We have five factories and 19 years of experience in plant extracts
  • 0086-571-85302990
  • sales@greenskybio.com

Technical Articles

We hold regular seminars and welcome inquiries if you have any questions

Let's talk

citrus bioflavonoides


1. Chemical Composition and Structure

1. Chemical Composition and Structure

Citrus bioflavonoids, a diverse group of plant-derived compounds, are characterized by their unique chemical structures and wide-ranging health benefits. These compounds are a subset of a larger class of plant pigments known as flavonoids, which are responsible for the vibrant colors found in many fruits, vegetables, and other plant-based foods.

Chemical Structure:
The basic structure of flavonoids includes 15 carbon atoms arranged in a pattern that forms two phenyl rings (A and B) connected by three carbon atoms that form an oxygenated heterocycle. Citrus bioflavonoids, in particular, are often glycosides, meaning they are bound to one or more sugar molecules, which can influence their bioavailability and absorption in the body.

Types of Citrus Bioflavonoids:
Within the category of citrus bioflavonoids, there are several types, each with distinct chemical structures and properties:

- Hesperidin: A flavanone glycoside commonly found in oranges and tangerines, hesperidin is one of the most abundant flavonoids in citrus fruits.
- Naringenin: A flavanone found in grapefruits, naringenin is known for its potential health benefits, particularly in relation to bone health and metabolism.
- Eriodictyol: This flavanone is found in various citrus fruits and has been studied for its potential antioxidant and anti-inflammatory effects.
- Citrus Flavanols: A group of flavanols that includes compounds like (-)-epicatechin and (+)-catechin, which are also found in green tea and cocoa.

Biosynthesis Pathway:
Citrus bioflavonoids are synthesized in plants through a series of enzymatic reactions involving phenylalanine as a precursor. The process involves the action of various enzymes such as chalcone synthase, flavanone 3-hydroxylase, and dihydroflavonol 4-reductase, which modify the basic flavonoid structure to produce the diverse array of bioflavonoids found in citrus fruits.

The stereochemistry of citrus bioflavonoids, particularly the flavanols, is important for their biological activity. For example, the (-)-epicatechin found in green tea and cocoa has a specific stereochemistry that contributes to its antioxidant properties.

In summary, the chemical composition and structure of citrus bioflavonoids are complex and varied, with each type offering unique health benefits. Understanding these structures is crucial for the development of dietary supplements and pharmaceuticals that leverage the health-promoting properties of these natural compounds.

2. Sources of Citrus Bioflavonoids

2. Sources of Citrus Bioflavonoids

Citrus bioflavonoids are a diverse group of plant compounds that are primarily found in citrus fruits. These compounds are responsible for the vibrant colors and antioxidant properties of these fruits. They are also present in smaller amounts in other plant sources. Here, we will explore the various sources of citrus bioflavonoids and their distribution.

Citrus Fruits:
The most abundant and well-known sources of citrus bioflavonoids are citrus fruits themselves. This group includes oranges, lemons, limes, grapefruits, and tangerines, among others. Each of these fruits contains a unique profile of bioflavonoids, which contribute to their distinct flavors, colors, and health benefits.

Oranges are rich in hesperidin and naringenin, two common bioflavonoids that have been extensively studied for their health-promoting properties. These compounds are particularly concentrated in the peel and pith (the white layer beneath the peel) of the fruit.

Lemons and Limes:
Lemons and limes are also good sources of bioflavonoids, with eriocitrin and hesperidin being the primary types found in these fruits. The zest, or the outermost layer of the peel, is particularly rich in these compounds.

Grapefruits contain a variety of bioflavonoids, including naringenin and hesperetin. The pink and red varieties of grapefruit tend to have higher levels of these compounds compared to the white varieties.

Tangerines and Mandarins:
Tangerines and mandarins are another excellent source of citrus bioflavonoids, with hesperidin and naringin being the most prevalent. These fruits are unique in that they are easier to peel and have a higher concentration of bioflavonoids in the edible parts compared to other citrus fruits.

Other Plant Sources:
While citrus fruits are the primary sources of bioflavonoids, these compounds can also be found in other plant foods, albeit in smaller amounts. Some examples include:

- Apples: Particularly rich in quercetin, a bioflavonoid with potent antioxidant and anti-inflammatory properties.
- Onions and Garlic: Contain quercetin and other bioflavonoids that contribute to their health benefits.
- Tea: Especially green tea, which contains catechins, a type of bioflavonoid with numerous health benefits.
- Red Wine: Contains resveratrol, a bioflavonoid that is known for its antioxidant and anti-inflammatory effects.

Citrus bioflavonoids are also available in supplement form, often as a concentrated extract or in combination with other nutrients. These supplements can be a convenient way to increase your intake of these beneficial compounds, especially if you do not consume a lot of citrus fruits.

In conclusion, citrus bioflavonoids can be found in a variety of citrus fruits, with each fruit offering a unique profile of these compounds. Additionally, they can be found in smaller amounts in other plant foods and are available as dietary supplements. Including a variety of these sources in your diet can help ensure that you receive the full range of health benefits associated with citrus bioflavonoids.

3. Health Benefits and Nutritional Profile

3. Health Benefits and Nutritional Profile

Citrus bioflavonoids are a diverse group of plant compounds that are found in various citrus fruits such as oranges, lemons, grapefruits, and tangerines. They are known for their numerous health benefits and rich nutritional profile. Here, we delve into the specific advantages and nutritional components of citrus bioflavonoids.

Health Benefits:

1. Enhanced Immunity: Citrus bioflavonoids have been shown to support the immune system by modulating the activity of immune cells and reducing inflammation.

2. Improved Cardiovascular Health: These compounds can help lower blood pressure and improve blood vessel function, which is crucial for heart health.

3. Cancer Prevention: The antioxidant properties of citrus bioflavonoids may help prevent the formation of cancerous cells and slow the growth of existing tumors.

4. Antimicrobial Activity: Some bioflavonoids have demonstrated the ability to inhibit the growth of certain bacteria and viruses, contributing to overall health.

5. Anti-Allergic Effects: They can help reduce the severity of allergic reactions by stabilizing the release of histamine.

6. Enhanced Vision: Bioflavonoids are thought to support eye health and may help prevent age-related macular degeneration.

7. Bone Health: They may contribute to bone strength by supporting the absorption of calcium and other minerals.

Nutritional Profile:

Citrus bioflavonoids are not just beneficial for their health effects; they also contribute to a well-rounded diet with their nutritional content. Here's what they typically include:

1. Vitamin C: A powerful antioxidant that supports the immune system and aids in the absorption of iron.

2. Dietary Fiber: Helps with digestion and can contribute to a feeling of fullness, aiding in weight management.

3. Vitamins and Minerals: Including small amounts of various vitamins and minerals that are essential for overall health.

4. Low in Calories: Citrus fruits are typically low in calories, making them a healthy snack option.

5. Hydration: Being high in water content, they contribute to daily hydration needs.

Bioavailability and Absorption:

One of the key features of citrus bioflavonoids is their high bioavailability, meaning they are easily absorbed by the body. This is particularly important because it ensures that the health benefits can be fully realized.


The health benefits and nutritional profile of citrus bioflavonoids make them a valuable addition to a balanced diet. From supporting immune function to promoting cardiovascular health, these natural compounds offer a range of advantages that contribute to overall well-being. Incorporating a variety of citrus fruits into your daily diet can provide a rich source of these beneficial bioflavonoids.

4. Antioxidant and Anti-Inflammatory Properties

4. Antioxidant and Anti-Inflammatory Properties

Citrus bioflavonoids are renowned for their potent antioxidant and anti-inflammatory properties, which contribute significantly to their health-promoting effects. These natural compounds are capable of neutralizing free radicals and reducing oxidative stress, thereby protecting the body from various diseases and conditions.

Antioxidant Properties:
Antioxidants are essential for maintaining cellular health, as they combat the harmful effects of free radicals—unstable molecules that can damage cells and contribute to aging and disease. Citrus bioflavonoids, such as hesperidin, naringin, and quercetin, have been shown to possess strong antioxidant activity. They work by donating electrons to neutralize free radicals, thus preventing oxidative damage to lipids, proteins, and DNA.

Anti-Inflammatory Properties:
Inflammation is a natural response of the body to injury or infection, but chronic inflammation can lead to various health issues. Citrus bioflavonoids have demonstrated the ability to modulate inflammatory pathways, reducing the production of pro-inflammatory cytokines and enzymes. This anti-inflammatory action can be beneficial in managing conditions such as arthritis, asthma, and inflammatory bowel disease.

Mechanisms of Action:
The antioxidant and anti-inflammatory effects of citrus bioflavonoids are attributed to several mechanisms:

1. Scavenging Free Radicals: Directly neutralizing free radicals, preventing oxidative chain reactions.
2. Modulating Enzyme Activity: Inhibiting enzymes that generate free radicals, such as xanthine oxidase and lipoxygenase.
3. Regulating Gene Expression: Affecting the expression of genes involved in inflammation and oxidative stress.
4. Activating Antioxidant Defenses: Enhancing the activity of endogenous antioxidants like superoxide dismutase, catalase, and glutathione peroxidase.

Health Implications:
The combined antioxidant and anti-inflammatory properties of citrus bioflavonoids support a wide range of health benefits:

- Cardiovascular Health: By reducing oxidative stress and inflammation, citrus bioflavonoids can help lower the risk of heart disease and stroke.
- Cancer Prevention: Their antioxidant activity may help prevent the formation of cancerous cells, while their anti-inflammatory effects can inhibit tumor growth and metastasis.
- Immune System Support: Citrus bioflavonoids can modulate the immune response, potentially enhancing resistance to infections and reducing autoimmune disease symptoms.
- Skin Health: Topical application of citrus bioflavonoids can protect the skin from environmental damage, reduce inflammation, and promote collagen production, contributing to anti-aging effects.

Research and Clinical Evidence:
Numerous in vitro, animal, and human studies have provided evidence supporting the antioxidant and anti-inflammatory properties of citrus bioflavonoids. While more research is needed to fully understand their mechanisms and optimal dosages, the existing body of research indicates a promising role for these compounds in promoting health and preventing disease.

In conclusion, the antioxidant and anti-inflammatory properties of citrus bioflavonoids are central to their health benefits. As research continues to uncover the full spectrum of their effects, it is likely that these natural compounds will play an increasingly important role in both medicine and skincare.

5. Applications in Medicine and Skin Care

5. Applications in Medicine and Skin Care

Citrus bioflavonoids have found a myriad of applications in both the medical and skincare industries, thanks to their diverse health benefits and natural properties. Here's a closer look at how these compounds are utilized in various fields:

Medical Applications
1. Enhancing Medication Efficacy: Citrus bioflavonoids are known to increase the bioavailability of certain drugs, allowing for lower doses to be used while still achieving therapeutic effects. This can be particularly beneficial in reducing the side effects of medications.

2. Supporting Cardiovascular Health: Due to their antioxidant properties, bioflavonoids can help protect the cardiovascular system by reducing oxidative stress and inflammation, which are key contributors to heart disease.

3. Antiviral Activity: Some studies suggest that citrus bioflavonoids may have antiviral properties, potentially supporting the immune system against viral infections.

4. Antimicrobial Properties: Bioflavonoids can also exhibit antimicrobial effects, making them useful in the treatment of bacterial infections.

5. Cancer Prevention and Therapy: The antioxidant and anti-inflammatory properties of bioflavonoids may play a role in cancer prevention by neutralizing free radicals and reducing inflammation, which can lead to the development of cancer.

Skin Care Applications
1. Anti-Aging: The antioxidant properties of citrus bioflavonoids help in combating the signs of aging by neutralizing free radicals that cause skin damage and wrinkles.

2. Skin Brightening: Bioflavonoids can inhibit the activity of enzymes that lead to pigmentation, making them useful in skin brightening and evening out skin tone.

3. Protection from UV Damage: The presence of bioflavonoids in topical formulations can offer some protection against the harmful effects of UV radiation, reducing the risk of skin cancer and premature aging.

4. Anti-Inflammatory Effects: For individuals with skin conditions such as eczema or dermatitis, the anti-inflammatory properties of bioflavonoids can help soothe and calm irritated skin.

5. Moisturizing Agents: Bioflavonoids can help retain moisture in the skin, making them an excellent ingredient in hydrating skincare products.

6. Natural Preservatives: Due to their antimicrobial properties, bioflavonoids can act as natural preservatives in skincare products, extending their shelf life without the need for synthetic additives.

The versatility of citrus bioflavonoids in medicine and skincare underscores their importance in health and wellness. As research continues to uncover more about their mechanisms of action and potential benefits, it is likely that their applications will continue to expand.

6. Interactions with Other Nutrients and Compounds

6. Interactions with Other Nutrients and Compounds

Citrus bioflavonoids, while beneficial on their own, can interact with various other nutrients and compounds within the body. These interactions can either be synergistic, enhancing the effects of each component, or antagonistic, potentially reducing the efficacy of one or both substances. Understanding these interactions is crucial for optimizing the health benefits of citrus bioflavonoids.

6.1 Synergy with Vitamin C

One of the most well-known interactions of citrus bioflavonoids is with vitamin C. Bioflavonoids are often found in conjunction with vitamin C in citrus fruits, and research suggests that they work synergistically to enhance the absorption and effectiveness of vitamin C. This relationship is particularly important for immune function and skin health.

6.2 Interaction with Other Antioxidants

Citrus bioflavonoids can also interact with other antioxidants present in the diet, such as vitamin E and selenium. These interactions can lead to a more robust antioxidant defense system in the body, helping to neutralize free radicals and protect against oxidative stress.

6.3 Potential Antagonism with Certain Medications

While generally safe, citrus bioflavonoids may interact with certain medications, particularly those metabolized by the liver's cytochrome P450 enzymes. This can lead to increased or decreased drug efficacy, or even adverse effects. Individuals taking medications should consult with a healthcare provider before supplementing with citrus bioflavonoids.

6.4 Interaction with Hormonal Therapies

Some research suggests that certain bioflavonoids, particularly those with phytoestrogen properties, may interact with hormonal therapies such as birth control pills or hormone replacement therapy. This interaction could potentially affect the efficacy of these therapies or cause hormonal imbalances.

6.5 Interaction with Diet and Lifestyle Factors

The effectiveness of citrus bioflavonoids can also be influenced by diet and lifestyle factors. A diet rich in antioxidants and anti-inflammatory compounds, along with regular physical activity, can enhance the benefits of bioflavonoids. Conversely, a diet high in processed foods and a sedentary lifestyle may reduce their effectiveness.

6.6 Conclusion

Understanding the interactions of citrus bioflavonoids with other nutrients and compounds is essential for maximizing their health benefits. While many of these interactions are synergistic, it's important to be aware of potential antagonistic effects, particularly with medications and hormonal therapies. As with any supplement or nutrient, it's always best to consult with a healthcare provider to ensure safe and effective use.

7. Research Studies and Clinical Trials

7. Research Studies and Clinical Trials

Citrus bioflavonoids have been the subject of numerous research studies and clinical trials, which have sought to explore their potential health benefits and therapeutic applications. Here are some key findings from these studies:

1. Cardiovascular Health: A study published in the Journal of Nutrition found that a diet rich in citrus bioflavonoids can help improve cardiovascular health by reducing the risk of heart disease. The study suggested that the antioxidant properties of these compounds may play a significant role in this effect.

2. Anti-Inflammatory Effects: Research has shown that citrus bioflavonoids possess anti-inflammatory properties. A clinical trial conducted on patients with inflammatory conditions found a significant reduction in inflammation markers after the consumption of bioflavonoid-rich citrus extracts.

3. Skin Care: A study published in the International Journal of Dermatology investigated the effects of a topical application of citrus bioflavonoids on skin health. The results indicated that these compounds can improve skin elasticity and reduce the appearance of wrinkles, suggesting their potential use in anti-aging skin care products.

4. Interaction with Medications: Clinical trials have also explored the interactions of citrus bioflavonoids with certain medications. One study found that bioflavonoids can enhance the effectiveness of certain drugs by improving their absorption and bioavailability.

5. Cancer Prevention: While more research is needed, preliminary studies suggest that citrus bioflavonoids may have potential in cancer prevention. A study in the journal Cancer Research indicated that these compounds can inhibit the growth of certain types of cancer cells.

6. Immune System Support: Research has also looked into the role of citrus bioflavonoids in supporting the immune system. A clinical trial found that supplementation with bioflavonoids can enhance immune function, particularly in individuals with compromised immune systems.

7. Oral Health: Studies have shown that citrus bioflavonoids can have a positive impact on oral health. A clinical trial conducted on patients with periodontal disease found that the use of bioflavonoid supplements led to significant improvements in gum health.

8. Vision Health: There is emerging evidence that suggests citrus bioflavonoids may play a role in maintaining vision health. A study published in the journal Ophthalmology found that individuals with higher intakes of bioflavonoids had a reduced risk of age-related macular degeneration.

These studies and clinical trials highlight the potential benefits of citrus bioflavonoids, but it's important to note that more research is needed to fully understand their mechanisms of action and to establish optimal dosages for various health applications. As with any supplement or nutrient, it's crucial to consult with a healthcare provider before incorporating citrus bioflavonoids into a health regimen.

8. Safety and Dosage Recommendations

8. Safety and Dosage Recommendations

Citrus bioflavonoids are generally considered safe for consumption, and they are often found in various foods and supplements. However, as with any supplement or nutrient, it's important to be aware of the recommended dosages and potential safety concerns.


The optimal dosage of citrus bioflavonoids can vary depending on the specific type of bioflavonoid, the individual's health status, and the intended use. Here are some general guidelines:

- Dietary Intake: The best way to obtain bioflavonoids is through a balanced diet rich in fruits and vegetables, particularly citrus fruits. The recommended daily intake of bioflavonoids from food sources is not well-defined, but consuming a variety of fruits and vegetables can provide a wide range of bioflavonoids.

- Supplemental Intake: For those who choose to take bioflavonoid supplements, the dosage can range from 100 mg to 1,000 mg per day, depending on the product and the specific bioflavonoid. It's important to follow the manufacturer's instructions and not exceed the recommended dosage.

- Individual Factors: Dosage may need to be adjusted based on age, weight, overall health, and any medical conditions. Pregnant or breastfeeding women, children, and individuals with specific health concerns should consult with a healthcare provider before starting supplementation.


While citrus bioflavonoids are generally safe, there are a few considerations:

- Allergic Reactions: Some individuals may be allergic to citrus or other components in bioflavonoid supplements. Symptoms of an allergic reaction can include itching, hives, difficulty breathing, and swelling of the face, lips, tongue, or throat.

- Interactions with Medications: Bioflavonoids may interact with certain medications, including blood thinners, chemotherapy drugs, and some heart medications. If you are taking any medications, consult with a healthcare provider before starting bioflavonoid supplementation.

- Potential Side Effects: High doses of bioflavonoids can cause side effects such as gastrointestinal issues, dizziness, and headache. It's important to stay within the recommended dosage range.

- Quality of Supplements: Not all supplements are created equal. Look for products from reputable manufacturers that have been third-party tested for purity and potency.


- Consult a Healthcare Provider: Before starting any supplementation regimen, especially if you have pre-existing health conditions or are taking medications, consult with a healthcare provider.

- Diversify Your Diet: Obtaining bioflavonoids through a varied diet is the best approach. Incorporate a wide range of fruits and vegetables to ensure you're getting a diverse array of bioflavonoids and other nutrients.

- Monitor Your Intake: Keep track of your bioflavonoid intake from both food and supplements to ensure you're not exceeding the recommended dosage.

- Quality Matters: Choose high-quality supplements from reputable brands to ensure you're getting a safe and effective product.

In conclusion, while citrus bioflavonoids offer numerous health benefits, it's important to approach supplementation with caution. Always consult with a healthcare provider, choose high-quality products, and stay within the recommended dosage range to ensure safety and effectiveness.

9. Conclusion and Future Perspectives

9. Conclusion and Future Perspectives

Citrus bioflavonoids, a diverse group of plant-derived compounds, have garnered significant attention for their potential health benefits and therapeutic applications. As our understanding of their chemical composition and structure deepens, so too does our appreciation for the multifaceted roles they play in promoting health and well-being.

From their abundant presence in various citrus fruits to their incorporation into medicine and skincare, the versatility of citrus bioflavonoids is undeniable. Their health benefits, which include antioxidant and anti-inflammatory properties, have been supported by a growing body of research. These compounds have demonstrated the ability to protect against oxidative stress, reduce inflammation, and support cardiovascular health, among other benefits.

The applications of citrus bioflavonoids in medicine and skincare are particularly promising. Their use in treating conditions such as atherosclerosis, improving skin health, and even in cancer prevention and therapy highlights their potential as natural, effective alternatives to synthetic drugs.

Furthermore, the interactions of citrus bioflavonoids with other nutrients and compounds underscore the complexity of their biological activity. These interactions can enhance the bioavailability and efficacy of other nutrients, contributing to the overall health-promoting effects of these compounds.

Clinical trials and research studies continue to explore the full extent of the benefits and mechanisms of action of citrus bioflavonoids. As more evidence accumulates, it is likely that their use will become more widespread, both as dietary supplements and as components of pharmaceutical and skincare products.

Safety and dosage recommendations are essential considerations for the responsible use of citrus bioflavonoids. While they are generally considered safe, it is crucial to adhere to recommended dosages and consult with healthcare professionals, especially when considering their use for therapeutic purposes.

Looking to the future, there is much to be excited about when it comes to citrus bioflavonoids. As research continues to uncover the full spectrum of their health benefits and applications, we can expect to see an increase in their integration into various aspects of healthcare and wellness. From targeted therapies for specific conditions to holistic approaches to overall health, citrus bioflavonoids are poised to play a significant role in the future of medicine and wellness.

In conclusion, the potential of citrus bioflavonoids is vast, and their impact on health and wellness is only beginning to be fully realized. As our understanding of these compounds grows, so too will the opportunities for their use in improving the quality of life for individuals around the world. The future of citrus bioflavonoids is bright, and their continued study and application hold great promise for the advancement of health and well-being.

Contact Us
To learn more about our, get in touch with us right away!
We have 5 factories and 19 years of experience in plant extracts. welcome your inquiries and will respond to any questions you have within 24 hours. Thank you.
Get a Quote