Celery juice has become increasingly popular among health-conscious consumers. It’s often used to promote hydration, reduce inflammation, and support overall health (1).

However, drinking too much celery juice may cause several negative side effects.

Here are 5 potential side effects of celery juice.

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Celery is high in mannitol, a type of sugar alcohol found naturally in many fruits and vegetables (2).

Mannitol acts as an osmotic agent, meaning that it pulls water into your digestive tract and loosens stools (3).

For this reason, many people report experiencing digestive side effects like diarrhea after drinking celery juice.

Although these side effects typically subside over time, they may be more pronounced among those with underlying conditions, such as irritable bowel syndrome (IBS) (4).

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Celery juice is high in mannitol, which may cause digestive side effects like diarrhea.

Celery juice is relatively high in sodium, with around 189 mg in 1 cup (240 mL) (5).

The U.S. Department of Agriculture (USDA) recommends that adults limit their sodium intake to 2,300 mg per day. As such, drinking several servings of celery juice per day may make it challenging to stay under this amount (6).

Moreover, some studies suggest that high sodium intake contributes to increased blood pressure levels, especially among those who are sensitive to the effects of salt (7).

Thus, those with high blood pressure may need to moderate their intake of celery juice and other sodium-rich foods.

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Celery juice is relatively high in sodium and may increase blood pressure levels among salt-sensitive individuals if consumed in large amounts.

Celery juice is often blended and strained, a process that removes most of the fiber in celery.

Fiber is a beneficial compound found in plant foods that moves through your digestive tract slowly, helping reduce appetite and keep you feeling full (8).

Studies suggest that fiber intake may also aid weight loss and fat loss (9).

If you’re replacing fiber-rich foods in your diet with celery juice, your fiber intake will drop. In turn, this may contribute to increased hunger and appetite.

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Celery juice is low in fiber and may cause increased hunger if you drink it in place of eating fiber-rich foods.

Celery juice is high in vitamin K, a fat-soluble vitamin that plays a key role in blood clotting (5, 10).

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

In particular, people using blood thinners like warfarin are advised to maintain a steady intake of vitamin-k-rich foods rich to ensure that their medications work effectively (11).

This doesn’t mean that you need to eliminate foods high in vitamin K from your diet. Instead, it’s important to consume approximately the same amount of vitamin K per day and avoid sudden changes in your diet (11).

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People using blood thinners like warfarin should maintain a steady intake of foods high in vitamin K, including celery juice, to prevent interactions with their medications.

Celery contains psoralen, a chemical compound found in several types of fruits and vegetables (12, 13).

This compound reacts to sunlight and can cause phytophotodermatitis, an inflammatory condition that leads to blisters and patches on the skin following sun exposure (14).

Older studies and case reports link increased sun sensitivity to an excessive intake of celery or celery juice (15, 16).

However, this reaction usually occurs when foods containing psoralen come into contact with your skin. It’s unlikely to affect those who drink a few servings of celery juice per day.

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Celery contains psoralen, a compound that may cause increased sun sensitivity if consumed in large amounts.

Although celery juice may be a safe and healthy addition to your diet, it may cause several adverse side effects if consumed in high amounts.

In particular, drinking large amounts of celery juice may interact with certain medications, raise your blood pressure levels, increase hunger, and trigger digestive side effects like diarrhea.

Therefore, it’s best to enjoy celery juice as part of a healthy, well-rounded diet and stick to around one or two servings per day.