One food stands out in the table, offering an impressive fiber content with few calories : Glucomannan.
Glucomannan is extracted from the tuber of the Asian konjac plant ( Amorphophallus konjac ). To produce it, the root is first shredded, dried, and ground into flour. The dietary fiber is then extracted from this flour and dried again. This is how glucomannan achieves its outstanding dietary fiber content of 92 percent .
In Asia, glucomannan has been used for thousands of years as a natural starch – among other things, for the production of glass noodles. In Europe, it has gained popularity in recent years, particularly as a natural aid in weight loss, due to its satiating properties. Glucomannan has the ability to bind large amounts of water, thus promoting a natural feeling of fullness in the stomach.
The European Food Safety Authority (EFSA) confirms that glucomannan, in combination with a calorie-reduced diet, can contribute to weight loss . This requires a daily intake of 3 grams of glucomannan, distributed throughout meals. But how exactly does glucomannan contribute to weight loss?
The fiber in glucomannan swells considerably in the intestines, leading to a faster and longer-lasting feeling of fullness. In fact, glucomannan can bind 50 times its own weight in water , giving it the highest water-binding capacity of all natural substances. This increased volume in the stomach signals satiety to your body, which in turn helps reduce your hunger and thus your calorie intake.
However, it's important to emphasize that the feeling of satiety isn't solely caused by a full stomach. The perception of hunger and satiety is a complex process influenced by various factors. The hormones ghrelin (which stimulates your appetite) and leptin (which signals satiety) are particularly important. Proteins and fiber can increase your feeling of fullness. Stress , lack of sleep, and your emotional state , on the other hand, stimulate your appetite. Glucomannan, with its high swelling capacity, helps to increase the volume of stomach contents, thus making a valuable contribution to satiety.
Scientific studies also confirm that glucomannan can effectively contribute to weight loss. A 2014 meta-analysis published in the journal Obesity Reviews examined the effect of glucomannan on body weight in overweight and obese individuals. The analysis found that a daily intake of two to four grams of glucomannan led to significant weight loss and also lowered cholesterol levels.1 Lower cholesterol levels reduce the risk of cardiovascular disease because they reduce the buildup of plaque in the arteries. This promotes heart health and can help prevent heart attacks and strokes.