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Macronutriments – Glucides

Beta-glucan

Soluble fiber with cholesterol-lowering and glucose-regulating properties.

Definition

A soluble polysaccharide primarily found in the cell walls of whole grains, yeast, and mushrooms. It is a recognized dietary fiber for its beneficial effects on cardiovascular and metabolic health.

How it works

Beta-glucan is a complex molecule composed of glucose linked by beta-glycosidic bonds, making it resistant to human digestion. This characteristic allows it to pass through the small intestine without being absorbed, then to be fermented by colonic microbiota. This fermentation produces beneficial short-chain fatty acids and creates viscosity in the digestive tract, slowing down nutrient absorption.

Role

Regulates cholesterol and glucose levels, improves intestinal health, and supports immunity.

Examples

  • Oats
  • Barley
  • Beer yeast
  • Shiitake mushrooms
  • Oat bran
  • Oat flakes

Recommendations

Consume at least 3 grams of beta-glucan per day to benefit from its cholesterol-lowering effects. Gradually incorporate oat or barley sources into meals and increase hydration to facilitate digestive tolerance. Prefer unprocessed whole grain products.

Key takeaway

Beta-glucan is an essential soluble fiber for maintaining a healthy cholesterol level and stable blood sugar.

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