There are two main types of omega-3 fatty acids found in fish oil: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). EPA and DHA are both long-chain omega-3 fatty acids, which means that they have 20 or more carbon atoms in their chemical structure.
EPA is thought to be more beneficial for heart health, while DHA is thought to be more beneficial for brain health. However, both EPA and DHA are important for overall health.
Other omega-3 fatty acids found in fish oil include alpha-linolenic acid (ALA). ALA is a short-chain omega-3 fatty acid, which means that it has only 18 carbon atoms in its chemical structure. ALA is not as beneficial for heart health as EPA and DHA, but it can be converted into EPA and DHA in the body.
The amount of EPA and DHA in fish oil supplements varies depending on the brand. Some supplements contain only EPA, while others contain a mixture of EPA and DHA. It is important to read the label carefully to determine the amount of EPA and DHA in a particular supplement.
The recommended daily intake of EPA and DHA for adults is 250-500 milligrams. However, some people may need more than this amount, depending on their individual health needs.