Scientists say that although sun exposure is known to be a cause of skin cancer, it can help people fight cancer. Two studies found that vitamin D would help improve chances of survival for patients who have skin or colon cancer. Patients suffering from melanoma could take vitamin D from oily fish or supplements, but there is evidence from other studies that high levels of vitamin D are harmful.
There is evidence that vitamin D may be a reliable aid in preventing and treating many forms of cancer from the colon, breast to prostate cancer. Also, low levels of vitamin D may contribute to cognitive decline specific in aging. High levels of vitamin D may increase the risk of pancreatic cancer, unless we follow a balanced diet, keep weight within normal limits and exercise. Most specialists’ recommendation is 600 international units (IU) for adults aged up to 70 years, and 800 IU for those past that age.
Rich sources of vitamin D
In summer, this is easily achieved if you simply stay in the sun for at least 15 minutes a day. Of course, you should use sun cream protection and a hat, to stay away from sunstroke. In less sunny seasons-friendly, vitamin D can be obtained from food.
The richest natural sources are salmon, mackerel, tuna, sardines, egg yolk, liver, beef, grains, nuts, apples, dairy etc. If these are not enough, you can turn to dietary supplements with vitamin D, which can be found in two forms: D2 – ergocalciferol (the same type that is found in food) or D3 – cholecalciferol (as obtained from sun exposure).