Immune Support Scientific References

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LATEST RESEARCH UPDATE: A recent randomized placebo-controlled trial found that palmitoylethanolamide (PEA) and luteolin supplementation improved olfactory function in those with persistent post-COVID-19 olfactory impairment. This trial compared olfactory training plus PEA-Lut (700 mg of PEA + 70 mg of Luteolin) to olfactory training plus placebo in 185 patients for 90 days. The PEA-Lut group showed significantly greater improvement in olfactory function scores (92% of patients improved versus 42% of control patients). Click here to read more.


Immune Support

Cannabidiol (CBD)
Green Tea
Palmitoylethanolamide (PEA)
Vitamin C
Vitamin D

(2024/02) Preventive Vitamin D Supplementation and Risk for COVID-19 Infection: A Systematic Review and Meta-Analysis.

(2023/08) Lack of vitamin D predicts impaired long-term immune response to COVID-19 vaccination.

(2022/06) Vitamin D and SARS-CoV2 infection, severity and mortality: A systematic review and meta-analysis.

(2022/02) COVID-19 mortality is associated with low vitamin D levels in patients with risk factors and/or advanced age.

(2022/02) Does vitamin D supplementation reduce COVID-19 severity? - a systematic review.

(2022/02) Pre-infection 25-hydroxyvitamin D3 levels and association with severity of COVID-19 illness.

(2021/06) Vitamin D supplementation and clinical outcomes in COVID‑19: a systematic review and meta‑analysis.

(2021/03) Low Serum 25-hydroxyvitamin D (Vitamin D) Level Is Associated With Susceptibility to COVID-19, Severity, and Mortality: A Systematic Review and Meta-Analysis.

(2021/03) The Impact of Vitamin D Level on COVID-19 Infection: Systematic Review and Meta-Analysis.

(2020/07) Low plasma 25(OH) vitamin D level is associated with increased risk of COVID-19 infection: an Israeli population-based study.

(2020/05) Tripartite combination of potential pandemic mitigation agents: Vitamin D, Quercetin, and Estradiol manifest properties of candidate medicinal agents for mitigation of the severity of pandemic COVID-19 defined by genomics-guided tracing of SARS-CoV-2 targets in human cells.

(2020/04) Evidence that Vitamin D Supplementation Could Reduce Risk of Influenza and COVID-19 Infections and Deaths.

(2019/01) Vitamin D supplementation to prevent acute respiratory infections: individual participant data meta-analysis.

(2017/02) Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data.

(2016/03) A review of Vitamin D effects on common respiratory diseases: Asthma, chronic obstructive pulmonary disease, and tuberculosis.

(2015/12) Vitamin D Supplementation Modulates T Cell-Mediated Immunity in Humans: Results from a Randomized Control Trial.






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