Health Benefits of Sage Leaves: Types, Uses, and Potential Side Effects

Sage leaves, a staple herb in many cuisines, offer a plethora of health benefits beyond their flavourful contribution to dishes. From supporting brain function to aiding in blood sugar control, the versatility of sage leaves makes them a valuable addition to your diet and health regimen. Let’s embark on a journey to discover the various types, uses, and potential side effects of this remarkable herb.

What is Sage?

Sage, scientifically known as Salvia officinalis, is a perennial herb that belongs to the mint family. Commonly referred to as common sage, garden sage, or simply sage, this herb is renowned for its strong aroma and earthy flavour, making it a popular ingredient in various culinary traditions across the globe. Sage is a powerhouse of antioxidants, boasting over 160 distinct polyphenols, and contains beneficial compounds such as caffeic acid, chlorogenic acid, rosmarinic acid, ellagic acid, and rutin. These compounds work synergistically to contribute to the numerous health benefits associated with sage leaves. In the following sections, we will delve deeper into the different types of sage and their specific uses.

Health Benefits of Sage Leaves

Here are a few health benefits of using sage leaves:

1. Boost Memory And Cognition

Sage leaves have been shown to enhance cognitive function and memory. This is attributed to sage’s effect on acetylcholine, a neurotransmitter in the brain that plays a crucial role in memory and cognitive functions.

2. Combat Skin Ageing

Sage contains compounds that may help combat skin ageing. Test-tube studies suggest that sage’s antioxidant properties, particularly from its polyphenols like rosmarinic acid and ellagic acid, can help reduce signs of ageing such as wrinkles. These compounds have been shown to relax and protect the skin, potentially reducing the visible effects of ageing.

3. Promote Hair Growth

While there is limited direct research on sage promoting hair growth, its antioxidant and anti-inflammatory properties could indirectly support hair health. The presence of vitamins and minerals like vitamin K, magnesium, and zinc in sage can contribute to overall health, including potentially benefiting hair growth. However, more specific studies are needed to confirm this benefit.

4. Lower Cholesterol Levels

Consuming sage tea has been linked to improved cholesterol profiles. Studies have shown that drinking sage tea twice daily can lower “bad” LDL cholesterol and total blood cholesterol while raising “good” HDL cholesterol levels. This effect is attributed to the antioxidant and polyphenolic compounds in sage, such as chlorogenic acid and rosmarinic acid.

5. Aid Diabetes Treatment

Sage leaves have traditionally been used to treat diabetes, and some studies support this use. Sage extract has been shown to lower blood glucose levels and improve insulin sensitivity in both animal and human studies. It works by activating receptors that help clear excess fatty acids from the bloodstream, thereby improving insulin function.

6. Control Menopausal Symptoms

Sage has been used to reduce symptoms associated with menopause, particularly hot flashes and excessive sweating. Studies have found that sage supplements can significantly reduce the frequency of hot flashes due to its oestrogen-like properties, which bind to certain receptors in the brain and ease these symptoms.

7. Aid Weight Loss

There is no direct, substantial evidence that sage specifically aids in weight loss. However, its potential to lower blood sugar and cholesterol levels, along with its general health benefits, could contribute to an overall healthier metabolism. More research is needed to establish any direct link between sage consumption and weight loss.

8. Improve Oral Health

Sage has antimicrobial properties that can help improve oral health. It has been shown to kill cavity-causing bacteria like Streptococcus mutans and the fungus Candida albicans. Sage-based mouthwashes have also been effective in reducing dental plaque and treating other oral health issues.

9. Reduce Cancer Risk

Animal and test-tube studies suggest that compounds in sage may have anti-cancer effects. These studies indicate that sage extracts can suppress the growth of cancer cells and stimulate cell death. While the evidence is promising, human studies are necessary to confirm whether sage is effective in reducing cancer risk in humans.

Uses of Sage Leaves

Sage leaves are incredibly versatile, offering a wide range of applications that span culinary, medicinal, and aromatherapeutic domains. Let’s explore the various ways in which you can incorporate sage into your daily life, starting with its culinary uses.

1. Culinary Uses

In the culinary world, sage is a beloved herb that adds a distinctive, earthy flavour to various dishes. Its strong aroma and taste make it an ideal complement to meats, particularly poultry and pork. Sage is also commonly used to enhance the flavour of soups, stews, and vegetable dishes, either in its fresh or dried form. Traditional recipes like stuffing for turkey and sage butter for pasta showcase the herb’s versatility in the kitchen.

2. Medicinal Uses

Beyond its culinary applications, sage leaves offer numerous medicinal benefits. Rich in antioxidants, sage has been shown to improve cognitive function, especially in individuals with Alzheimer’s disease. It is also used to alleviate symptoms of menopause, such as hot flashes and night sweats. Additionally, sage may help lower blood sugar and cholesterol levels. Its antimicrobial properties make it beneficial for oral health, as it can reduce plaque and kill harmful bacteria like Streptococcus mutans and Candida albicans.

3. Aromatherapy and Essential Oils

Sage essential oil is highly valued in aromatherapy for its ability to promote mental clarity and alertness. Inhaling sage oil may help improve memory and attention while reducing feelings of anxiety and stress. However, caution should be exercised when using sage oil due to the potential presence of thujone, which can be harmful in high doses. When used responsibly, sage oil can be a valuable tool in managing stress and promoting overall well-being.

4. Sage in Home Remedies

The antimicrobial and anti-inflammatory properties of sage leaves make them useful in various home remedies. Topical application of sage can help treat cold sores, gum disease, and sore throats. A sage-based mouthwash can be effective in killing cavity-causing bacteria, while a cream containing sage and rhubarb may be as effective as acyclovir cream in treating cold sores. Additionally, sage can be used to reduce inflammation in the gums and alleviate symptoms of sunburn.

How to Use Sage Leaves

There are several ways to incorporate sage leaves into your daily life:

• Add fresh or dried sage to your cooking, particularly when preparing meats, soups, and stews.
• Steep dried or fresh sage leaves in hot water to make a tea that may help lower cholesterol and improve cognitive function.
• Take sage leaf extract in capsule or tablet form, following the recommended dosage, to manage menopause symptoms or improve blood sugar control.
• Use sage essential oil in a diffuser or apply it topically (after diluting with a carrier oil) to benefit from its mental clarity and anti-stress effects.
• Apply sage-based creams or ointments to treat cold sores, gum disease, or sunburn.
• Mix sage leaves with water to create a mouthwash that helps kill bacteria and reduce plaque.

Sage Leaves Side Effects

While sage leaves offer numerous health benefits, it is essential to be aware of potential side effects, especially when consumed in large quantities or over an extended period.

Sage contains a chemical called thujone, which can be toxic in high doses and may lead to seizures, liver damage, and nervous system problems. Furthermore, sage might lower blood pressure, which could be problematic when combined with antihypertensive medications. It may also interfere with blood sugar control during and after surgery, so it should be stopped at least two weeks before any scheduled procedure. Individuals with seizure disorders should avoid taking sage in amounts higher than those typically found in food.

Although generally safe for topical application, sage can cause skin irritation if applied for more than a week, and its essential oil should be used cautiously in aromatherapy. Additionally, sage may interact with medications that are metabolised by the liver, such as those involved in the cytochrome P450 3A4 pathway, and could alter their effects and side effects.

Despite these potential drawbacks, sage leaves remain a valuable addition to a healthy diet when consumed in moderation.

Conclusion

Sage leaves are a versatile and nutritious herb that offers a wide range of health benefits, from their potent antioxidant properties to their potential for supporting cognitive function and improving blood sugar and cholesterol levels. However, it is crucial to consume sage responsibly and be aware of its potential side effects, particularly those associated with high thujone content and interactions with certain medications. By using sage in moderation and seeking guidance from healthcare professionals when necessary, individuals can safely incorporate this beneficial herb into their diet and enjoy its many advantages while minimising any associated risks.

Frequently Asked Questions (FAQ)

References

1. https://www.healthline.com/nutrition/sage
2. https://www.medicalnewstoday.com/articles/266480#benefits
3. https://www.stylecraze.com/articles/amazing-benefits-of-sage-herb-for-skin-hair-and-health/