Updated on - 27 Jan 2026
Coriander seeds, commonly used in cooking and traditional medicines, come from the coriander plant (Coriandrum sativum). These tiny seeds are known for their distinct aroma and flavour. They also offer several health benefits, including helping to improve digestion, manage blood sugar levels and support heart health.
However, coriander seeds can have side effects if consumed in large quantities or if someone is allergic to them. Read on to understand the potential side effects of coriander seeds that you should be aware of.
What are the side effects of coriander seeds?
Coriander seeds are usually safe for most people when consumed in moderation. However, there are some potential side effects you should know about:
1. Allergic reactions
Allergic reactions to coriander seeds can range from mild to severe. They often appear on the skin as hives, rashes, itching or contact dermatitis. Some people experience respiratory symptoms such as sneezing, a runny nose, wheezing or shortness of breath.
Oral and digestive issues are also common and may include swelling of the lips, tongue or mouth, an itchy throat, nausea, vomiting, stomach cramps or diarrhoea. In more widespread reactions, dizziness, light-headedness or joint pain may also occur
2. Low blood pressure
Coriander seeds can have a mild blood-pressure-lowering effect due to their natural compounds and gentle diuretic action. This may be helpful for individuals with high blood pressure, but it can cause problems if your blood pressure is already low or if you are on antihypertensive medication. In such cases, consuming coriander seeds may lead to dizziness, weakness or fainting, so caution is advised.
3. Blood sugar levels
Coriander seeds can help regulate blood sugar levels and benefit people with diabetes. However, if you are on medication to control blood sugar, combining coriander seeds with your treatment could lead to hypoglycemia (low blood sugar). Consult with a healthcare provider before adding coriander seeds to your diet.
4. Digestive issues
For some people, coriander can trigger acid reflux or a burning sensation in the stomach, especially if consumed on an empty stomach or in concentrated forms. You should be cautious if you have sensitive digestion or any other gastric problems, as an excess of coriander leaves can disbalance the natural acid concentration in the gut.
In rare cases, coriander seeds may have a mild laxative effect, leading to loose stools or diarrhoea when taken in large quantities.
5. Liver and kidney health
While small amounts may support normal detoxification, excessive intake can affect liver enzyme activity. This might interfere with how your body processes certain medications.
Overuse also impacts kidney function. The diuretic properties of coriander seeds increase the amount of urine produced by the body, which can lead to dehydration or electrolyte imbalance if continued.
Who should avoid consuming coriander seeds?
While coriander seeds are generally safe, certain groups should be cautious or avoid them altogether:
- People with low blood pressure: Coriander seeds may lower their blood pressure further, leading to dizziness or fatigue.
- Individuals with allergies: Those allergic to spices from the Apiaceae family (like cumin or fennel) may experience skin rashes, itching or swelling.
- Diabetic patients on medication: They can lower blood sugar levels, which may interfere with diabetes medicines.
- Pregnant and breastfeeding women: High doses in herbal form may stimulate uterine contractions or affect milk production.
- People with liver or kidney disorders: Overuse can stress these organs, especially if already weakened.
- Before surgery: Coriander may affect blood sugar control and should be avoided for at least two weeks before any scheduled surgery.
Safe dosage and consumption tips for coriander seeds
Most people can safely consume 1 to 2 teaspoons of coriander seeds per day, either whole, crushed or as a part of regular cooking. This amount is generally well tolerated and provides the flavour and benefits without overwhelming the system.
Coriander seeds can be included in your diet in several ways. You can soak the seeds in water overnight and drink the strained liquid the morning after, include them in your meals as a powder or use them while making herbal tea.
Health benefits of coriander seeds
Some of the main health benefits of coriander seeds include:
- May help lower high blood pressure: They can promote relaxation of blood vessels, helping people with hypertension manage their blood pressure naturally.
- Can support stable blood sugar levels: These seeds may help regulate glucose levels, making them useful for people managing diabetes under medical supervision.
- Aids digestion: Known for soothing the stomach, they can help reduce bloating, acidity and indigestion when consumed in moderate amounts.
- Rich in antioxidants: Their anti-inflammatory and antioxidant compounds may help protect the liver and heart from damage caused by oxidative stress.
- Supports overall wellness: Regular but moderate use of coriander seeds in food or herbal drinks can promote better metabolism and overall digestive balance.
When to consult a doctor for coriander seed side effects
If you experience any usual symptoms after consuming coriander seeds, like rashes or fever, rush to your preferred hospital or clinic immediately.
You should also seek medical advice if you notice consistent drops in blood pressure or blood sugar levels, especially if you are already on medication. People with liver or kidney disorders should speak to a healthcare provider before adding coriander-based supplements or teas to their routine.
If you experience digestive discomfort such as persistent bloating, nausea or diarrhoea more than once or twice, it’s best to pause consumption and discuss your symptoms with a nutritionist or doctor to determine the safe level of intake for your body.
In such cases, a health insurance policy can act as a safety net and financially assist you in the case of immediate hospitalisation and medical expenses. Depending on your medical needs, you can choose from various plans such as individual health insurance, senior citizen health insurance or critical illness insurance. For expert advice, fill out the form provided on this page.
Conclusion
Being aware of how coriander seeds affect your body helps you use them safely and in the right amounts. To do what is best for your body, always consume herbal products like coriander leaves in moderation and consult a healthcare professional before starting a new diet regimen.
Along with mindful consumption, it’s wise to have financial protection in place for unexpected health issues. A health insurance policy can support you during hospitalisation by covering expenses such as room rent, doctor’s fees and surgical charges, depending on your policy terms and the sum insured.
FAQs
1. Can coriander seeds cause hormonal imbalances?
There is limited evidence, but consuming coriander seeds in very high amounts may affect hormone levels because of their mild estrogen-like compounds. It’s best to avoid excessive use, especially if you have a hormonal condition.
2. Are coriander seeds safe for people with thyroid problems?
In moderate amounts, coriander seeds are safe. However, people with hypothyroidism should avoid overuse, as some studies suggest coriander may slightly influence thyroid hormone levels.
3. Can coriander seed water be consumed daily?
Yes, but in moderation. Drinking coriander seed water once daily is generally safe for most people, but long-term daily use should be avoided without a doctor’s advice, especially if you have liver, kidney or blood pressure concerns.
Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis or treatment. Please consult a certified medical and/or nutrition professional for any questions. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.