Olive Leaf Extract – A Simple Way To Boost Our Immune System

Olive leaf extract has been popular as an herbal remedy in many cultures and utilized by herbalists for healing, immune boosting and sickness since ancient times.  This has carried forward to modern times and present-day nutritionists and herbalists frequently recommend olive leaf extract as a phenomenal nutrient for supporting and boosting the immune system as well as overall health support for the body.

The active nutrient in olive leaf is a highly active phenolic glucoside compound called oleuropein which is a naturally occurring phytonutrient and the pharmacologically active constituent responsible for most of olive leaf’s immune effects and powerful antioxidant benefits.

Click Here to read about the benefits of Olive Leaf Extract on Human Health

And as mentioned earlier, even though olive leaf has been used as a medicinal nutrient for centuries, research on the herb’s immune boosting effects only kicked in with  more interest and intent in the 1990’s.  One such study done was a double-blind, placebo-controlled human clinical study that confirmed olive leaf’s ability to enhance the immune response.

It was an eight-week study that followed 29 healthy men and found that olive leaf extract can change the response of  peripheral mononuclear cells in their blood, which are white blood cells associated with the immune system and included T cells, B cells, natural killer cells, and monocytes.  Essentially, the results indicated that olive leaf “down regulated” the negative immune responses of the body while it “up regulating” the positive immune responses in the body!

Click Here to read about a human Intervention Study to Assess the Effects of Supplementation with Olive Leaf Extract on Peripheral Blood Mononuclear Cell Gene Expression

Anti-Viral and Anti-Microbial Benefits of Olive Leaf Extract 

Olive Leaf  has also been found to be powerful broad-spectrum antiviral agent when tested against below viruses:  

  • Herpes simplex type 1and 2

  • Herpes zoster

  • Multiple viral strains of influenza and para-influenza

  • Rhinovirus

  • Myxoviruses

  • Encephalomyocarditis

  • Polio 1, 2 and 3

  • Two strains of leukemia virus

In fact, there have been research papers that have proposed olive leaf extract could be used as a safe and natural antiviral therapy. Common antiviral uses in natural health circles based on research would include support in fighting colds and flu, yeast infections and viral infections such as Epstein-Barr, shingles and herpes. 

Most study’s done on Olive Leaf extract have been in-vitro studies; however, they have been very promising by showing olive leaf extract to be an effective antimicrobial nutrient for a variety of pathogens that cause gastrointestinal and/or respiratory infections by interfering with the replication process of the ‘bad bugs”, slowing the infection process to the point where our body’s immune system can do its job and prevent further overgrowth of the infection! These pathogens stifled by Olive Leaf Extract included: 

  • Salmonella typhi

  • Vibrio parahaemolyticus

  • Stapholycoccus aureus

  • Klebsiella pneumonia

  • Escherichia coli 

Click here to read about the comparative antibacterial and antifungal effects of some phenolic compounds Here.


Click here to read about the effect of the olive phenolic compound, oleuropein, on growth and enterotoxin B production by Staphylococcus aureus.

The point here is, Olive Leaf Extract appears to be just another phenomenal nutrient provided by mother nature that will not only boost our immune system but will also aid in our overall health and wellbeing as an anti-oxidant, anti-inflammatory, anti-fungal, anti-diabetic and anti-cancer agent! 

Do your own due diligence on Olive Leaf of course but I think you will find that this is just another awesome nutrient to make a part of your healthy living strategies! And as always, if you need a superior form of Olive Leaf Extract just let us know….we can certainly make a great recommendation!

Make it a Healthy Day!!

Dr. Cadwell

P.S.  Can’t make it to the office – Good News! We can Drop Ship directly to your home if you’d like to order any of our Immune and/or Health promoting products. Just call the office at 720-795-7920, tell us what you want or order online here and we’ll get it sent out ASAP!!


Author BradG

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