostate cancer in transgender women.

Because removing the prostate can lead to urinary incontinence and other complications, doctors leave the gland in place when initiating hormonal treatments to induce female sex characteristics in transitioning people. This process, which is called feminizing or gender-affirming hormonal therapy (GAHT), relies on medications and surgery to block testosterone, a male sex hormone. Prostate cancer is fueled by testosterone, and therefore GAHT lowers overall risks for the disease. But transgender women can still develop prostate cancer in ways that remain poorly understood, according to the authors of a new paper.

"More individuals are openly identifying as transgender, particularly as advances are made in reducing the discrimination and marginalization that this group has faced," says Dr. Farnoosh Nik-Ahd, a urologist at the University of California, San Francisco, and the paper's first author. "Thus, it's important to understand their health outcomes and how best to care for this population."

Dr. Nik-Ahd and her colleagues wanted better insights into prostate cancer incidence and screening rates among transgender women, so they performed a comprehensive review of the literature that generated some notable findings. One is that that the prevalence of GAHT in the transgender population is still unknown. Some studies put the figure at roughly one in every 12,000 to 13,000 people who identify as transgender. But this is likely an underestimate, the authors claim, and it's not broken out by sex.

Questions over GAHT

Similarly, little is known about the impact of GAHT on the likelihood of developing prostate cancer, the team reported. Prostate cancer rates do appear to be lower among transgender women than they are among cisgender men (men whose gender identify matches their sex at birth). For instance, one study found just a single case of prostate cancer among 2,306 transgender women receiving routine health care at a clinic in Amsterdam, Holland, between 1975 and 2006. Another study, also from Holland, detected six cases of prostate cancer among 2,281 transgender women over 17 years, which again is less than the comparable rate among cisgender men.

But the interpretation of these rates is limited by the fact that transgender women often experience barriers to care. Nearly a third of them live in poverty, and many avoid the health system for fear of mistreatment. Some scientists suspect that estrogen given during GAHT may somehow contribute to prostate cancer development when given over long durations. However, more confirmatory evidence is needed. Worryingly, one study found that survival among transgender women with prostate cancer is worse than it is in cisgender men with the disease, yet that research lacked data on GAHT use.

Interpreting PSA values for specific populations

Dr. Nik-Ahd's team was especially concerned about the lack of guideline recommendations for prostate-specific antigen (PSA) screening in the transgender population. None of the available guidelines worldwide mention transgender women, and the PSA cutoff of 4 nanograms per milliliter (ng/mL) of blood — which raises suspicions for prostate cancer — is specific to cisgender men. PSA levels ordinarily plummet in people taking GAHT, so the limit for what's considered normal in transgender women should be capped at 1.0 ng/mL, the researchers propose. In the absence of more specific guidance, they also recommend that people meeting age criteria for PSA screening get tested before starting on GAHT, in order to obtain a baseline value.

Many doctors are already familiar with other common drugs that alter PSA values — in this case with screening implications for cisgender men, points out Dr. Heidi Rayala, a urologist affiliated with Beth Israel Deaconess Medical Center in Boston, and a member of the Harvard Medical School Annual Report on Prostate Diseases editorial board. For instance, PSA values drop by half in men taking finasteride or dutasteride for hair loss (or to shrink an enlarged prostate). "Doctors take extra care when interpreting PSA in cisgender men who take these drugs," she says. "The same care needs to be taken in interpreting PSA values in transgender women. And there needs to be broader education on this topic for both primary care doctors as well as the transgender community.

Dr. Nik-Ahd agrees. "Future research should aim to understand baseline PSA values for those on gender-affirming hormones, and to understand how to navigate some of the psychosocial barriers around PSA screening so as to not stigmatize transgender patients," she says.

About the Author

Charlie Schmidt, Editor, Harvard Medical School Annual Report on Prostate Diseases

Charlie Schmidt is an award-winning freelance science writer based in Portland, Maine. In addition to writing for Harvard Health Publishing, Charlie has written for Science magazine, the Journal of the National Cancer Institute, Environmental Health Perspectives, … See Full Bio View all posts by Charlie Schmidt

About the Reviewer

Marc B. Garnick, MD, Editor in Chief, Harvard Medical School Annual Report on Prostate Diseases; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Marc B. Garnick is an internationally renowned expert in medical oncology and urologic cancer. A clinical professor of medicine at Harvard Medical School, he also maintains an active clinical practice at Beth Israel Deaconess Medical … See Full Bio View all posts by Marc B. Garnick, MD

Parents like to think that they know what is going on with their children — and that they would know if their teen was suicidal. However, research shows that this is not always the case.

Teens may consider suicide more often than parents realize

In a study published a few years ago in the journal Pediatrics, researchers interviewed more than 5,000 adolescents ages 11 to 17. In those interviews, they asked them if they had ever thought about killing themselves — or if they had ever thought a lot about death or dying. The teens' parents were asked if they believed that their teens had ever thought about killing themselves, or had thought a lot about death or dying.

There wasn’t a whole lot of match-up. Half of the parents of the adolescents who thought of killing themselves were unaware — as were three-quarters of the parents of adolescents who thought often about death.

This disconnect looms larger as research shows mental health problems are on the rise in youth. According to the 2021 Youth Risk Behavioral Survey, 42% of high school students reported persistent feelings of sadness and hopelessness; 22% seriously considered suicide, and 10% attempted it.

The numbers were higher for girls and youth who identify as LGBTQ+:

• Almost 60% of girls experienced persistent sadness and hopelessness; 30% seriously considered attempting suicide, and 13% attempted it.
• Among LGBTQ+ youth, 70% experienced persistent sadness and hopelessness; 45% seriously considered attempting suicide, and 22% attempted it.

Many factors contribute to this. Stress and isolation caused by the pandemic clearly played a role. While teens are back in school, re-entry has been difficult for many. Social media clearly plays a role, inviting unrealistic comparisons, reinforcing negative thoughts and ideas, and encouraging doomscrolling. It is also a source of bullying: in the report, 16% of high school students reported being bullied electronically, including 20% of girls and 27% of those who identify as LGBTQ+.

Why the disconnect between teens and parents?

It’s not that surprising that parents don’t always know that their teens are considering suicide. Teens may not always realize how bad they are feeling, and may not want to tell their parents when they do — both for fear of worrying them, and also because of uncertainty about how their parents might react.

Parents may miss signs of depression in their teens, or quite genuinely misinterpret them or attribute them to something innocent; after all, it’s natural to want to believe that your child is fine, rather than thinking that they might be suicidal. And given how much drama can be intrinsic to the life of a teen, it’s understandable that parents could misinterpret statements about death or dying as, well, just teen drama.

What can parents do?

• Be aware of signs of depression in teens, and never ignore them. Acting sad is one of them, but there are many others:
  • dropping grades
  • being irritable or angry often
  • acting bored all the time, and/or dropping out of activities
  • difficulty with relationships, including changing peer groups or becoming more isolated
  • dangerous or risky behavior
  • persistent physical complaints such as headaches or stomachaches
  • fatigue.
• Listen to your teen, and never assume that statements like “nobody cares if I live or die” are just drama. Instead of saying, “You don’t mean that,” ask them if they do mean it. Often parents worry that asking about suicide might “give them ideas,” but asking may be the only way to know — and the best way to show your teen that you are taking them seriously.
• Learn how to have tough conversations about mental health and suicide. The American Academy of Pediatrics has many tips and resources for parents.
• Get help. Call your doctor, call a mental health professional, call the new nationwide number 988 that can link you to local help like a suicide hotline, or take your child to a local emergency room. This is crucial. If counseling is recommended, do your best to schedule it, letting your doctor know if you are having trouble finding a provider. Make sure your teen sticks with it.
• If you suspect your teen may be depressed or suicidal, take precautions. If you have a gun in your house, make sure it is locked up with the ammunition locked separately. Take stock of prescription medications and alcohol in your house that could be used for self-harm, and either get rid of them or be sure they are stored safely.

Sometimes it is just drama — or short-term blues after a breakup or another one of life’s inevitable disappointments. And in the study, half of the teens whose parents thought they were suicidal, and two-thirds of those whose parents believed their teens thought about death, said they were fine. But when it comes to suicide, it’s always better to be safe than sorry. So ask the questions — and ask for help.

About the Author

Claire McCarthy, MD, Senior Faculty Editor, Harvard Health Publishing

Claire McCarthy, MD, is a primary care pediatrician at Boston Children’s Hospital, and an assistant professor of pediatrics at Harvard Medical School. In addition to being a senior faculty editor for Harvard Health Publishing, Dr. McCarthy … See Full Bio View all posts by Claire McCarthy, MD