Lucknow Public College of Pharmacy, Madhoganj, Hardoi, Uttar Pradesh
Diabetes mellitus has high rates of morbidity and mortality, making it a global health concern. Because traditional pharmaceutical treatments can have negative side effects, there is increasing interest in complementary therapies, such as herbal cures. The purpose of this review paper is to investigate the use of several herbs in the treatment of diabetes, with an emphasis on their safety profiles, efficacy, and mechanisms of action. Multiple herbs have shown promise in regulating blood glucose levels and improving insulin sensitivity. However, clinical evidence varies, and further research is required to establish standardized treatment protocols.
The chronic metabolic disease known as diabetes mellitus (DM) is typified by elevated blood glucose levels brought on by either impaired insulin production, insulin resistance, or both. Diabetes is becoming more and more common worldwide, which puts more strain on healthcare systems. Many patients are using herbal therapy as a complementary or alternative choice, even if there are effective pharmaceutical treatments available. Although the scientific evidence for the effectiveness of herbal medicines is still developing, they are frequently thought to be safer and more natural.
This paper provides an overview of several herbs that have been investigated for their potential in managing diabetes, discussing their mechanisms, benefits, limitations, and evidence from clinical trials.
Herbs for Diabetes Management
1. Ginseng (Panax ginseng)
Mechanism of Action: Research has demonstrated that ginseng increases insulin secretion and enhances insulin sensitivity. Ginsenosides, which are present in it, may increase the synthesis of insulin by acting on beta cells in the pancreas.
Efficacy: According to clinical research, ginseng can dramatically reduce blood glucose levels in people with type 1 and type 2 diabetes. The benefits could vary depending on the type and dosage of ginseng, though, and the results are not always consistent. Safety: Generally regarded as harmless, although some people may experience mild side effects like headaches and insomnia.
2. Bitter Melon (Momordica charantia)
Mechanism of Action: Charantin, a substance found in bitter melon, has been demonstrated to imitate insulin and improve cells' absorption of glucose. By raising the activity of the enzymes involved in glycolysis, it may also enhance the metabolism of glucose.
Efficacy: Research has shown that diabetic individuals' blood glucose levels can be lowered by eating bitter melon. It has been very helpful in managing type 2 diabetes.
Safety: Although usually harmless, consuming too much of it can upset your stomach. Because of the possibility of hypoglycaemia, it should be used with caution in patients receiving insulin therapy.
3. Fenugreek (Trigonella foenum-graecum)
Mechanism of Action: Compounds like 4-hydroxyisoleucine, which are abundant in soluble fiber-rich fenugreek seeds, may help control blood sugar levels and enhance insulin sensitivity.
Efficacy: Studies show that fenugreek dramatically reduces blood sugar and enhances lipid profiles in diabetics. The plant is especially useful for controlling blood sugar rises that occur after meals.
Safety: Fenugreek is generally safe, though some individuals may experience mild gastrointestinal side effects.
4. Turmeric (Curcuma longa)
Mechanism of Action: Turmeric's active ingredient, curcumin, has antioxidant, anti-inflammatory, and insulin-sensitizing qualities. It may also lessen insulin resistance and improve pancreatic function.
Efficacy: Numerous studies have demonstrated that taking supplements of turmeric can lower the inflammatory markers linked to diabetes and enhance blood sugar regulation.
Safety: When used in moderation, turmeric is usually regarded as safe. Large dosages, however, could cause stomach problems or interfere with prescription drugs.
5. Garlic (Allium sativum)
Mechanism of Action: By raising insulin receptor activation, garlic has been demonstrated to improve glucose metabolism and insulin sensitivity. Additionally, it might lessen the oxidative damage linked to diabetes.
Efficacy: Garlic’s ability to reduce blood glucose levels has been supported by research, however it works best when combined with other dietary and lifestyle changes.
Safety: Although garlic might cause modest side effects including heartburn, gastrointestinal distress, or bad breath, it is generally safe for most individuals. Patients on anticoagulant drugs should use it with caution.
6. Cinnamon (Cinnamomum verum)
Mechanism of Action: Polyphenols found in cinnamon lower blood sugar and increase insulin sensitivity. Additionally, it might slow down the digestive tract's breakdown of carbs. Efficacy: Studies on humans and animals have indicated that cinnamon may help improve blood glucose management, particularly in type 2 diabetes. It is also known to reduce triglycerides and cholesterol.
Safety: Although typically safe, the coumarin component of Cassia cinnamon, in particular, can cause toxicity when consumed in excess. For increased safety, only use Ceylon cinnamon or Cinnamomum verum.
7. Gymnema Sylvestre
Mechanism of Action: Gymnema sylvestre may boost the pancreatic release of insulin by preventing the intestinal absorption of sugar.
Efficacy: Research has demonstrated that this plant lowers blood glucose levels while fasting and after meals. Additionally, it might increase the synthesis of insulin, which could be especially beneficial for people with type 2 diabetes.
Safety: Although gymnema is usually safe, patients who are already using antidiabetic medicines may have hypoglycemia.
8. Berberine (Berberis vulgaris)
Mechanism of Action: It has been demonstrated that berberine activates AMP-activated protein kinase (AMPK), which aids in controlling the metabolism of fats and carbohydrates. It can decrease blood glucose levels and increase insulin sensitivity.
Efficacy: One of the most effective herbal treatments for diabetes is berberine. It has been demonstrated in numerous trials to have blood sugar-lowering properties similar to those of metformin.
Safety: Although most people tolerate berberine well, some people may experience gastrointestinal problems like diarrhoea or constipation.
DISCUSSION
While numerous herbs have demonstrated potential for managing diabetes, it is important to recognize that results can vary based on the herb’s quality, dosage, and the individual’s response. Many studies have used animal models or small human trials, and while promising, these results need further validation through large-scale, well-controlled human studies. Additionally, the potential interactions between herbs and conventional medications should be carefully considered to prevent adverse effects.
Although several herbs have shown promise in the treatment of diabetes, it's crucial to understand that outcomes might differ depending on the quality of the herb, dosage, and the response of the individual. Although encouraging, the results of numerous studies that have employed animal models or modest human trials require additional verification by extensive, carefully monitored human research. To avoid negative effects, it's also important to carefully analyze any possible interactions between herbs and prescription drugs.
CONCLUSION
Herbal medicine offers a promising adjunct to the conventional management of diabetes. Herbs like ginseng, bitter melon, fenugreek, and turmeric show beneficial effects on blood glucose regulation, insulin sensitivity, and overall metabolic health. However, despite the encouraging data, further high-quality clinical trials are needed to confirm the long-term efficacy and safety of these herbs in diabetes management. Patients should consult healthcare providers before starting any herbal regimen, especially those already on antidiabetic medications, to ensure safe and effective use.
A possible supplement to the traditional treatment of diabetes is herbal medicine. Herbs that improve insulin sensitivity, blood glucose management, and general metabolic health include ginseng, bitter melon, fenugreek, and turmeric. Even yet, more excellent clinical research is required to validate the long-term safety and effectiveness of these herbs in the treatment of diabetes. To ensure safe and efficient use, patients should speak with their doctors before beginning any herbal regimen, especially if they are currently using antidiabetic medicines.
REFERENCES
1. Zhou, Y., et al. (2016). "Ginseng and its effects on diabetes: A review of the literature." Journal of Ethnopharmacology, 181, 65-75.
2. Motiwale, M. K., et al. (2019). "Bitter melon and diabetes: A review of recent literature." Phytotherapy Research, 33(4), 631-640.
3. Rehman, M. U., et al.(2015). "Fenugreek in diabetes: A review of the current literature." Diabetes & Metabolic Syndrome: Clinical Research & Reviews, 9(2), 95-98.
4. Sahebkar, A., et al. (2013). "The effect of curcumin on glucose control and diabetes management: A systematic review." Nutrition Research, 33(12), 930-939.
5. Sarker, M. M., & et al. (2016). "Curcumin as an Effective Antidiabetic Agent: A Comprehensive Review." Journal of Diabetes Research, 2016, 1-9.
6. Lao, C. D., et al. (2006)."Dose Escalation of a Curcuminoid Formulation." BMC Complementary and Alternative Medicine, 6(1), 10.
7. Tiwari, P., et al. (2013). "Antidiabetic Activity of Curcumin: A Review." International Journal of Pharmaceutical Sciences and Research, 4(2), 231-236.
8. Srinivasan, M., et al. (2007). "Antidiabetic Effect of Curcumin in Streptozotocin-Induced Diabetic Rats." Indian Journal of Physiology and Pharmacology, 51(2), 128-134.
9. Hussain, S. M., et al. (2013). "Curcumin as a Potential Antidiabetic Agent: Mechanisms of Action and Clinical Applications." Journal of Clinical and Diagnostic Research 7(9), 2007–2010.
10. Huang, M. T., et al. (1991)."Inhibition of Tumorigenesis by Curcumin: A Review of Mechanisms and Antidiabetic Effects." Journal of Natural Products, 54(3), 592-596.
11. Khan, A., et al. (2003). "Cinnamon Improves Glucose and Lipid Levels in Type 2 Diabetes Mellitus." Diabetes Care, 26(12), 3215-3218.
12. Blevins, S. M., & et al. (2007). "Effect of Cinnamon on Glucose and Lipid Levels in Non-Insulin-Dependent Type 2 Diabetes." Diabetes Care, 30(9), 2236-2237.
13. Cao, H., et al. (2009). "Cinnamon Extract Lowers Blood Glucose in Type 2 Diabetes Mellitus." The Journal of Traditional and Complementary Medicine, 1(1), 1–4.
14. Khan, M. A., et al. (2009). "Cinnamon as a Natural Remedy for Type 2 Diabetes Mellitus." Diabetes Research and Clinical Practice, 84(3), 211-219.
15. Davis, P. A., & et al. (2011). "Cinnamon and Its Effects on Blood Glucose in Type 2 Diabetes." Phytotherapy Research, 25(6), 824-826.
16. Ziegenfuss, T. N., et al. (2006). "Cinnamon Improves Glycemic Control in Type 2 Diabetes Mellitus." Diabetes Care, 29(8), 1797-1798.
17. Hlebowicz, J., et al. (2009). "Cinnamon Reduces Postprandial Blood Glucose, Insulin and Cholesterol Levels in Healthy Subjects." European Journal of Clinical Nutrition, 63(6), 687–693.
1. Zhou, Y., et al. (2016). "Ginseng and its effects on diabetes: A review of the literature." Journal of Ethnopharmacology, 181, 65-75.
2. Motiwale, M. K., et al. (2019). "Bitter melon and diabetes: A review of recent literature." Phytotherapy Research, 33(4), 631-640.
3. Rehman, M. U., et al.(2015). "Fenugreek in diabetes: A review of the current literature." Diabetes & Metabolic Syndrome: Clinical Research & Reviews, 9(2), 95-98.
4. Sahebkar, A., et al. (2013). "The effect of curcumin on glucose control and diabetes management: A systematic review." Nutrition Research, 33(12), 930-939.
5. Sarker, M. M., & et al. (2016). "Curcumin as an Effective Antidiabetic Agent: A Comprehensive Review." Journal of Diabetes Research, 2016, 1-9.
6. Lao, C. D., et al. (2006)."Dose Escalation of a Curcuminoid Formulation." BMC Complementary and Alternative Medicine, 6(1), 10.
7. Tiwari, P., et al. (2013). "Antidiabetic Activity of Curcumin: A Review." International Journal of Pharmaceutical Sciences and Research, 4(2), 231-236.
8. Srinivasan, M., et al. (2007). "Antidiabetic Effect of Curcumin in Streptozotocin-Induced Diabetic Rats." Indian Journal of Physiology and Pharmacology, 51(2), 128-134.
9. Hussain, S. M., et al. (2013). "Curcumin as a Potential Antidiabetic Agent: Mechanisms of Action and Clinical Applications." Journal of Clinical and Diagnostic Research 7(9), 2007–2010.
10. Huang, M. T., et al. (1991)."Inhibition of Tumorigenesis by Curcumin: A Review of Mechanisms and Antidiabetic Effects." Journal of Natural Products, 54(3), 592-596.
11. Khan, A., et al. (2003). "Cinnamon Improves Glucose and Lipid Levels in Type 2 Diabetes Mellitus." Diabetes Care, 26(12), 3215-3218.
12. Blevins, S. M., & et al. (2007). "Effect of Cinnamon on Glucose and Lipid Levels in Non-Insulin-Dependent Type 2 Diabetes." Diabetes Care, 30(9), 2236-2237.
13. Cao, H., et al. (2009). "Cinnamon Extract Lowers Blood Glucose in Type 2 Diabetes Mellitus." The Journal of Traditional and Complementary Medicine, 1(1), 1–4.
14. Khan, M. A., et al. (2009). "Cinnamon as a Natural Remedy for Type 2 Diabetes Mellitus." Diabetes Research and Clinical Practice, 84(3), 211-219.
15. Davis, P. A., & et al. (2011). "Cinnamon and Its Effects on Blood Glucose in Type 2 Diabetes." Phytotherapy Research, 25(6), 824-826.
16. Ziegenfuss, T. N., et al. (2006). "Cinnamon Improves Glycemic Control in Type 2 Diabetes Mellitus." Diabetes Care, 29(8), 1797-1798.
17. Hlebowicz, J., et al. (2009). "Cinnamon Reduces Postprandial Blood Glucose, Insulin and Cholesterol Levels in Healthy Subjects." European Journal of Clinical Nutrition, 63(6), 687–693.
Mohd Talib Khan, Herbs : For The Treatment of Diabetes, Int. J. of Pharm. Sci., 2025, Vol 3, Issue 9, 1181-1185. https://doi.org/10.5281/zenodo.17099188