Carob and Dietary Fiber
Carob is one of the fruits rich in dietary fiber. However, what distinguishes carob fiber from other fiber sources is not only its quantity, but also its quality: The fiber from the fruit flesh is predominantly insoluble and contains significant amounts of polyphenols. Carob gum, obtained from the seed, is a water-soluble and thickening fiber.
In this article, we discuss the amount of fiber in carob, the types of fiber, scientific studies examining the relationship of fiber with the feeling of satiety and digestion, and how these studies should be interpreted.
What is Dietary Fiber and Why is it Important?
Dietary fiber is carbohydrates and associated components found in plant foods that reach the large intestine undigested in the small intestine. Fibers are roughly divided into two groups:
| Soluble fibers | They are fibers that can form a gel-like structure when they come into contact with water, giving consistency. Pectins, some gums and galactomannans are in this group. |
| Insoluble fibers | Insoluble in water; They are structural components such as cellulose, hemicellulose and lignin. They usually contribute to stool volume. |
This distinction is particularly important for carob, as different parts of the fruit provide different types of fiber. The pulp is predominantly insoluble fiber, while the carob gamut from the core endosperm is soluble fiber.
How Much Fiber Is in Carob?
The fiber content of carob varies depending on the type of product and the method of analysis, but it is high:
- According to USDA FoodData Central data, in 100 grams of carob flour 39.8 grams total dietary fiber is found (USDA FoodData Central, 2019).
- In review studies, carob pulp is generally found to be the total dietary fiber. 30–40 percent (Goulas et al., 2016).
- In the analyzes conducted in Cyprus, fiber in the pulp of local varieties was measured as 25.43–26.24 percent, and in commercial carob powders as 30.35 and 37.32 percent (Papaefstathiou et al., 2018).
In the same Cyprus study, researchers stated that according to the European Union's nutritional claim guidelines, products such as locust bean pods, carob powder, and carob coffee fall into the category of "high fiber content". In contrast, processed products such as candies and syrups have a much lower fiber content (Papaefstathiou et al., 2018). In other words, the product to be preferred to benefit from the fiber advantage is additive-free carob powder or fruit; molasses and syrups are not a meaningful source of fiber.
For the overall nutritional profile of carob Nutritional Values of Carob You can check our article.
Structure of Carob Fiber: Insoluble Fiber and Polyphenols
The product, called "carob fiber" in the scientific literature, is obtained by removing most of the soluble sugars as a result of the extraction of carob pulp with water. The insoluble fraction of this fiber consists of cellulose, hemicellulose, lignin and insoluble polyphenols and constitutes at least 70 percent of carob fiber. Researchers define carob fiber as a predominantly insoluble and practically low-fermentable fiber that differs from other fiber sources due to its high polyphenol content (Goulas et al., 2016).
Polyphenols in carob fiber were also examined in detail. In a study conducted in Germany, 24 different polyphenol compounds were identified in carob fiber; the total yield was found to be 3.94 g/kg in dry weight. Approximately 42 percent of these polyphenols consisted of free gallic acid, 29 percent gallotanins, and 26 percent flavonoids (Owen et al., 2003).
This feature is important; because it is thought that some of the effects observed in human studies with carob fiber may be related not only to the fiber, but also to the polyphenols found with the fiber. Therefore, the results of these studies should not be directly generalized to carob powder or fruit.
Carob Fiber and the Feeling of Satiety
It is generally accepted that fibrous foods can contribute to the feeling of satiety. Human studies on carob provide interesting but limited data on this subject.
A study conducted in Greece compared a carob snack containing equal amounts of usable carbohydrates with a chocolate chip cookie in healthy adults of normal weight. Participants who consumed a carob snack before lunch reported less hunger and desire to eat between snack and meal, and received less energy in the free meal that followed (Papakonstantinou et al., 2017).
In a controlled study conducted in Germany, a liquid meal with polyphenol-rich carob fiber significantly reduced the levels of acylated ghrelin, known as the "hunger hormone", after the meal compared to the control meal (Gruendel et al., 2006). However, in a subsequent study by the same research group, it was observed that acylated ghrelin levels increased in the fasting state one day after carob fiber consumption (Gruendel et al., 2007). These conflicting results suggest that the effect of carob fiber on appetite is not yet clear.
In a study conducted in Turkey, white bread enriched with carob molasses pulp flour and wheat germ contained higher fiber than control bread and increased the feeling of satiety reported by the participants with visual analog scales; it was reported that it did not make a significant difference in blood sugar response (Tuşat et al., 2025).
Carob and Digestion: Bowel Movements
The contribution of insoluble fibers to stool volume is the first issue that comes to mind in the relationship of carob fiber with digestion. However, carob is an interesting example in this respect; because it has traditionally been used mostly in case of diarrhea.
In a randomized study conducted in Belgium in infants aged 3–21 months, the duration of diarrhea was found to be shorter in the group given tannin-rich carob powder in addition to oral fluid therapy compared to placebo (Loeb et al., 1989). The powder used in this study contained 26.4 percent dietary fiber and high levels of tannins, according to the researchers. We discuss this topic in detail in our article Carob and the Digestive System.
On the other hand, in a real-life study using soluble fiber carob gamut in infant formulas, it was reported that stool frequency increased and its consistency softened in infants using the formula, but the values remained within the physiological range; researchers have associated this with increased fiber load (Tounian et al., 2020).
These two examples show that a one-way generalization such as "carob fiber affects bowel movements in the following direction" is not correct. Effect; It depends on the product used (pulp, fiber concentrate or gum), the amount, the condition of the person and the rest of the diet.
Is Carob Fiber Related to Cholesterol?
One of the most researched topics of carob fiber is its effect on blood lipids. In some randomized controlled trials conducted in people with high cholesterol, products containing carob fiber have been reported to be associated with a decrease in LDL cholesterol (Zunft et al., 2003; Ruiz-Roso et al., 2010). It should be noted that the products used in these studies were special carob fiber preparations rich in polyphenols. We discuss the subject with its limitations Carob Effect on Cholesterol: What Does the Research Say? We discuss it in our article.
Fiber Intake with Carob in Daily Nutrition
- The most fiber-efficient forms are unadulterated carob powder and fruit; molasses and syrups are poor in fiber.
- Carob powder can be added to recipes such as cakes, cookies, oatmeal, yogurt, or smoothies.
- Carob also contains natural sugar; portion control should not be neglected when consuming it for fiber.
- Adequate fluid consumption is also important when increasing fiber intake.
- Increasing fiber intake suddenly and in large amounts may lead to discomfort such as bloating in some people; gradual increase is more appropriate.
- Those with digestive system diseases or those who take regular medication should consult a physician before using fiber supplements.
Considering carob as a source of fiber does not mean seeing it as a standalone solution. It should be considered part of a varied diet consisting of vegetables, fruits, legumes and whole grains.
Frequently Asked Questions
Is carob fiber soluble or insoluble? The fiber from the pulp is predominantly insoluble; it is reported that at least 70 percent of carob fiber consists of the insoluble fraction (Goulas et al., 2016). Carob gum obtained from the kernel is a soluble fiber.
How much fiber is in 100 grams of carob powder? According to USDA data, 100 grams of carob flour contains 39.8 grams of total dietary fiber. Different values can be seen depending on the product and analysis method.
Is carob molasses a source of fiber? Since molasses is obtained by condensing the water-soluble components of the fruit, most of the fiber remains in the pulp during production.
Does carob give a feeling of satiety? In some studies, carob products have been reported to increase the feeling of satiety and reduce energy intake at the next meal. However, the studies are small-scale and short-term; it is not enough to make a definitive generalization.
Fiber-Rich Carob Products with Carob Türkiye
Carob, especially with its powder and fruit, is a natural food with high fiber content. The fact that most of the fiber is insoluble and found together with polyphenols makes carob scientifically interesting.
At Carob Türkiye, we supply carob fruit, crumbs, flour/powder, kernels, and extracts. Carob Flour / Powder and Carob Fruit You can review our pages, for your wholesale and export requests. You can contact us.
This content is for informational purposes only; it is not a substitute for medical advice.
Domestic resources
Tuşat, E., Parlak, E., Yıldırım, G., Öztop, K., Gülşen, B., Özdemir, Y., Uysal, Y., "Impact of White Bread Fortified With Carob Molasses Pulp Flour and Wheat Germ on Glycemic Response and Antioxidant Capacity in Healthy Subjects", Food Science & Nutrition, 13(12), e71046, 2025 (study conducted in Turkey). doi.
org/ 10. 1002/ FSN3. 71046 Foreign sources
U.S. Department of Agriculture, Agricultural Research Service, "Carob flour (FDC ID 173755), SR Legacy", FoodData Central, 2019. FDC.
horseshoes. USDA. gov/ food- details/ 173755/ Nutrients Goulas, V., Stylos, E., Chatziathanasiadou, M.V., Mavromoustakos, T., Tzakos, A.G., "Functional Components of Carob Fruit: Linking the Chemical and Biological Space", International Journal of Molecular Sciences, 17(11), 1875, 2016. doi.
org/ 10. 3390/ ijms17111875 Papaefstathiou, E., Agapiou, A., Giannopoulos, S., Kokkinofta, R., "Nutritional characterization of carobs and traditional carob products", Food Science & Nutrition, 6(8), 2151–2161, 2018. doi.
org/ 10. 1002/ FSN3. 776 Owen, R. W., Haubner, R., Hull, W. E., Erben, G., Spiegelhalder, B., Bartsch, H., Haber, B., "Isolation and structure elucidation of the major individual polyphenols in carob fibre", Food and Chemical Toxicology, 41(12), 1727–1738, 2003. doi.
org/ 10. 1016/ S0278- 6915(03)00200- x Papakonstantinou, E., Orfanakos, N., Farajian, P., Kapetanakou, A.E., Makariti, I.P., Grivokostopoulos, N., Ha, M.A., Skandamis, P.N., "Short-term effects of a low glycemic index carob-containing snack on energy intake, satiety, and glycemic response in normal-weight, healthy adults: Results from two randomized trials", Nutrition, 42, 12–19, 2017. doi.
org/ 10. 1016/ j. nut. 2017. 05. 011 Gruendel, S., Garcia, A. L., Otto, B., Mueller, C., Steiniger, J., Weickert, M.O., Speth, M., Katz, N., Koebnick, C., "Carob pulp preparation rich in insoluble dietary fiber and polyphenols enhances lipid oxidation and lowers postprandial acylated ghrelin in humans", Journal of Nutrition, 136(6), 1533–1538, 2006. doi.
org/ 10. 1093/ jn/ 136. 6. 1533 Gruendel, S., Garcia, A.L., Otto, B., Wagner, K., Bidlingmaier, M., Burget, L., Weickert, M.O., Dongowski, G., Speth, M., Katz, N., Koebnick, C., "Increased acylated plasma ghrelin, but improved lipid profiles 24-h after consumption of carob pulp preparation rich in dietary fibre and polyphenols", British Journal of Nutrition, 98(6), 1170–1177, 2007. doi.
org/ 10. 1017/ S0007114507777127 Loeb, H., Vandenplas, Y., Würsch, P., Guesry, P., "Tannin-rich carob pod for the treatment of acute-onset diarrhea", Journal of Pediatric Gastroenterology and Nutrition, 8(4), 480–485, 1989. doi.
org/ 10. 1097/ 00005176- 198905000- 00010 Tounian, P., Meunier, L., Speijers, G., Oozeer, R., Vandenplas, Y., "Effectiveness and Tolerance of a Locust Bean Gum-Thickened Formula: A Real-Life Study", Pediatric Gastroenterology, Hepatology & Nutrition, 23(6), 511–520, 2020. doi.
org/ 10. 5223/ pghn. 2020. 23. 6. 511 Zunft, H.J., Lüder, W., Harde, A., Haber, B., Graubaum, H.J., Koebnick, C., Grünwald, J., "Carob pulp preparation rich in insoluble fibre lowers total and LDL cholesterol in hypercholesterolemic patients", European Journal of Nutrition, 42(5), 235–242, 2003. doi.
org/ 10. 1007/ S00394- 003- 0438- y Ruiz-Roso, B., Quintela, J.C., de la Fuente, E., Haya, J., Pérez-Olleros, L., "Insoluble carob fiber rich in polyphenols lowers total and LDL cholesterol in hypercholesterolemic sujects", Plant Foods for Human Nutrition, 65(1), 50–56, 2010. doi.
Scientific Resourcesorg/ 10. 1007/ S11130- 009- 0153- 9
