Taking correct dosage of fish oil supplements is very important; both the higher dose and lower dose are not recommended as it results in many adverse effects. The dosage of fish oil supplement is usually depends on three important factors:

Age

As we become older, the immunity level of the body goes down and we may get many health problems such as heart and cardiovascular problems. For this reason, an old person requires more dosage of supplement when compared to a young person.

Health condition 

Health condition is very important factor which has to be considered while taking fish oil supplements. If you have any health problem, it shows that you already have only little quantity of omega3 fatty acids in the blood. So high dosage of fish oil supplements will be the first aid to retrieve from your health problems, and then the dosage must be reduced depending on the health condition.

Quality of fish oil supplement

The quality of the supplement is very important because sometimes the fish oil supplements may contains toxins like lead, mercury, arsenic. These toxins can cause more harm than good.

For a healthy young adult, daily 500 mg of DHA is recommended and for a healthy kid, 250 mg of DHA per day is enough. So you can calculate the dosage based on the amount of DHA present in a fish oil supplement.