The truth about the effects of fish oil capsules

Among the many nutritional supplements that potentially offer the greatest health benefits to humans, fish oil capsules are among the most hyped. But is that really true?

While more research is still being conducted on fish oil, it remains unclear whether nutritional supplements, in the form of fish oil capsules, provide all the health benefits advertised or are as harmless as some previous claims.

Some of the potential benefits of fish oil, which emerged in early studies of nutritional supplements, seem to have disappeared in later studies. Along with the difficulty in isolating the effects of a single nutrient, it's possible that the early studies had small sample sizes or that the study subjects were actually deficient in nutrients. Since then, long-term studies have revealed that fish oil supplementation is not necessarily harmful.

Fish oil capsules contain a variety of vitamins and two important omega-3 fatty acids called eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Although these nutrients are crucial, like many other vitamins, many people are deficient in them due to their diets. Because these fatty acids are found in many types of fish, people are often recommended to eat fish twice a week.

Additionally, the amounts of EPA and DHA fatty acids in each fish oil supplement can vary, so checking the product label is crucial. There are always benefits and risks associated with supplements and functional foods, so you should consult a specialist before deciding whether you will receive the benefits from using them.

Eye health

Studies show that omega-3 fatty acids found in fish oil play a crucial role in the early development of the eyes. However, it remains unclear whether this compound can help protect the eyes as people age.

Studies have shown that consuming omega-3 fatty acids may improve age-related macular degeneration, a relatively common condition that can lead to vision loss. However, recent research published in the Journal of the American Medical Association suggests little to no benefit from taking fish oil supplements.

Cardiovascular health

Regarding cardiovascular health, eating fish is recommended as a heart-healthy way to supplement protein, replacing red meat. Studies have also found evidence that fish oil supplements can help lower triglycerides—blood compounds linked to heart disease—and reduce the risk of heart attack.

However, while fish oil supplements may benefit those at risk for heart disease, researchers remain skeptical about their effects on healthy individuals, as high-dose omega-3 intake has been linked to an increased risk of stroke. High-dose omega-3 intake may also interfere with the effectiveness of certain medications, such as blood thinners, according to the National Institutes of Health.

Brain health

DHA fatty acid is found in both the gray and white matter of the brain and is a crucial nutrient for early childhood development. This is why many efforts have been made to supplement this nutrient for young children, whether through breast milk or formula.

However, the use of DHA supplements such as fish oil capsules has not shown clear benefits for adults in maintaining cognitive function as they age. While some studies suggest that taking fish oil capsules may help increase brain size, scientists still lack conclusive evidence that DHA ultimately helps prevent Alzheimer's disease.

A 2012 study by the health advisory organization Cochrane also found no benefit from fish oil capsules for lucid older adults.

According to vietnamnet