RS Fiber

Designs for Health

RS Fiber

Regular price $54.52
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RS Fiber contains two forms of type II resistant starch: green banana flour and potato starch powder. Resistant starches (RS) are defined as starches that are resistant to human enzymatic digestion in the upper gastrointestinal tract; they are metabolized into short-chain fatty acids by bacteria in the lower gastrointestinal tract and therefore do not contribute to blood sugar levels. Common starches differ from RAs in that they are broken down into glucose molecules in the upper gastrointestinal tract by enzymes in the mouth, pancreas and brush border of the small intestine. This glucose is rapidly absorbed resulting in a rapid, and sometimes drastic, increase in blood glucose. The RS Fiber blend provides 4 grams of resistant starches combined with 3 grams of regular starches, thus not allowing for a significant increase in blood glucose.

In the United States, the average total fiber intake is estimated at 15 g/day and the daily intake of RAs at 5 g5. This intake is well below the current recommended daily allowance (RDA) of 25-30 g/day and significantly lower than the 50-100 g of fiber consumed daily for much of human evolution18. The average diet in the United States is considered deficient in fiber, an important nutritional component for supporting good health. Crude starches, found in root vegetables and fruits, are an important component of the evolutionary diet in humans. This may explain why the human gastrointestinal tract and the body's glucoregulatory mechanisms are not adapted to properly metabolize large amounts of refined and concentrated sugars and starches and benefit more from starch that is resistant to digestion.


Adults: Take 1 scoop (10 g, providing 6.8 g of fiber) daily or follow your healthcare professional's instructions. Best if mixed in a liquid using a blender or mixing bottle. Can also be mixed with food such as yogurt or gluten-free cereals.