Coriander Water Side Effects: 3 Possible Risks

Coriander water may cause digestive discomfort or an allergic reaction, while a possible effect on blood sugar remains unproven.

Is coriander water safe? Know these 3 potential side effects

Coriander seeds are used as a food spice, but there is little direct research on the safety of drinking them as an infusion. Most importantly, an ordinary food-like preparation is not the same as a concentrated extract or supplement. Visit the coriander water guide for more about the drink.

The three concerns below are not ranked by proven frequency: reliable rates for side effects from coriander water are not available. A person’s medical conditions, medications, allergies and the strength of the preparation may all matter.

In a randomized trial of 60 breastfeeding mothers, researchers reported no adverse effects attributable to a multi-herb tea that contained coriander seeds. That study did not test coriander water alone, so it cannot establish the safety of every coriander seed preparation or identify rare reactions.

Can coriander water upset your stomach?

1. Digestive discomfort

Nausea, stomach discomfort or loose stools could occur after consuming a spice or an ingredient in a drink. Sensitivity to coriander seeds is one possible explanation, but the mechanism and frequency of digestive symptoms specifically from coriander water have not been established.

Other factors can also matter. A drink with several ingredients makes it harder to tell what caused a symptom, and a spoiled infusion can itself be unsafe to consume. Refrigerate an infusion promptly and discard it if it becomes slimy or smells sour.

If you develop discomfort after drinking coriander water, stop drinking it rather than increasing the amount or repeatedly testing it. Note when the symptoms started and what was in the drink; this information may help a clinician assess possible causes.

Evidence strength: Limited. There are no established rates of stomach side effects from coriander water in the evidence reviewed here, and a symptom after drinking it does not prove the seeds caused it.

Can coriander water cause an allergic reaction?

2. Allergic reaction

A person who is allergic to coriander seeds may react when their immune system recognizes proteins from the seeds. Symptoms can include an itchy mouth, hives or swelling. A severe reaction can affect breathing or cause faintness and requires emergency care.

Do not drink coriander water if you know you are allergic to coriander seeds. Straining out the seeds does not make the infusion a reliable way to avoid an allergic reaction, because substances from the seeds can remain in the water.

If you suspect a reaction, stop consuming the drink and contact a healthcare professional. Do not try another serving to confirm the cause; a future reaction can be serious even if an earlier one seemed mild.

Evidence strength: Allergy is a recognized possibility with foods and spices, but the available coriander-water evidence does not establish how often it occurs. The multi-herb tea trial was too small and was not designed to rule out rare allergic reactions to coriander seeds.

Can coriander water lower blood sugar too much?

3. A possible blood sugar effect

Coriander seeds are sometimes discussed in connection with blood sugar, raising a theoretical concern for people who use medicines that lower it. However, it is not established that a typical coriander water infusion lowers blood sugar or interacts with diabetes medication.

Do not use coriander water to manage diabetes or change a prescribed medication because of it. If you have diabetes, particularly if you use insulin or another medicine that can cause low blood sugar, ask your clinician before making the drink a regular habit.

Shakiness, sweating, hunger and a fast heartbeat can be signs of low blood sugar, although they can have other causes. If you have diabetes and notice symptoms, check your blood glucose if possible and follow the low-blood-sugar plan given by your care team.

Evidence strength: The concern is precautionary, not a demonstrated side effect of coriander water. The available trial of a multi-herb tea does not establish a blood sugar effect for coriander seeds or the infusion.

Who should avoid coriander water or ask a clinician first?

People with a known coriander seed allergy should avoid it. Anyone who has had hives, swelling, breathing difficulty or another suspected allergic reaction after coriander seeds should also avoid further exposure until a clinician has assessed the reaction.

People taking diabetes medicines should ask their care team first, especially before drinking coriander water regularly or using a concentrated preparation. The interaction is not established, but monitoring and a personal medication plan are more reliable than assuming an herbal drink is harmless or beneficial.

Pregnant or breastfeeding people should seek individual advice before regular or concentrated use. The small breastfeeding trial is reassuring for the particular multi-herb tea studied, but it does not establish a safe amount of coriander water during pregnancy or breastfeeding. Ordinary culinary use and using an infusion for a health purpose are different situations.

Babies and young children need particular care. Do not give herbal infusions to babies; ask a pediatrician before offering coriander water to an older child, especially as a regular drink. Children have different feeding needs, and an adult recipe ratio is not a pediatric safety recommendation.

Anyone with a medical condition, a history of significant food reactions or concerns about a medication can ask a pharmacist or clinician for advice. Bring a description of the ingredients and how the drink is prepared, since “coriander water” can refer to preparations of different strengths.

How much coriander water is safe to drink daily?

There is no established safe daily limit or medically recommended dose for coriander water. A preparation guideline uses 1 teaspoon (5 mL) of whole or ground spice per 1 liter (about 4¼ cups) of water for an infused drink. The ai infused water generator can help adjust a recipe, but it cannot determine a safe dose for an individual.

That ratio is a flavoring guide, not proof that a particular amount is safe for everyone. It also does not tell you exactly how much of any substance from the coriander seeds enters the water. More seeds or a stronger preparation should not be assumed to provide more benefit.

For food handling, steep the infusion in the refrigerator for 2–4 hours and keep it refrigerated. Drink it within 24 hours for best flavor, and discard it sooner if it becomes cloudy, slimy or sour-smelling. Do not leave it at room temperature for more than a few hours.

If you tolerate coriander seeds in food, that does not guarantee you will tolerate every infusion, particularly a concentrated one. Stop using the drink if symptoms occur, and ask a clinician for advice rather than trying to find a personal limit through repeated exposure.

When should you see a doctor?

Get emergency help immediately for trouble breathing, throat or tongue swelling, fainting, or a rapidly worsening reaction after consuming coriander seeds. If you have a prescribed epinephrine auto-injector, use it as directed and call emergency services; do not wait to see whether symptoms settle.

Seek urgent medical help for severe abdominal pain, persistent vomiting, signs of dehydration, or blood in vomit or stool. If a person with suspected low blood sugar becomes confused, faints or cannot swallow safely, get emergency help and do not give food or drink by mouth.

Contact a clinician for hives or other suspected allergy symptoms, recurring stomach symptoms, or any symptoms that persist or worry you after drinking coriander water. Explain when you drank it, the ingredients and any medicines you take. A clinician can consider other possible causes and advise whether allergy assessment or another evaluation is appropriate.