A contraindication:

1, by the liver disease crowd, if you are by the liver disease problem, then, after ingesting a high dose of fish oil is likely to make the liver disease patients bleeding.

2, fish or seafood allergy crowd, if you are allergic to fish or seafood crowd, then, after taking it may appear allergic to the problem, therefore, it is recommended that this type of crowd in the choice of fish oil must be careful.

3, bipolar patients. Because the intake of high doses of fish oil is likely to increase the symptoms of bipolar patients, so it is recommended that this type of people must avoid taking it.

4, depression patients. Depressed patients may make your depression problem more serious after taking fish oil, so, it is recommended that this type of patients must avoid taking it.

Two, efficacy and role:

1, brain health and intelligence

The DHA component of fish oil is another special unsaturated fatty acids, is the formation of brain cells, development and functioning of the indispensable material basis. Scientists have found that the "neuronal projection cells" in the brain contain a large amount of DHA, which makes it easier for the brain's neurotransmitters to convey the correct messages.

Therefore, DHA plays a role in promoting and coordinating neural circuits to maintain the normal functioning of brain cells, thereby enhancing concentration, memory, and attention.

2, improve bad mood

EPA and DHA have a close relationship with emotional balance. When the concentration of EPA and DHA in the blood is low, the chance of mild to moderate depression will be significantly higher. A large number of clinical experiments have proved that, compared with people who do not like to eat fish, those who love to eat fish are more positive and optimistic in the face of difficulties and stress, which is because the EPA and DHA contained in the fish also have the effect of improving mood.

3, to help fight inflammation

EPA and DHA also has anti-inflammatory activity. When the body intake of Omega-6-fatty acids (vegetable oils usually contain a lot of) too much and Omega-3-fatty acids are not enough, the body will produce some chemicals that lead to inflammatory reactions. The EPA and DHA in fish oil can balance the excess Omega-6-fatty acids, so fish oil is often used to improve various inflammatory diseases such as rheumatoid arthritis.

Fish oil effects are overblown

According to the Life Times, Prof. Huang Guowei, dean of the School of Public **** Health and head of the Department of Nutrition at Tianjin Medical University, told us that theoretically, the omega-3 polyunsaturated fatty acids contained in fish oil are the building blocks of the brain and retina. Fish oil does have a certain role in improving memory and protecting the retina, but there are not many studies on fish oil's ability to prevent Alzheimer's disease and improve eyesight, and the evidence is not yet sufficient.

In addition, deep-sea fish oil in the DHA, EPA (all belong to the omega-3 polyunsaturated fatty acids) content is indeed relatively high, there is a role in regulating blood lipids, but its role in regulating blood pressure is very limited.

Reference: Baidu Encyclopedia - fish oil capsules, People's Daily Online - fish oil health products have magical effects? It's all blown out of proportion