Lactoferrin is a key immune boosting molecule that is secreted primarily in breast milk, boosting the baby’s immune system at the same time as delivering iron. In adults it is secreted in many external fluids (such as saliva or lung mucous) as a first line of defense. Studies have found lactoferrin’s multifunctional role encompasses antibacterial, antiviral, antifungal, antioxidant and immune-balancing activities. Neonatal hospital units have also successfully used lactoferrin to help reduce infection in hospitals. Lactoferrin’s anti-mircrobial activity is partly due to its ability to bind to iron, which is essential for the growth of pathogenic bacteria and is also a major contributor to the generation of damaging reactive oxygen species. The evidence suggests that supplementation with lactoferrin increases the activity of immune cells known as leukocytes and stimulates the production of natural killer cells. Another unique action lactoferrin has is to turn on important immune related genes in the small intestine. Lactoferrin not only stimulates the immune system but also has a balancing effect, which explains why some studies have also found it to have an anti-inflammatory effect.
Andrographis: Out of the long list of immune boosting herbs find andrographis stands out for its effectiveness, tolerability and rapid action in combating infections and supporting the immune system. Andrographis is unique because it is a very “cooling” herb and has been traditionally used in ayurvedic medicine as an anti-fever, anti-bacterial and digestive tonic. Due to its cooling action (from the perspective of traditional Asian medicine), it is indicated for high fever, influenza and throat infections. Andrographis actually has an impressive amount of supporting literature supporting its use. At least 7 human trials have shown that it can decrease the symptoms of URTI’s in as little as 3 days. What is even more interesting is that andrographis has shown benefit in other infections such as hepatitis and enteric infections.
Carnosine: Believe it or not, there is new research that may support the benefit of chicken soup in fighting off viral infections and boosting our immune system. A recent study found that carnosine, a potent antioxidant found in chicken (and chicken soup), has a key role is disrupting viral replication and spread inside our cells. Carnosine is a key antioxidant with a primary role of neutralizing damaging free radicals inside our cells. By comparison, vitamin C is another potent antioxidant but its role is outside the cell. The influenza virus causes its damage and infection but taking over our own human cellular machinery to make more copies of itself. It actually will infect and hijack healthy human cells as a mechanism to spread its infection. The study found that carnosine blocks this “hijacking” process by quenching free radials produced by the virus. This suggests that a diet high in carnosine or supplementation could help prevent and possibly even stop the flu.
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