by SAJEDA
(UK)
QUESTION: I was diagnosed with type 2 diabetes two months ago and have been trying to control it through diet. Can I take herbal medicine instead of metformin, or can herbs and metformin be taken together?
Do not replace metformin or another prescribed diabetes treatment with herbal medicine. No herbal product—including cinnamon, bitter melon, fenugreek, or gymnema—has reliable evidence that it controls type 2 diabetes as effectively or safely as established treatment. Some supplements can interact with medicines or affect glucose, the liver, or kidneys. Review your HbA1c and treatment options with your doctor before starting either metformin or a supplement.
Answer by Dr. Albana Greca, MD, MMedSc
Hi Sajeda,
It is reasonable to ask about all available options, but “natural” does not automatically mean effective or safe. Newly diagnosed type 2 diabetes should be treated according to your HbA1c, glucose readings, symptoms, kidney function, other health conditions, and personal goals.
Metformin is a commonly used first medicine for type 2 diabetes because it lowers glucose effectively, has a low risk of causing hypoglycemia when used alone, is widely available, and is usually weight-neutral. However, it is not automatically the best first treatment for every person.
Your doctor should review your HbA1c, kidney function, cardiovascular and kidney health, weight, pregnancy plans, other medicines, and possible side effects. Some people may need lifestyle treatment plus metformin, while others may benefit from a different medicine or combination from diagnosis.
Do not delay your appointment or decline treatment before discussing the actual HbA1c result. Our guide to diabetes medicines and their benefits explains why treatment is individualized.
Healthy eating, regular activity, sleep, and weight management when appropriate are essential for everyone with type 2 diabetes. In some people with mild hyperglycemia and no urgent symptoms, a clinician may agree to a closely monitored lifestyle trial. In others, medication should begin promptly because glucose or HbA1c is too high or because heart, kidney, or other risks favor treatment.
Lifestyle treatment and medication are not competing choices. They usually work together. Use your HbA1c and follow-up glucose results—not fear of medicine—to decide whether the plan is working.
Research on cinnamon, bitter melon, fenugreek, gymnema, berberine, and other supplements is inconsistent. Studies are often small and use different products, doses, and treatment periods. No herbal supplement has been proven to replace metformin or prevent diabetes complications reliably.
Capsules may also differ from the herbs used in food. Product strength, purity, and contamination can vary, and some supplements have been associated with liver or kidney injury. Claims such as “natural diabetes cure” or “replace your medicine” are warning signs.
Read our diabetes supplement safety guide before buying a glucose-lowering herbal product.
Do not assume the combination is safe. A supplement that affects glucose may contribute to unexpectedly low readings when combined with diabetes treatment. Herbs may also alter medicine absorption or processing, and labels do not always reveal every ingredient.
Before using any supplement, show your doctor or pharmacist the exact package, ingredient list, dose, and manufacturer. Do not rely only on the name of the herb. If a product is approved for you, agree on what glucose monitoring and laboratory follow-up are needed.
Common side effects include nausea, abdominal discomfort, and diarrhea. Starting at a low dose, increasing gradually, taking it with food, or using an extended-release version may improve tolerance. Kidney function should be checked, and long-term use can contribute to vitamin B12 deficiency in some people.
Tell your clinician about kidney or liver disease, heavy alcohol use, severe dehydration, vomiting, major infection, upcoming surgery, or contrast imaging. Do not stop metformin because of mild early stomach symptoms without first discussing ways to manage them.
Continue a balanced eating plan with vegetables, protein, healthy fats, and measured portions of high-fiber carbohydrate. Record glucose consistently using a blood sugar log.
Seek prompt medical advice for persistent glucose around 300 mg/dL or higher, excessive thirst, frequent urination, dehydration, blurred vision, or unexplained weight loss. Seek emergency care for vomiting, abdominal pain, difficult breathing, confusion, fainting, high ketones, glucose above 400 mg/dL, or a meter displaying “HI.” Do not use herbs to delay urgent treatment.
Attend the appointment and review your HbA1c before deciding. Metformin is often a useful and well-studied option, but treatment should match your full health profile. Herbal products should not replace prescribed therapy, and combining them with metformin requires an ingredient-specific safety review by your doctor or pharmacist.
Educational safety note: This answer is for general diabetes education only. It does not replace personal medical advice, diagnosis, or treatment. Do not start, stop, or change metformin, another medicine, herbs, supplements, diet, or exercise plans without speaking with your healthcare provider.
Last reviewed: July 2026.