why do you need Fiber in foods and is it used to build up muscles

http://www.webmd.com/diet/features/why-you-need-more-fiber

Fiber is an important component of a healthy diet for several reasons, and while it does not directly contribute to muscle building, it plays a crucial role in overall health and well-being.

1. Digestive health: Fiber aids in maintaining a healthy digestive system. It adds bulk to the stool, preventing constipation, and promoting regular bowel movements.

2. Weight management: High-fiber foods tend to be more filling and may help control appetite. This can be beneficial for weight management as it can contribute to feeling satisfied with fewer calories.

3. Blood sugar control: Soluble fiber can slow down the absorption of sugar into the bloodstream, which helps stabilize blood sugar levels. This can be particularly beneficial for individuals with diabetes or those at risk of developing it.

4. Heart health: Consuming a diet rich in fiber has been associated with a lower risk of heart disease. Soluble fiber helps reduce LDL cholesterol levels ("bad" cholesterol), which is a risk factor for heart disease.

To get enough fiber in your diet, aim to include a variety of high-fiber foods such as whole grains (oats, brown rice, quinoa), fruits, vegetables, legumes (beans, lentils), and nuts/seeds in your meals. The recommended daily fiber intake is about 25-30 grams for adults.

While protein is primarily responsible for muscle building, consuming an adequate amount of fiber as part of a balanced diet is important to support overall health and optimize muscle function.