Source: Medical News Today
Thursday 11 April 2024 18:34:04
A recent study aimed to estimate the potential national and global health benefits of substituting red meat with forage fish such as anchovies, herring, and sardines.
According to the findings, replacing red meat with forage fish could prevent up to 750,000 deaths and lower disability linked to diet-related diseases by 2050.
The researchers emphasize this dietary shift could be particularly beneficial for low and middle-income countries due to the affordability and abundance of these fish in those regions, alongside the severe impact of heart disease in these areas.
The study is published in BMJ Global Health.
The researchers constructed distinct scenarios to assess the effects of substituting red meat with forage fish based on anticipated dietary trends in 137 countries by the year 2050.
They used a comparative risk assessment framework to investigate how such substitutions could reduce the global burden of diet-related noncommunicable diseases in adults.
Among the proposed scenarios, prioritizing fish distribution to regions with low fish consumption, particularly in lower and middle-income countries, showed the most promise in diminishing global disease burdens.
Their comprehensive analysis suggested that substituting red meat with forage fish could potentially save between 500,000 to 750,000 lives by reducing diet-related diseases by the year 2050, primarily by lowering the incidence of coronary heart disease.
Implementing this change could also help decrease the years lived with disability by 8 to 15 million, primarily benefiting low- and middle-income nations, according to the researchers.
Noncommunicable diseases are responsible for 41 millionTrusted Source deaths annually, accounting for 74% of all deaths worldwide. A staggering 77% of these deathsTrusted Source occur in low- and middle-income countries.
The researchers note that nearly half of the global deaths linked to noncommunicable diseases are attributed to major illnesses such as coronary heart disease, stroke, diabetes, and colorectal cancer.
With studiesTrusted Source increasingly linking the consumption of red meat, such as beef, pork, and lamb, and processed meats to a higher risk of these diseases, the present study authors emphasized:
While forage fish cannot fully replace red meat globally, this study suggests this dietary shift could increase average daily fish consumption to close to the recommended 40 kcal in many countries.
This could potentially reduce the prevalence of coronary heart disease, stroke, diabetes, and colorectal cancer by 2% by 2050, according to the study results.
Can forage fish help prevent disease?
Thomas M. Holland, MD, physician-scientist at the RUSH Institute for Healthy Aging, Rush University System for Health, who was not involved in the study, highlighted the benefits of transitioning from red meat to forage fish.
“These benefits include improved cholesterol levels, brain health, and cardiovascular health,” he said.
He attributed these benefits mainly to forage fish’s omega-3 fatty acidsTrusted Source, such as EPA and DHA, known to reduce inflammation, blood pressure, low-density lipoprotein (LDL) cholesterol, and triglyceride levels.
Eliza Whitaker, MS, RDN, a registered dietitian and medical nutrition advisor at Dietitian Insights, who was not involved in the study, echoed this and told MNT, “Omega-3 fatty acids may also reduce the risk of developing certain types of cancers.”
Whitaker noted that beyond their fatty acid profile, these small fish are rich in other health-promoting essential nutrients, too, including vitamins D and B12, and minerals such as calcium, iron, and zinc.
In contrast, the World Health OrganizationTrusted Source has classified red meat as possibly carcinogenic to humans, specifically due to evidence suggesting a link between consuming red meat and developing colorectal cancer. This is in addition to links between red meat and other diet-related diseases, including diabetesTrusted Source and ischemic heart diseaseTrusted Source.
Sophie Lauver, MS, RD, a registered dietitian and owner of Plant-Based Perspective, who was also not involved in the study, suggested another important consideration when comparing the two different protein sources.
Compared to red meat, fish contain lower levels of dietary advanced glycation end products (AGEs), which produce oxidative stress and inflammation in the body and are linked to chronic diseases, she explained.
Overall, forage fish may be more nutritionally beneficial and health-promoting, while red meat, higher in saturated fats and AGEs, may contribute more to disease states.
Individuals who are looking for plant-based sources of omega-3 fatty acids have various options, such as nuts, seeds, and marine microalgae.
Lauver explained that marine microalgae are a direct source of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), which is where fish get their omega-3s. Thus, microalgae bypass the need for fish consumption, making them a particularly valuable addition for vegetarians and vegans.
Microalgae can be consumed as a food or supplement and, if grown in controlled environments, “can help to reduce exposure to industrial pollutants often found in fish,” said Lauver.
Although nuts and seeds, such as chia seeds, flaxseeds, and walnuts, do not provide EPA and DHA, they supply ALA (alpha-linolenic acid), which the body can convert into EPA and DHA to some extent, she explained.
Whole food, plant-based omega-3 options also have the added benefit of dietary fiber, absent in forage fish, said Whitaker, making them a nutritious part of a healthy diet.