Introduction

For generations, garlic has been a staple item in kitchens worldwide. Due to its antibacterial and antiseptic qualities, this herb provides both therapeutic and medical benefits. The health benefits found in garlic are attributed to a substance called allicin, which is known to be abundant in minerals including magnesium, zinc, potassium, and phosphorus.⁷ Allicin is garlic's most researched active component and antioxidant.⁵ Garlic is also a rich source of vitamins C, K, folate, niacin, and thiamine.⁷

Traditionally, dating back thousands of years, herbs like garlic have been - utilised not only whilst cooking but also for medicinal purposes and as dietary supplements. Individuals have used garlic as a complementary or alternative medicine for various diseases, even though the herb's efficacy varies.⁵

Overview of digestive health

Our digestive system performs a vital role in our body’s digestion. In addition to this, it also greatly affects our immune system, mental health, and general well-being. However, our gut health is in danger due to our fast-food consumption and sedentary lifestyles, and digestive health concerns are on the rise with individuals experiencing a variety of digestive health concerns, such as bloating, constipation, and irritable bowel syndrome.

Nutrition is just as important for maintaining a healthy digestive system as leading an active lifestyle, which can greatly improve digestive health. Ayurvedic treatments, which are based on the ancient Indian medical system which promotes both a natural and holistic course to health, can also be included in our daily regimen to help with digestion.^4,8

Nutritional composition of garlic

Although garlic may appear small in size, it contains a wide variety of nutrients and chemicals, making it a suitable addition to cuisines for medicinal purposes.

According to research, whilst organosulfur compounds (protein, fibre, amino acids, and water are present in garlic cloves, carbohydrates make up a large majority of their composition. Fructose polymers, or fructans, make up the bulk of the carbohydrates in garlic. Even though fructans' health advantages are still being researched, many scientists view them as "health-promoting food ingredients".³

Garlic has a lot of nutrients. Three grams, or one clove of raw garlic contains:

• Manganese IV (B6)
• Vitamin C
• Selenium 
• Fibre 
• Contents of iron, calcium, copper, potassium, etc⁷

Mechanism of action

Garlic has large amounts of sulfur-containing chemicals such as diallyl disulfide and allicin., This gives it its anti-inflammatory qualities. These substances have been demonstrated to lessen intestinal inflammation by preventing the synthesis of pro-inflammatory chemicals. Intestinal illnesses like Inflammatory Bowel Diseases (IBD) and Irritable Bowel Syndrome (IBS) can benefit from these additional herbal alternatives to prevent and relieve symptoms.⁶

Because of its inherent antibacterial and antifungal qualities, garlic can combat dangerous germs in the digestive system. Research indicates that garlic can prevent the growth of dangerous bacteria and fungi,^6,10 including Salmonella and E. Coli, as well as Candida. The antimicrobial properties of garlic can aid in maintaining a balanced population of beneficial bacteria in the stomach, which is crucial for gut health.

Garlic's strong antioxidant content, including that of vitamin C and selenium, contributes to its immune-boosting qualities. These antioxidants aid in shielding the body from the damaging effects of free radicals and oxidative stress, both of which can impair immunity. In addition, substances found in garlic can increase the development of white blood cells, which are in charge of battling infections and other pathogens in the gastrointestinal tract.⁶

Health benefits

Optimal for heart health

Garlic benefits heart health in the following ways:

• Allicin prevents LDL (bad cholesterol) from oxidising, lowering cholesterol and enhancing heart health. Garlic has been highlighted to lower blood clot occurrence, which helps avoid thromboembolisms
• Garlic can also reduce blood pressure

Enhances cognitive performance

Garlic’s anti-inflammatory and antioxidant properties are documented to support brain health and work well against dementia and other neurological illnesses.

Enhances metabolism

Adding raw garlic to one's diet helps with digestive issues. Not only does it lessen inflammation but it is good for the gut. Raw garlic is beneficial in preserving healthy bacteria in the stomach whilst eliminating harmful ones.

Maintains blood sugar balance

Diabetic individuals and researchers have noted that garlic affects blood sugar levels, with reports highlighting that it lowers it.^9,7

Increasing immunity

Garlic works against DNA deterioration and free radical damage, its zinc component helps strengthen the immune system whilst the vitamin C in garlic aids in infection prevention. Therefore, garlic’s antibacterial properties make it beneficial in fighting against both ear and eye infections.⁷

Prevents acid reflux and cancer

Garlic has a high antioxidant content, which helps the body fight against some cancers, including the stomach, liver, prostate, lung, and colon. Garlic's antibacterial properties help to prevent peptic ulcers by removing microorganisms from the digestive tract.

Beneficial for losing weight

Garlic inhibits gene expression involved in the development of fat-storing adipose cells. It also raises the body's thermogenesis, which burns fat faster and lowers LDL (bad cholesterol).

Prevents heart attacks 

It's also thought that garlic can lessen how sticky the platelets in your blood are. These platelets control the blood clotting mechanism in your body. Consuming garlic can help decrease the excessive clotting effect of your platelets. As a result, it may prevent clots in and around your heart, preventing heart attacks.⁷

How to incorporate garlic into your diet

Garlic milk

• Crush 5g of garlic into 50 ml of water and 50 ml of milk 
• Mix the water and garlic paste
• Reduce the volume to 50 ml by boiling
• After meals, strain and sip 10 ml twice a day⁴

Roasted veggies with garlic

Mix your preferred vegetables with salt, olive oil, and garlic; bake until soft and crispy.

Herb-and-garlic chicken

Garlic, herbs, and lemon juice can be introduced into the chicken breast’s marinade. They can then be baked or grilled until cooked thoroughly.

Stir-fried ginger and garlic

For a quick and healthful dinner, stir-fry your favourite vegetables with garlic, ginger, and soy sauce.⁶

Precautions and side effects

While most individuals can safely consume garlic, excessive amounts may have negative effects. Notable ones included digestive problems, allergic reactions, and foul breath. Additionally, antibiotics and blood thinners are two drugs that may interact with garlic. Thus, it is advised to use garlic sparingly and speak with a doctor before beginning any new dietary supplement regimen.⁶

FAQs

How does garlic aid gut health?

The good news is that garlic is a naturally occurring prebiotic; but, like with many nutrients, its benefits increase with cooking time.¹

Allergy Reactions and Intolerance to Garlic

If you have not been diagnosed with fructose intolerance or IBS, you might have a garlic intolerance or allergy. The phrases "allergy" and "intolerance" are frequently used interchangeably. Both are, after all, physiological responses to particular diets.²

When using garlic, which medications and foods should I stay away from?

When consuming garlic, stay away from vitamin E and fish oil.

Garlic should not be taken with herbal or nutritional supplements that interfere with blood coagulation. These include horse chestnut, Panax ginseng, poplar, red clover, turmeric, willow, angelica (dong quai), capsicum, clove, danshen, ginger, and ginkgo.⁵

Can I ingest garlic if I'm nursing a baby or pregnant?

If you are pregnant or nursing, see a physician before taking garlic. Garlic is generally considered safe to use as a seasoning in cuisine whilst pregnant.⁵

Can you apply garlic to your face?

Products containing garlic, such as pastes and gels, may be safe. But garlic could result in burn-like skin injury. Applying raw garlic, in particular, to the skin may irritate it severely.

Who should avoid taking garlic?

Garlic should not be taken in excess when pregnant or nursing. Children can take up to 300 mg of garlic three times a day for up to eight weeks. Garlic should not be taken by those who have bleeding disorders or those undergoing surgery, as it can prolong bleeding time and affect blood pressure. Garlic should be avoided two weeks before surgery because it may also lower blood sugar levels.

What negative effects does garlic have?

Garlic is safe to consume in most cases. Adverse reactions may include heartburn, flatulence, diarrhoea, and foul breath. The adverse effects are frequently stronger and might raise bleeding risk as well as trigger allergic reactions in certain individuals when raw garlic is consumed by mouth.⁷

Summary

In conclusion, garlic's anti-inflammatory qualities, capacity to combat dangerous bacteria in the gut, and immune-stimulating capabilities all contribute to improved gut health. You can lower your risk of digestive diseases and enhance your overall digestive health by including garlic in your diet.

Consider using fresh garlic in your cooking or supplementing with garlic to include it in a healthy diet. Garlic is a versatile ingredient that may be used in a multitude of recipes, such as stir-fries, soups, stews, sauces, and marinades.

But it's crucial to use garlic sparingly and to be mindful of any possible drug interactions and adverse effects. It is advised to speak with a healthcare provider before beginning any new dietary supplement.⁶

There is great promise for garlic as a home cure to assist the digestive system. It’s abundant in bioactive compound content, like allicin, and has anti-inflammatory, antibacterial, and antioxidant properties that benefit gastrointestinal health. Research has indicated that garlic can effectively relieve symptoms associated with a range of digestive illnesses, including but not limited to dyspepsia, gastritis, and irritable bowel syndrome. Nonetheless, to completely comprehend its methods of action and the ideal dosage for therapeutic application, more research is necessary. Despite the possible advantages, people especially those who already take medicine or have medical conditions should speak with healthcare providers before adding garlic supplements to their regimen.