Side effects of celery

Celery, also known as stalk celery, belongs to the Apiaceae family, which also includes carrots, parsnips, parsley, and celeriac.

Its crisp stalks have made it a popular low-calorie snack, and it may offer a range of health benefits.

Celery juice has gained popularity among health-conscious consumers and is often used to promote hydration, reduce inflammation, and support overall health.

Celery is also rich in apigenin, a plant compound linked to several potential health effects.

However, consuming excessive amounts of celery can also lead to side effects.

Let’s take a closer look at the potential side effects of celery and especially celery juice.

1. Digestive Side Effects

Celery contains a significant amount of mannitol, a sugar alcohol naturally found in many fruits and vegetables.

Mannitol acts as an osmotic agent, meaning it draws water into the intestines and helps soften stool. (1)

Because of this, many people report digestive side effects, such as diarrhea, after consuming celery.

While these effects often subside over time, they may be more pronounced in people with underlying conditions like Irritable Bowel Syndrome (IBS). (2)

2. Effects on the Kidneys

Celery is high in water content and acts as a natural diuretic.

People with kidney issues should monitor their celery intake, as excessive consumption may stress the kidneys.

If you’re concerned about your kidney health, speak to your doctor before increasing your celery intake.

3. Interactions with Medications

Celery juice contains a high amount of vitamin K, a fat-soluble vitamin essential for blood clotting. (1)

While this isn’t a concern for most people, those taking certain medications may need to monitor their vitamin K intake carefully.

Especially individuals on blood-thinning medications, such as warfarin, are advised to maintain a consistent intake of vitamin K to ensure their medication works effectively. (2)

This doesn’t mean you should eliminate foods high in vitamin K, but rather aim for consistent daily intake and avoid sudden dietary changes. (3)

Celery may also lower blood pressure.
Using it together with blood pressure medication may lead to excessive blood pressure reduction. (4)

Additionally, celery may affect drugs metabolized by the liver – particularly CYP1A2 enzyme substrates.

The liver breaks down many medications, and celery may slow this breakdown, potentially increasing the effect or side effects of certain drugs.

If you’re taking any medications that are processed by the liver, consult a healthcare provider before regularly consuming celery. (5)

4. Celery May Increase Sensitivity to Sunlight

Celery contains several compounds called furanocoumarins.

These chemicals can cause photosensitivity, or an increased sensitivity to bright light—especially sunlight.

This reaction is typically associated with intensive handling of celery, such as in agricultural work.

However, according to Dermanet New Zealand, even consuming these compounds through something like celery soup can occasionally cause severe sunburn if you go out into the sun or tanning beds shortly afterward. (1)

5. Celery During Pregnancy

Celery oil and celery seeds are likely unsafe when taken in medicinal amounts during pregnancy.

Large amounts of celery may stimulate uterine contractions and could lead to miscarriage. (1)

Therefore, it’s best to stick to small, culinary amounts during pregnancy.

Whole Celery vs. Celery Juice

Celery is a versatile vegetable that can be enjoyed either whole or juiced.

The table below compares whole celery vs. celery juice, so you can decide which form works best for you.

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