8 Side Effects Of Apple Cider Vinegar & How To Use It Safely

Keep your intake down a notch; as excessive consumption may prove to be harmful.

Medically reviewed by Staci Gulbin, RD, LDN
Written by Sindhu Koganti, Certified Health & Nutrition Life Coach
Edited by Ravi Teja Tadimalla, Professional Certificate In Food, Nutrition & Health
Fact-checked by Himanshi Mahajan, Certified Health & Nutrition Life Coach  • 

Fermentation of apple juice with lactic acid bacteria and yeast are used to make apple cider vinegar (1). Consumption of this healthy tonic at moderate levels has many potential health benefits and is also used as a natural remedy to manage several skin and hair issues. But are there any side effects of apple cider vinegar with excess consumption? Yes, and these may include digestive issues, gastrointestinal problems, hypokalemia (low potassium levels), and tooth decay.

This article explores the possible side effects of apple cider vinegar, the consequences of excess intake, and safer ways of intake. Keep reading.

protip_icon Know The Flip Side: Apple Cider Vinegar

Short-Term Effects
May cause nausea and skin and throat burn.

Long-Term Effects
May severely lower blood sugar and potassium levels and cause tooth decay.

Drug Interactions
May interact with diuretics, laxatives, and diabetes and blood pressure medications.

When To See A Doctor
If you experience very low potassium and blood sugar levels (especially if you have diabetes).

Side Effects Of Apple Cider Vinegar

1. May Cause Gastrointestinal Issues

Apple cider vinegar may cause gastrointestinal issues
Image: Shutterstock

Excess consumption of apple cider vinegar may cause gastrointestinal issues. It may slow down the process of absorption of food in the bloodstream. A study conducted by Lund University found that apple cider vinegar delayed the gastric emptying rate (2). Though this could be beneficial in some cases, it can cause digestion issues in some individuals.

Increased intake of apple cider vinegar may also worsen symptoms of gastroparesis, a common condition in people with type 1 diabetes (3). However, more studies in this line are needed to reach further conclusions.

2. May Cause Digestive Problems

Apple cider vinegar may cause digestive issues
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Apple cider vinegar may help reduce appetite. A study shows that apple cider vinegar acts as an appetite suppressant and promotes feelings of fullness, leading to a natural reduction in food intake. Though this could help with detoxification and weight loss, the vinegar can cause subsequent nausea (4).

However, more studies are needed to further understand this side effect of apple cider vinegar.

3. May Cause Hypokalemia

Anecdotal evidence suggests that excessive use of apple cider vinegar may lower the potassium levels in the body. It may also reduce bone mineral density, which, in turn, makes bones brittle. Hence, individuals with osteoporosis may have to reduce or avoid the intake of apple cider vinegar.

A case of hypokalemia was observed in a 28-year-old woman who had reportedly taken 250 ml of ACV regularly for 6 years (5). More research is needed in this regard.

4. May Cause Tooth Decay

Apple cider vinegar may cause tooth decay
Image: Shutterstock

The high acidity of undiluted apple cider vinegar can damage your tooth enamel if consumed in excess. Besides giving a yellowish tinge to your teeth, the vinegar may also increase your dental sensitivity.

A study states that apple cider vinegar may have an erosive potential that may cause tooth decay (6). Another study states the case of a 15-year-old girl who had experienced tooth erosion following the daily intake of apple cider vinegar (7).

5. May Cause Throat Burns

Increased consumption of apple cider vinegar may cause throat burns. Many studies have concluded that the oral overuse of apple cider vinegar can eventually lead to throat irritation. The acetic acid in the vinegar could be the primary cause (8).

A study conducted by the University of Arkansas found that apple cider vinegar tablets may also lead to esophageal injury (8). It is a potent caustic substance, and accidental ingestion of vinegar may lead to esophageal lesions in children (9).

6. May Cause Skin Burns

Apple cider vinegar may cause skin burns if directly applied to the skin
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The strong acidic nature of apple cider vinegar may cause skin burns. Applying apple cider vinegar directly to the skin can cause burns and irritation, especially if the vinegar is undiluted.

In a study, a 14-year-old girl developed burns on her nose after applying several drops of apple cider vinegar to remove two moles (10). There are several other anecdotal studies that suggest that apple cider vinegar causes skin burns.

protip_icon Quick Tip
Additionally, avoid combining it with other harsh topical substances like salicylic acid or benzoyl peroxide if you have sensitive skin. It may cause an unpleasant, irritated reaction.

7. May Interact with Certain Drugs

There is no sufficient information available in this regard. Since it is acidic, apple cider vinegar may easily react with some drugs including laxatives and diuretics.

Apple cider vinegar may have a direct effect on insulin levels and blood sugar. Taking it along with blood pressure and diabetes medications may cause harm. However, more studies in this line are needed to reach further conclusions. If you are on any medication, consult your doctor before taking apple cider vinegar.

8. May Cause Low Blood Sugar Levels

Apple cider vinegar may cause low blood sugar levels
Image: Shutterstock

The excessive use of apple cider vinegar may lower blood-sugar levels. The vinegar has an anti-glycemic effect (5), (11). However, taking it along with diabetes medications may cause your blood sugar levels to drop way too low. This, if not treated, may lead to unconsciousness and even coma. More research is needed to further understand this phenomenon.

Apple cider vinegar is also not advised for pregnant/lactating women and those undergoing chemotherapy treatment. It may cause complications. However, there is insufficient information in this regard.

These are the potential adverse effects of apple cider vinegar. Most of these need further research to be thoroughly validated. However, this does not mean one must totally avoid ACV. There is a way to consume it by minimizing the risk of side effects.

How To Consume Apple Cider Vinegar Safely

The intake of excess and undiluted apple cider vinegar daily may cause possible adverse effects.

To minimize these effects, you can try:

  • Diluting the apple cider vinegar with water.
  • Reducing the quantity of vinegar intake.
  • Limiting contact with the teeth by drinking vinegar through a straw.
  • Reducing the amount of time vinegar touches the skin.
  • Rinsing your mouth with water after consumption to prevent further damage to the teeth.

protip_icon Quick Tip
You can also combine ACV with other liquids like fruit juice or tea for a different flavor.

You can also ensure you consume ACV in the recommended doses to potentially avoid side effects.


The recommended dose of apple cider vinegar varies depending on your individual needs. However, a daily intake of 15 ml of apple cider vinegar is enough to enjoy its potential health benefits (12).

Before you apply apple cider vinegar to your skin, dilute it with water. Also, do a patch test.

Apple cider vinegar has been lauded for its many health benefits in recent years. However, it may prove to be harmful if consumed in excessive amounts. The side effects of apple cider vinegar range from increased risk of osteoporosis to dental problems. Furthermore, it may cause gastrointestinal and digestive issues. In some cases, apple cider vinegar may trigger allergic reactions or interfere with the functioning of certain medications, especially diuretics and those for diabetes. Therefore, it is advised that you only consume ACV as directed by your doctor.

Frequently Asked Questions

Does apple cider vinegar make you sleepy?

There is a lack of scientific evidence to suggest that apple cider vinegar (ACV) makes you sleepy.

Is apple cider good for the bladder?

There is a lack of scientific evidence to suggest that ACV is good for your bladder or the urinary system.

Is apple cider vinegar good for high blood pressure?

Possibly. Studies have shown that the acetic acid in apple cider vinegar can help lower blood pressure levels in hypertensive rats (14).

Is apple cider vinegar good for arthritis?

There is a lack of scientific evidence suggesting that ACV is good for relieving arthritis.

Is apple cider vinegar good for your cholesterol?

Possibly. A study showed that consumption of ACV may reduce total cholesterol levels (15).

Key Takeaways

  • The side effects of ACV include gastrointestinal issues, digestive problems, hypokalemia, and tooth decay.
  • It may also cause throat and skin burns and low blood sugar levels and react with some medications.
  • A daily intake of just 15 ml of ACV is recommended to gain its benefits.

Discover the surprising truth about apple cider vinegar! Before you reach for that bottle, watch this eye-opening video to learn which conditions may make it a risky choice for you.


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