Green Tea, Curcumin or Black Seed? Which is best?

Description

Today, we get to explore how food and herbal medicine directly affect the inflammatory process, and we will focus on these three things: 

1. What are cytokines, and what is their role in the inflammatory process?
2. The effects that green tea, curcumin, and black seed oil have on cytokine levels
3. Which one is best for supporting a healthy cytokine response? 

So, let’s begin. 

In simple terms, cytokines are small proteins that act as chemical messengers within your immune system, helping control inflammation. However, if you have read any of my previous articles, you know I never leave it at “simple”. 

Cytokines’ primary purpose is to ensure your immune cells know exactly when to attack pathogens, how to coordinate an attack, and when to stand down through regulating immune and inflammatory responses. 

Cytokines are responsible for the following functions:

• Coordinating immune responses by binding to specific cell-surface receptors. This triggers intracellular signaling cascades that direct immune cells to sites of infection. 
• Signaling Inflammation: This refers to chemicals produced by the body known as pro-inflammatory cytokines. Their purpose is to trigger localized inflammation, recruit immune cells to the site of damage, promote fever to inhibit pathogen growth, and facilitate tissue repair. 
• Resolving Inflammation: After injury or infection are under control, cytokines turn off the immune response to prevent damage to healthy tissue.  

Depending on their specific role and target, cytokines are classified into the following groups: 

• Interleukins: signaling proteins produced by white blood cells that facilitate cell-to-cell communication within the immune system, coordinating the body's defense against infections, diseases, and inflammation.
• Chemokines: Act as the body’s traffic controllers for leukocytes (White blood cells), guiding cells to exactly where they are needed. 
• Interferons: Signaling proteins that your immune system releases in response to infections or threats that interfere with viral replication, preventing viruses from multiplying and spreading to healthy cells. They do this by bridging innate immunity (the body's immediate, non-specific response) with adaptive immunity (long-term, targeted defense).
• Tumor Necrosis Factors (TNFs): Signaling proteins that (depending on the receptor it binds to) can either promote cell survival and growth or trigger programmed cell death. 

Now that you got a quick lesson about what cytokines are and their specific functions, let’s discuss their role in the inflammation process.

As stated above, cytokines act as the body’s chemical messengers, coordinating the entire inflammatory process. Essentially, they are released by immune cells to trigger, direct, and turn off inflammation in response to an injury or infection. This process is done in four phases: 

1. Pro-inflammatory response: Essentially, cytokines sound the alarm and act quickly to contain the threat by stimulating the acute immune response. This increases blood flow, causes vascular leakage that leads to swelling and pain, and induces a fever. 
2. The recruitment phase: Cytokines increase blood vessel dilation and permeability, leading to fluid exiting the bloodstream and entering the affected tissue, resulting in classic signs of inflammation. 
3. The guidance phase: A subset of cytokines guide immune cells directly to the site of the injury or infection. 
4. The anti-inflammatory phase: anti-inflammatory cytokines IL-10 and TGF-beta are released to stop the immune response and promote tissue repair once the threat is no longer present.  

Finally, we can’t discuss cytokines without considering the effects of a cytokine storm. 

A cytokine storm, or hypercytokinemia, is a severe immune reaction in which the body releases excessive cytokines into the bloodstream too quickly. Having a large amount of them released into the body can be harmful. When I say “a large amount”, it is relative to the situation, and you should keep that in perspective. 

A cytokine storm can occur due to an infection, autoimmune condition, or other disease. 

We need a small increase in antiviral cytokines to fight off respiratory illness. While the above statement may sound scary, it is vital to understand that, with cytokine storms, the question is one of scale. 

For example, a mild-to-moderate infection can cause a 10- to 100-fold increase in cytokines, whereas running a marathon can produce a 100-fold increase. In severe cases, it can increase 10,000-fold. As a reference, the herb elderberry has recently been mistakenly blamed for causing a cytokine storm, when in fact it only increases cytokines 2 to 6-fold. 

There are generally three factors that influence the level of cytokine response: 

• The type of pathogen: While the cytokine profile differs between bacterial and viral infections, viruses generally trigger a higher level of cytokine release (up to 1000-fold).
•  Severity of the disease
• Age varies by greater than 1,000-fold across a population. 

Next, let’s discuss individually how green tea, curcumin, and black seed oil affect the cytokine response. 

Curcumin

To understand how curcumin affects the cytokine response, it is essential to first look at its effects on inflammation in general. Curcumin is touted as one of the most remarkable compounds for supporting a healthy inflammation response due to its unique mechanisms of action (Modulating Nuclear factor-kappa B). Nuclear factor-kappa B is a protein complex that activates genes that drive inflammation. 

Its three main jobs are DNA transcription, cytokine production, and cell survival. 

By modulating its action, this, in turn, prevents the rest of the cascade-like cyclooxygenases (COX 1 and 2), Lipoxygenase (lkb4) enzymes, and inducible nitric oxide synthase from responding in an unhealthy way. 

However, research has also shown that curcumin-free turmeric extracts are equally capable of supporting a healthy inflammatory response. The following statement was made in a review discussing the identification and effectiveness of specific compounds found in turmeric: “Recent research has identified numerous chemical entities from turmeric other than curcumin. It is unclear whether all of the activities ascribed to turmeric are due to curcumin or whether other compounds in turmeric can manifest these activities uniquely, additively, or synergistically with curcumin. However, studies have indicated that turmeric oil, present in turmeric, can enhance the bioavailability of curcumin.” Furthermore, specific essential oils in turmeric are necessary for proper curcumin utilization. 

Regarding curcumin's effects on the cytokine response, in simple terms, it broadly shifts the immune system from a pro-inflammatory state to an anti-inflammatory state. It does this by blocking transcription factors and intracellular signaling pathways, thereby resulting in suppressing pro-inflammatory cytokines and upregulating anti-inflammatory cytokines.  

Here is the breakdown of how this happens: 

• Curcumin stops the body from creating inflammation-causing proteins. It does this by acting as a roadblock to your cells' control systems, specifically by preventing the activation of NF-κB.
• Curcumin inhibits the interaction between the cell's inside and outside (JAK-STAT signaling pathway), thereby suppressing cytokine-driven inflammation.
• Curcumin downregulates inflammasome activation, reducing the secretion of inflammatory cytokines.  

Therefore, curcumin induces a measurable shift in circulating cytokine profiles by decreasing pro-inflammatory factors (TNF-α & IL-6), increasing anti-inflammatory factors (IL-10), and balancing Th1 and Th2 responses (which are directly associated with autoimmune conditions). 

Black Seed Oil

I can’t speak to the potent benefits of black seed oil without looking at one of its primary bioactive phytochemicals, thymoquinone; the primary active ingredient in the volatile oil of black cumin seeds (Nigella sativa). 

However, to understand how it affects the cytokine response, it is essential to first look at its effects on inflammation in general. 

Black seed oil directly modulates your immune system by interrupting the biological pathways that trigger chronic swelling and tissue damage as follows: 

• Actively blocking two of the major triggers for chronic inflammation: NF-κB and MAPK signaling pathways
• Inhibits pro-inflammatory enzymes like COX and LOX.
• Scavenging free radicals and neutralizing oxidative stress. 

Much like curcumin, black seed oil primarily affects the cytokine response by decreasing the production of pro-inflammatory cytokines (specifically TNF-α, IL-1β, and IL-6) while increasing the production of anti-inflammatory cytokines (such as IL-10).  

However, other compounds found in black seed oil also contribute to these potent effects on cytokine levels. 

1) Thymohydroquinone is considered a potent immunomodulatory agent that alters the cytokine response primarily by the following mechanisms. 

• Downregulating the expression and release of key pro-inflammatory mediators, including IL-1β, IL-6, and TNF-α. 
• Inhibition of Allergic (Th2) Cytokines
• Modulation of transcription factors directly responsible for the transcription of inflammatory genes.
• Autophagy and Cytoprotection by inhibiting eicosanoid storms and serving as an NLRP3 inflammasome inhibitor.

2) P-cymene is a compound that acts as a precursor to thymoquinone by modulating cytokine production through NF-κB and MAPK pathway inhibition.

3) Palmitic Acid is a saturated fatty acid that plays a direct role in the secretion of specific cytokines like IL-6 by acting as an agonist for the (TLR4) pathway.

The following was stated in a study investigating the effects of Nigella sativa oil extract on inflammatory cytokine response and oxidative stress status in patients with rheumatoid arthritis: 

• The serum IL-10 level was higher in the Nigella sativa group (p<0.01). 
• Treatment with Nigella sativa led to a significant reduction of serum MDA and NO compared with baseline (p<0.05).

Therefore, it was concluded that “Nigella sativa could improve inflammation and reduce oxidative stress in patients with RA. It is suggested that Nigella sativa may be a beneficial adjunct therapy in this population of patients.”

Matcha Green Tea

While found in other foods like apples and cacao, EGCG (Epigallocatechin Gallate) is the most abundant polyphenol (catechin) found in green and black tea. This potent polyphenol is known to downregulate inflammatory responses and improve marker levels. Rather than targeting a single cytokine, EGCG downregulates a broad spectrum of inflammatory markers by disrupting multiple immune cascades. 

There are many similarities in its effects on cytokine production to those of curcumin and black seed oil. Yes, it does work to inhibit NF-κB, suppress MAPK, curtail JAK-STAT, and activate Nrf2.  

However, green tea’s effects do have some unique attributes. 

Green tea uniquely alters T-cell differentiation by favorably shifting the balance between inflammatory and anti-inflammatory T-cells without causing immunosuppression. It does this by directly binding to the 67-kDa receptor (a protein on the surface of cells that acts as an anchor and communication hub) on immune cells, thereby initiating apoptosis in target tissues while protecting cellular barriers from cytokine-induced damage. Furthermore, green tea has also been shown to orchestrate immune responses, regulate cell death (apoptosis), and induce a fever.

In simple terms, green tea stops a cytokine storm by deactivating the protein complex NF-κB and calming hyperactive cell pathways like JAK2 and STAT3, which signal immune cells to multiply and attack. 

The following was stated in a review investigating the immunomodulating effects of epigallocatechin-3-gallate from green tea: 

• Consuming green tea or its active ingredient, epigallocatechin-3-gallate (EGCG), has consistently been shown to support the healthy functioning of several body systems. 
• Accumulating evidence has revealed an immunomodulating effect of green tea/EGCG. Several types of immune cells in both the innate and adaptive immune systems are known to be affected in varying degrees by green tea/EGCG. 
• The dramatic effects on T cell functions have been repeatedly demonstrated, including T cell activation, proliferation, differentiation, and cytokine production. 
• In particular, dysregulated T cell function across CD4(+) T cell subsets is a critical pathogenic factor in the development of autoimmune inflammatory diseases. 
• Recent studies have shown that EGCG affects the differentiation of naïve CD4(+) T cells into effector subsets in a way expected to impact autoimmunity favorably. 

Finally, which one of these three plant medicinals is the best choice for supporting a healthy cytokine response?

Truth be told, no individual choice is the best. 

While each of these medicinals has unique attributes, one of the primary rules of thumb in herbal medicine is that formulas work better than single herbs. 

Therefore, using these medicinals together in different combinations based on your specific needs is the best way to achieve your “anti-inflammatory” goals. 

It is very simple; they work better together than as individual entities. 

Ultimately, we see that these medicinals work well together to balance cytokine levels through pathway synergy, as each targets inflammation at different cellular checkpoints. Furthermore, the fatty acid profile in black seed oil also significantly improves the body's absorption of curcumin and green tea. 

In conclusion, I hope you have enjoyed examining the effects of these various foods and herbs on inflammation, and gained valuable insights into the importance of valuing these potent medicines for their full-spectrum effects. 

I believe that understanding and applying the concepts of synergy and that the whole is greater than the sum of its parts is the true path to optimal health. 

• For more information about Matcha Green Tea, go here: Organic Matcha Green Tea
• For more information about Curcumin, go here: Turmeric Root Extract (Curcumin) Powder
• For more information about Black Seed Oil, go here: Organic Black Seed Oil

The Author’s Bio
Michael Stuchiner is a Master Herbalist and proud graduate of The School of Natural Healing, with over 25 years of experience in various aspects of the field. He is a retired elite-level powerlifter who competed for 27 years. As an avid international traveler, he is passionate about medicinal and tonic herbs, as well as foods traditionally found in local markets across the 35 countries he has visited. Michael shares his years of experience as a Master Herbalist, traveler, and athlete through the hundreds of articles he has written and his YouTube channel, "A Master Herbalist Perspective." He is considered a true educator in this field. For more articles written by Mike, go here: Master Herbalist.