yeah, basically fiber is incapable of causing any glycemic load and has no glycemic index, so it has no effect on insulin.
there are 2 types of fiber as well tho, just keep them in mind
Insoluble Fiber
Functions of Insoluble Fiber
move bulk through the intestines
control and balance the pH (acidity) in the intestines
Benefits of Insoluble Fiber
promote regular bowel movement and prevent constipation
remove toxic waste through colon in less time
help prevent colon cancer by keeping an optimal pH in intestines to prevent microbes from producing cancerous substances
Food Sources of Insoluble Fiber
Vegetables such as green beans and dark green leafy vegetables
Fruit skins and root vegetable skins
Whole-wheat products
Wheat oat
Corn bran
Seeds & Nuts
Soluble Fiber
Functions of Soluble Fiber
bind with fatty acids
prolong stomach emptying time so that sugar is released and absorbed more slowly
Benefits of Soluble Fiber
lower total cholesterol and LDL cholesterol (the Bad cholesterol) therefore reducing the risk of heart disease
regulate blood sugar for people with diabetes
Food Sources of Soluble Fiber
Oat/Oat bran
Dried beans and peas
Nuts
Barley
Flax seed
Fruits such as oranges and apples
Vegetables such as carrots
Psyllium husk