References

Turmeric
Curcumin is an active agent in turmeric. Studies show that turmeric has a direct impact on the immune system as it’s antiviral, antioxidant, antiinflammatory and also a potent immunomodulatory agent that helps with activation of T cells (important for immune response). 
Studies
"Spicing up" of the immune system by curcumin. - https://www.ncbi.nlm.nih.gov/pubmed/17211725
Curcumin and tumor immune-editing: resurrecting the immune system - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603973/
Therapeutic effects of curcumin in inflammatory and immune-mediated diseases: A nature-made jack-of-all-trades? - https://www.ncbi.nlm.nih.gov/pubmed/28059453

 

Calendula
Calendula is one of the oldest known medical herbs. Historically, it was popular in Europe as an immune booster. Studies show that Calendula exhibits antibacterial, antiviral, anti-inflammatory, anti-tumor, antimicrobial and antioxidant properties. All important for boosting the immune system.
Studies:
A review on phytochemistry and ethnopharmacological aspects of genus Calendula - www.ncbi.nlm.nih.gov/pmc/articles/PMC3841996/
Effects of drugs of plant origin on the development of the immune response - www.ncbi.nlm.nih.gov/pubmed/22238748
Effects of lutein from marigold extract on immunity and growth of mammary tumors in mice. - www.ncbi.nlm.nih.gov/pubmed/9042242

 

Cat's Claw
Cat's claw contains active ingredients that stimulate the body’s production of immune cells. Studies show that people who consumed cat's claw increased their number of white blood cells and thus boosting their immune system. Cat's claw is also antiinflammatory
Studies:
LiverTox: Clinical and Research Information on Drug-Induced Liver Injury - ncbi.nlm.nih.gov/books/NBK548323/
Enhanced DNA repair, immune function and reduced toxicity of C-MED-100, a novel aqueous extract from Uncaria tomentosa. - ncbi.nlm.nih.gov/pubmed/10687868
Persistent response to pneumococcal vaccine in individuals supplemented with a novel water soluble extract of Uncaria tomentosa, C-Med-100. ncbi.nlm.nih.gov/pubmed/11515716

 

Burdock Root
Burdock root is a powerful herb, it helps regulate immune cell migration and activation and some animal studies show that burdock root helped tackle freely circulating viruses, or viruses outside the infected cells in mice. Thus showing it potential immune boosting effects.
Studies:
Effects of drugs of plant origin on the development of the immune response. - www.ncbi.nlm.nih.gov/pubmed/22238748
Burdock root extracts limit quorum-sensing-controlled phenotypes and biofilm architecture in major urinary tract pathogens. - www.ncbi.nlm.nih.gov/pubmed/25226848
Arctium lappa extract Suppresses Inflammation and Inhibits Melanoma Progression - www.ncbi.nlm.nih.gov/pmc/articles/PMC6789568/

 

Echinacea
Research shows that Echinacea increases the number of white blood cells. White blood cells fight infections and are a key component of the immune system. Echinacea is anti viral, anti-inflammatory, antioxidant and antimicrobial, all very important for optimal immune function. 
Studies:
Echinacea intake induces an immune response through altered expression of leucocyte hsp70, increased white cell counts and improved erythrocyte antioxidant defences. - ncbi.nlm.nih.gov/pubmed/15985050
Enhancement of innate and adaptive immune functions by multiple Echinacea species. - ncbi.nlm.nih.gov/pubmed/17887935
Immune enhancing effects of Echinacea purpurea root extract by reducing regulatory T cell number and function. - ncbi.nlm.nih.gov/pubmed/24868871

 

Gingko Biloba

Studies:

Sukhwinder Kaur et al. (2016). Anti-inflammatory effects of Ginkgo biloba extract against trimethyltin-induced hippocampal neuronal injury. Available: https://pubmed.ncbi.nlm.nih.gov/28918573/

Penn State Hershey medical center. (2015). Ginkgo biloba - . Laboratory studies have shown that ginkgo improves blood circulation by opening up blood vessels and making blood less sticky. Available: http://pennstatehershey.adam.com/content.aspx?productid=107&pid=33&gid=000247#Supporting%20Research.

Chun-Xiao Dai Et Al. (2018). Role of Ginkgo biloba extract as an adjunctive treatment of elderly patients with depression and on the expression of serum S100B. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6181482/

 

Siberian Ginseng

Studies:

Lin-Zhang Huang Et Al. (2011). Bioactivity-guided fractionation for anti-fatigue property of Acanthopanax senticosus. Available: https://pubmed.ncbi.nlm.nih.gov/20920564/

Yui Yamauchi et al. (2019). Memory Enhancement by Oral Administration of Extract of Eleutherococcus senticosus Leaves and Active Compounds Transferred in the Brain. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567285/

Debin Huang et al. (2013). Eleutheroside B or E enhances learning and memory in experimentally aged rats. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4145894/

 

Milk Thistle

Studies:

Suzanne R. Steinbaum, MD. (2019). Milk Thistle: Benefits and Side Effects. Available: https://www.webmd.com/digestive-disorders/milk-thistle-benefits-and-side-effects#1.  

C Mulrow et al. (2000). Milk Thistle: Effects on Liver Disease and Cirrhosis and Clinical Adverse Effects: Summary. Available: https://www.ncbi.nlm.nih.gov/books/NBK11896/.  

Abby B Siegel et al. (2013). Milk thistle: early seeds of potential. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116427/.  

Lancet Oncol.. (2014). Milk thistle: early seeds of potential. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116427/.

 

Sarsaparilla

Studies:

Tiantian She et al. (2015). Sarsaparilla (Smilax Glabra Rhizome) Extract Inhibits Migration and Invasion of Cancer Cells by Suppressing TGF-β1 Pathway. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4351248/.  

Jacquelyn Cafasso . (2019). Sarsaparilla: Benefits, Risks, and Side Effects. Available: https://www.healthline.com/health/food-nutrition/sarsaparilla. Last accessed 1st Oct 2020

 

Maca Root

Studies:

Nicole A Brooks et al. (2008). Beneficial effects of Lepidium meyenii (Maca) on psychological symptoms and measures of sexual dysfunction in postmenopausal women are not related to estrogen or androgen content. Available: https://pubmed.ncbi.nlm.nih.gov/18784609/

Julio Rubio et al. (2011). Aqueous Extract of Black Maca (Lepidium meyenii) on Memory Impairment Induced by Ovariectomy in Mice. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3096456/. 

 

Ashwaghanda

Studies:

Jaysing Salve et al. (2019). Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults: A Double-blind, Randomized, Placebo-controlled Clinical Study. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6979308/ 


Shweta Shenoy et al. (2012). Effects of eight-week supplementation of Ashwagandha on cardiorespiratory endurance in elite Indian cyclists. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3545242/. 

 

Cacao

Studies:

Valentina Socci et al. (2017). Enhancing Human Cognition with Cocoa Flavonoids. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5432604/.  


Astrid Nehlig. (2013). The neuroprotective effects of cocoa flavanol and its influence on cognitive performance. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3575938/.