Carob and Heart Health
Cardiovascular diseases are among the most important health problems in the world, and nutrition plays an important role in blood lipids, which are one of the risk factors for these diseases. Carob has been the subject of various clinical studies on blood lipids due to its pulp rich in insoluble fiber and polyphenols.
In this article, we discuss the components of carob that have been associated with heart health, the results of human studies on cholesterol and triglycerides, the proposed mechanisms of action, and the limitations of this research in a balanced way.
The Relationship Between Heart Health and Nutrition
Cardiovascular health; It is associated with many factors such as blood pressure, blood lipids (total cholesterol, LDL and HDL cholesterol, triglycerides), blood sugar, body weight, smoking and physical activity. Nutrition can directly or indirectly affect many of these factors. LDL cholesterol, in particular, is one of the most monitored indicators for cardiovascular diseases.
To say that a food is "good for heart health", it should ideally be shown by long-term studies that that food reduces clinical events such as heart attack or stroke. There are no such long-term outcome studies for carob. The available evidence is based on short- and medium-term effects on intermediate indicators such as blood lipids. The evaluations in this article should be read within this framework.
Components Associated with Heart Health
| Insoluble fiber | The total dietary fiber in carob pulp is around 30–40 percent, with the majority being insoluble fiber composed of lignin, cellulose, and hemicellulose (Dahmani et al., 2023). |
| Polyphenols | 24 polyphenol compounds have been identified in carob fiber; the profile is predominant in gallic acid and gallothanes, with flavonoids also accounting for a significant share (Owen et al., 2003). |
| D-pinitol | It is a derivative of inositol found in carob; its possible role on lipid metabolism is debated in carob syrup studies (Planes-Muñoz et al., 2025). |
Flours derived from carob seeds are also of particular interest. In a study examining kernel flours, flours containing germ were noted to be rich in fatty acids such as oleic and linoleic acid, as well as β-sitosterol, suggesting that these lipids may provide benefits for cardiovascular health (Benito-Vázquez et al., 2024). However, this assessment is based on composition analysis; it is not a result tested in humans.
Clinical Studies on Cholesterol
The effect of carob on blood lipids has been studied in several clinical trials, especially in adults with high cholesterol levels.
German Studies (2001 and 2003)
In an open-label pilot study, 47 volunteers with moderate hypercholesterolemia consumed 15 g of carob preparations per day in three different products (breakfast cereal, fruit muesli bar, and powdered drink) in addition to their normal diet for 8 weeks. In the fourth week, there was a decrease of 7.1 percent in total cholesterol and 10.6 percent in LDL cholesterol; and in the sixth week, there was a decrease of 7.8 percent and 12.2 percent, respectively. HDL cholesterol and triglycerides were unchanged (Zunft et al., 2001). However, the results should be interpreted with caution as there was no control group in this study.
In a randomized, double-blind, and placebo-controlled study conducted by the same research group later, 58 hypercholesterolemic volunteers consumed bread and fruit bars with or without carob fiber for 6 weeks. A total of 15 g of carob fiber preparations per day were associated with a 10.5 percent decrease in LDL cholesterol. The LDL/HDL ratio decreased significantly at the borderline; women had an 11.3 percent decrease in triglycerides, and the lipid-lowering effects were found to be more pronounced in women than in men (Zunft et al., 2003).
Spain Study (2010)
In a double-blind, randomized, and placebo-controlled study testing insoluble carob fiber that is very rich in polyphenols, 88 hypercholesterolemic volunteers received 4 g of fiber or placebo twice daily for 4 weeks. In the fiber group, a decrease of 17.8 percent in total cholesterol, 22.5 percent in LDL cholesterol, 26.2 percent in LDL/HDL ratio, and 16.3 percent in triglycerides was reported compared to baseline; no significant change was observed in the placebo group (Ruiz-Roso et al., 2010).
Snack and Syrup Studies
In an 8-week study with obese patients with metabolic syndrome, a snack enriched with carob and wakame moss resulted in a 7.4 percent reduction in LDL cholesterol and a 5.8 percent reduction in total cholesterol compared to a control snack; no differences were found in anthropometric measurements and other cardiovascular indicators (Izaola et al., 2020). In this study, it was not possible to separate the effect of carob from wakame moss.
In a 6-week study with commercial carob syrups in healthy adults, consumption of 10 g of syrup per day was associated with statistically significant reductions in total cholesterol and waist circumference. The authors emphasized that the effects were modest and the results should be considered preliminary evidence (Planes-Muñoz et al., 2025).
| Operation | Participant / duration | Product | LDL cholesterol |
|---|---|---|---|
| Zunft et al., 2001 | 47 people / 8 weeks (uncontrolled) | 15 g/day preparation | 12.2% decrease in week 6 |
| Zunft et al., 2003 | 58 people / 6 weeks | 15 g/day fiber | 10.5% decrease |
| Ruiz-Roso et al., 2010 | 88 people / 4 weeks | 2 × 4 g/day polyphenol fiber | Down 22.5% (from baseline) |
| Izaola et al., 2020 | Obese patients/8 weeks | Carob + wakame snack | Down 7.4% |
| Planes-Muñoz et al., 2025 | 72 people / 6 weeks | 10 g/day syrup | Reduction in total cholesterol |
Suggested Mechanisms of Action
Several mechanisms have been proposed for how carob may affect blood lipids. Polyphenol-rich insoluble carob fiber has been reported to lower total and LDL cholesterol in cholesterol-fed rodents, and this effect is explained by the increased excretion of bile acids by binding by fiber in feces (Koebnick and Zunft, 2004). The removal of bile acids from the body can lead to the liver using cholesterol to produce new bile acid.
An evaluation compiling the lipid-lowering effects of carob extracts states that polyphenols and insoluble fiber, the two main components of pulp, are thought to exert beneficial effects on lipid metabolism; it states that the proposed mechanisms operate through three organ systems: digestive tract, liver, and adipose tissue. In the same evaluation, the antioxidant, anti-inflammatory, and vascular protective activities of carob products are also mentioned (Nemet et al., 2022).
As a finding of mechanism, there is also a laboratory study that reported that roasting carob flour reduced its capacity to bind bile acid glycoconjugates (van Rijs and Fogliano, 2020). This suggests that the way the product is processed may alter its possible effects.
Blood Pressure and Minerals
Carob is rich in potassium. It is reported that Anatolian carob pods contain approximately 970 mg of potassium per 100 g (Dahmani et al., 2023). Potassium is also the most abundant mineral in commercial carob molasses in Turkey; however, in the same analysis, sodium was found to be up to 2121 mg/kg in some samples (Yavuz Küçük & Duraklı Velioğlu, 2022). A human study directly examining the effect of carob on blood pressure is not among the sources we examined. Therefore, there is not enough evidence to say that carob has an effect on blood pressure.
Limitations and Considerations
Although the current studies on the relationship between carob and heart health are interesting, the following points should be considered for the correct interpretation of the results:
- The duration of the studies is between 4-8 weeks; long-term effects are unknown.
- There are no studies examining clinical outcomes such as heart attack or stroke.
- Most of the products used are specially prepared fiber preparations; it does not have the same composition as market products.
- The number of participants is limited, and some studies do not have a control group.
- In some studies, carob has been used in combination with other ingredients (e.g. wakame).
- Carob and especially molasses contain high amounts of sugar; total energy and sugar intake are also important for heart health.
People with high cholesterol or cardiovascular disease should consider carob as part of a balanced nutrition plan, not as a substitute for the treatment recommended by the physician. It is recommended that people taking medication share their dietary changes with their physicians.
Carob in Daily Nutrition
- Increasing fiber intake by adding carob powder to porridge, yogurt, or smoothies.
- Instead of cocoa and sugary creams, prefer homemade desserts prepared with carob powder.
- Replacing some of the flour with carob flour in whole grain bread and cake recipes.
- Using molasses in moderation and instead of sugar; not adding it as an additional source of sugar.
Frequently Asked Questions
Does carob lower cholesterol? A decrease in LDL cholesterol has been reported in some short-term clinical trials with polyphenol-rich carob fiber preparations. However, these results may not apply to every carob product and are not a substitute for treatment.
Is carob molasses beneficial for heart health? A study with commercial syrups showed a modest reduction in total cholesterol; however, molasses should be consumed in moderation because it contains high sugar.
Does carob lower blood pressure? Carob contains potassium; however, there are no human studies directly showing its effect on blood pressure.
Can someone who takes cholesterol medication consume carob? Carob is a food and can be part of a balanced diet; however, it should not be used instead of drug treatment, nutritional changes should be shared with the physician.
Carob with Carob Türkiye
The fiber and polyphenol content of carob is best preserved in its fruit, powder, and broken forms. As Carob Türkiye, we supply carob fruit, granules, flour/powder, seeds, and extracts; you can contact us for your wholesale and export requests.
For more information What is D-Pinitol in Carob? and Carob Polyphenols and Scientific Studies for our articles, for products Carob Flour / Powder and D-Pinitol Extract You can take a look at the pages.
This content is for informational purposes only; it is not a substitute for medical advice.
Domestic resources
Yavuz Küçük, A., Duraklı Velioğlu, S. "Determination of some chemical properties of the product offered for sale under the name of 'carob extract' and comparison with carob molasses", Gıda, 2022; 47(5): 889–903. doi.
org/ 10. 15237/ food. GD22033 Foreign sources
Zunft, H. J., Lüder, W., Harde, A., Haber, B., Graubaum, H. J., Gruenwald, J. "Carob pulp preparation for treatment of hypercholesterolemia", Advances in Therapy, 2001; 18(5): 230–236. doi.
org/ 10. 1007/ BF02853169 Zunft, H. J., Lüder, W., Harde, A., Haber, B., Graubaum, H. J., Koebnick, C. et al. "Carob pulp preparation rich in insoluble fibre lowers total and LDL cholesterol in hypercholesterolemic patients", European Journal of Nutrition, 2003; 42(5): 235–242. 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 subjects", Plant Foods for Human Nutrition, 2010; 65(1): 50–56. doi.
org/ 10. 1007/ S11130- 009- 0153- 9 Izaola, O., Primo, D., Rico Bargués, D., Martín-Diana, A. B., Martínez Villaluenga, C., Miranda, J. et al. "Effects of a snack enriched with carob and Undaria pinnatifida (wakame) on metabolic parameters in a double blind, randomized clinical trial in obese patients", Nutrición Hospitalaria, 2020; 34(3): 465–473. https://doi.org/10.20960/nh.02906; PubMed: pubmed.
NCBI. nlm. finally. gov/ 32379474/ Planes-Muñoz, D., Rosell, M. L. Á., Frontela-Saseta, C., López-Nicolás, R. "Evaluation of Commercial Carob Syrups (Ceratonia siliqua L.) in Randomized Controlled Trials: Effects on Lipid, Glycaemic, and Anthropometric Parameters", Foods, 2025; 14(21): 3676. doi.
org/ 10. 3390/ foods14213676 Nemet, M., Vasilić, M., Tomas, A. "Lipid-Lowering Effects of Carob Extracts (Ceratonia siliqua): Proposed Mechanisms and Clinical Importance", Frontiers in Pharmacology, 2022; 13: 921123. doi.
org/ 10. 3389/ fphar. 2022. 921123 Koebnick, C., Zunft, H. J. F. "Potential of dietary fibre from carob pods in the prevention and therapy of hypercholesterolemia and metabolic syndrome", Ernährungs-Umschau, 2004; (2). ernaehrungs-
umschau. de/ print- article/ 05- 02- 2004- potential... 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, 2003; 41(12): 1727–1738. doi.
org/ 10. 1016/ S0278- 6915(03)00200- X Dahmani, W., Elaouni, N., Abousalim, A., Akissi, Z. L. E., Legssyer, A., Ziyyat, A., Sahpaz, S. "Exploring Carob (Ceratonia siliqua L.): A Comprehensive Assessment of Its Characteristics, Ethnomedicinal Uses, Phytochemical Aspects, and Pharmacological Activities", Plants, 2023; 12(18): 3303. doi.
org/ 10. 3390/ plants12183303 Benito-Vázquez, I., Garrido-Romero, M., Hontoria-Caballo, G., García-García, C., Díez-Municio, M., Moreno, F. J. "Carob (Ceratonia siliqua) Flour as Source of Bioactive Compounds: Production, Characterization and Nutraceutical Value", Foods, 2024; 13(19): 3024. doi.
org/ 10. 3390/ foods13193024 van Rijs, P., Fogliano, V. "Roasting carob flour decreases the capacity to bind glycoconjugates of bile acids", Food & Function, 2020; 11(7): 5924–5932. doi.
Scientific Resourcesorg/ 10. 1039/ d0fo01158d
