Research Question:
Although laboratory studies suggest that long chain n-3 polyunsaturated fatty acids can reduce the risk of getting asthma, epidemiological data remain controversial and inconclusive. It was therefore carried out this review article.

Lowers eating fish or taking fish oil supplements the chance of getting asthma?

Study Design:
This overview article contained 11 prospective cohort studies and 4 RCTs with a total of 99093 participants, of which 32226 people with asthma.

Research Question:
Fish consumption can protect against colon cancer, but the results of observational studies are inconsistent. It was therefore carried out this review article.

Eating fish reduces the risk of getting colorectal cancer?

Research Question:
There is evidence that points to a possible role of nutrition in cancer etiology. Preliminary studies that show the relationship between fish consumption and the risk of lung cancer investigated, showed conflicting results. It was therefore carried out this review article.

Eating fish reduces the chances of getting lung cancer?

Study Design:
This overview article contained 17 case-control studies and cohort studies with 8799 3 people with lung cancer and 17072 controls.

There was no publication bias.

Research Question:
The association between fish consumption and getting heart failure (HF) is inconsistent. It was therefore carried out this review article.

Study Design:
This overview article contained 5 prospective cohort studies (between 1953 until June 2012) with 170231 participants, of which 4750 people with heart failure. The average follow-up period was 9.7 years.