Immune Function

People with fairly stable weight over years were found more immune to diseases. Immune function is measured in terms of 'natural-killer-cell' activity in one's body. People who lose weight after practising a certain weight loss program or diet plan, and again gain weight are seen with negative effect on immune system where as people who maintain their weight over a long period have positive effects.

Also losing weight in a short period is unhealthy. It is seen in such cases, that the person's natural-killer-cell function gets decreased due to such 'loss and gain' in weight. Women who maintained the same weight for five or more years had 40 percent greater natural-killer-cell activity as compared to those whose weight had remained stable for fewer than two years.

It is necessary to maintain weight very close to our ideal weight. for a long time. A person who repeatedly loses and regains weight, may have a lasting negative impact on immune function, according to new findings by researchers. Conversely, maintaining the same weight over time appears to have a positive effect on the immune system.

Natural-killer cells are a vital part of the immune system. These cells kill viruses and also responsible for killing cancer cells. Depressed natural killer cells activity has been associated with increased cancer incidence as well as an increased susceptibility to colds and infections. So fast weight loss programs, use of diet pills to lose weight are dangerous in this regard. Losing weight very fast may result in gaining it fast as it is hard to stick to a particular diet plan and exercise.