Too Much Garlic: Side Effects, How Much to Eat, and More (2024)

Eating 1-2 garlic cloves daily can have health benefits, but more can cause bad breath, heartburn, stomach issues, and other unpleasant side effects. It’s best to enjoy it in moderation.

For many home chefs, garlic is a favorite spice to cook with, thanks to its pungent taste and aroma. It works especially well in stews, sauces, pizzas, and pasta dishes.

This powerful ingredient is linked to several health benefits due to its medicinal properties. However, despite its versatility and health benefits, some garlic lovers wonder if it’s possible to go overboard (1).

This article examines the research to determine whether you can eat too much garlic.

Too Much Garlic: Side Effects, How Much to Eat, and More (1)Share on Pinterest

Although garlic is a healthy addition to a balanced diet, eating too much may cause several side effects.

Increased risk of bleeding

One of the most serious side effects of eating too much garlic is an increased risk of bleeding, especially if you’re taking blood thinners or undergoing surgery.

This is because garlic has antithrombotic properties, meaning that it may prevent blood clots from forming (2).

Although garlic-induced bleeding is uncommon, one report detailed a case in which a person experienced increased bleeding after they regularly ate 12 grams of garlic — approximately 4 cloves — per day before surgery (3).

In another case study, a person experienced excessive discoloration and bruising after surgery. The possible cause was a dietary supplement the person had been taking, which contained fish oil and 10 mg of garlic concentrate, both of which affect blood clot formation (4).

Thus, it’s important to talk with your healthcare professional before using garlic supplements. If you’re taking any medications or set to have surgery, you should also consult a healthcare professional before adding garlic to your diet.

Garlic breath

Garlic contains a variety of sulfur compounds, which are often credited with its many health benefits (1).

However, these compounds may cause bad breath, especially when eaten in large amounts. This is especially true for raw garlic, as cooking decreases the content of these beneficial sulfur compounds (5, 6).

Still, you can try several home remedies to get rid of garlic breath.

Digestive issues

Like onions, leeks, and asparagus, garlic is high in fructans, a type of carb that may cause bloating, gas, and stomach pain in some people (7).

In fact, when those with a fructan intolerance eat a high fructan food, it isn’t fully absorbed in the small intestine. Instead, it travels to the colon intact and is fermented in your gut, a process that may contribute to digestive issues (7).

As such, people following a low FODMAP diet — an elimination diet intended to identify specific foods that trigger digestive issues — are often encouraged to limit their garlic intake (8).

Heartburn

If you have gastroesophageal reflux disease (GERD), you may want to consider lowering your garlic intake.

GERD is a common condition that occurs when stomach acid flows back up into your esophagus, causing symptoms like heartburn and nausea (9).

Garlic may decrease lower esophageal sphincter (LES) tone, which is the ability of the muscles at the bottom of your esophagus to close and prevent acid from entering. In turn, this may trigger acid reflux (10).

However, certain foods affect people with GERD differently. If you find that eating a lot of garlic doesn’t cause symptoms, it’s likely unnecessary to limit your intake (11).

Summary

Eating large amounts of garlic may cause garlic breath, digestive issues, and heartburn. In rare instances, it may increase your risk of bleeding, particularly during surgery or if you’re taking blood thinners.

Although no official recommendations exist for how much garlic you should eat, studies show that eating 1–2 cloves (3–6 grams) per day may have health benefits (1).

If you notice any side effects after eating more than this amount, consider reducing your intake.

Cooking garlic before eating it may also help prevent side effects like garlic breath, digestive issues, and acid reflux (11).

If you have any underlying health conditions or are taking medications, it’s best to talk with your doctor before making any changes to your diet or using any herbal supplements.

Summary

Although there are no official guidelines for how much garlic is too much, it’s best to stick to a few cloves per day and decrease your intake if you notice any side effects. Cooking it may also help prevent side effects.

Garlic is highly nutritious and associated with a variety of health benefits.

However, if you eat too much of it, it may cause side effects like bad breath, acid reflux, digestive issues, and an increased risk of bleeding.

Therefore, it’s best to enjoy this delicious spice in moderation and reduce your intake if you start to experience any adverse effects.

Just one thing

Try this today: If you can’t tolerate garlic, there are plenty of tasty garlic substitutes you can use. Try experimenting with other herbs and spices, such as peppercorn, fennel, horseradish, or ginger.

Too Much Garlic: Side Effects, How Much to Eat, and More (2024)

FAQs

Too Much Garlic: Side Effects, How Much to Eat, and More? ›

Eating 1-2 garlic cloves daily can have health benefits, but more can cause bad breath, heartburn, stomach issues, and other unpleasant side effects. It's best to enjoy it in moderation. For many home chefs, garlic is a favorite spice to cook with, thanks to its pungent taste and aroma.

What should I eat if I had too much garlic? ›

If you're having a particularly garlic-heavy meal, eat apples for dessert or chew on fresh mint leaves. One study indicated that the chemical makeup of raw or heated apples, lettuce, and mint helped deodorize garlic breath. Hot green tea and lemon juice may also help.

Is there a limit to how much garlic you can eat? ›

You shouldn't add too much garlic to your diet, too quickly. "One to two cloves a day should be the maximum consumed by anyone," says Tracey Brigman, a food and nutrition expert at the University of Georgia. Eating more than that may cause upset stomach, diarrhea, bloating, or bad breath.

How much garlic per day is safe? ›

Dosages generally recommended in the literature for adults are 4 g (one to two cloves) of raw garlic per day, one 300-mg dried garlic powder tablet (standardized to 1.3 percent alliin or 0.6 percent allicin yield) two to three times per day, or 7.2 g of aged garlic extract per day.

What should I drink after eating too much garlic? ›

Researchers also found that lemon juice and raw apples are equally excellent antidotes, but there's a catch. For the most effective solution, it's best to use the remedy along right when you're eating the garlic.

How do I counteract too much garlic? ›

The solution: fix too much garlic with a little acidity and sweetness. What we do recommend is our go-to method for mellowing the overly garlicky taste of pesto: adding a touch of acidity and sweetness. Acid (normally in the form of lemon juice or vinegar) denatures allicin, the source of garlic's spiciness.

How to neutralize garlic in the stomach? ›

Drink milk. Milk contains fat molecules that can help neutralize sulfur compounds in garlic and reduce bad breath. It's soothing for your stomach after a heavy meal. You can pour yourself a glass of milk and enjoy its refreshing taste while combating garlic breath.

What is the 10 minute garlic rule? ›

The "10-minute rule" for using garlic effectively involves allowing chopped or crushed garlic to sit for about 10 minutes before cooking or consuming it.

How do you know if you ate too much garlic? ›

Any time you consume more than a serving size of any food, you may be more likely to experience side effects. The most common symptoms of overeating garlic include body odor and breath that smells like garlic.

How much garlic is excess? ›

Overconsumption of garlic by eating more than 3-4 cloves daily on a regular basis can result in undesirable digestive side effects for many people, including abdominal pain, heartburn, bloating, gas, diarrhea or nausea.

Is it safe to take 1000mg of garlic a day? ›

Dosing. Suggested average daily doses include 2 to 5 g of fresh raw garlic; 0.4 to 1.2 g of dried garlic powder; 2 to 5 mg of garlic oil; 300 to 1,000 mg of garlic extract (as solid material); and 2,400 mg/day of aged garlic extract (liquid).

Can I eat garlic 2 times a day? ›

Eating 1–2 cloves of raw garlic per day may be beneficial. In supplement form, doses of up to 3,600 mg of aged garlic extract per day have been shown to be effective.

What is the healthiest way to eat garlic? ›

To experience these benefits, simply eat a few cloves of raw garlic with a glass of water in the morning. “Allicin gets diluted when cooked, so the ideal way to ingest garlic is to eat it raw and on an empty stomach,” says Dr Prasad.

How long does garlic stay in your bloodstream? ›

The water-soluble compounds in garlic only remain in your body for 2-3 days, but the fat-soluble compounds in garlic may remain in your body for multiple weeks.

Can you throw up from eating too much garlic? ›

Share on Pinterest A garlic allergy may cause symptoms such as stomach cramping and vomiting. An allergy occurs when the body comes into contact with a foreign substance and overreacts, releasing inflammatory immune cells. These reactions can range from mild to severe.

Can too much garlic damage the liver? ›

1.0, 2.5 and 5.0 g/kg body weight/day of garlic showed significant (P<0.001) deterioration in liver function tests (LFT's) after 21, 14 and 7 days respectively. A 1.0 g/kg body weight/day dose of garlic was associated with marked histological damage in liver after 21 days.

How can I reduce the effects of garlic? ›

Cooking garlic before eating it may also help prevent side effects like garlic breath, digestive issues, and acid reflux ( 11 ).

How to stop stomach pain after eating garlic? ›

If you have a food intolerance to garlic, your doctor may recommend that you stop eating it. They may also suggest medications, such as over-the-counter antacids, to help with your symptoms.

What if I ate a lot of garlic? ›

Also, having a large amount of garlic at once may give you a burning sensation inside the mouth, heartburn, gases, and loose bowel movements. Raw garlic has anti-inflammatory, antioxidative, antibacterial, and anticancer properties.

How long does garlic stay in your system? ›

Science Of Stink: Blame Sulfur Compounds For Your Garlic Breath : The Salt A sulfur compound in garlic can linger in the body for up to two days, stinking up your breath, sweat and pee. Milk, parsley or citrus might help break it down more quickly or mask the stench.

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