Immune Support Protocol

This bundled product contains the following items:

The immune system requires a balance of vitamins, minerals, and nutrients to eliminate and protect against foreign pathogens, antigens, bacteria, and more. Nutritional deficiencies weaken the immune system and prevent it from mounting an appropriate response toward invading toxins. PureBulk’s Immune Support Protocol provides essential vitamins, minerals, and supplements that strengthen and support the immune system.

Best Vitamins for the Immune System

Vitamins and minerals serve a plethora of functions in the body. Some have a direct effect on the immune system by acting as an antioxidant, playing an anti-inflammatory role, acting as an antibacterial agent, and more.

Ascorbic Acid Powder

Ascorbic acid powder is a water-soluble form of vitamin C and a potent antioxidant. It’s an essential vitamin that the body needs to survive but cannot produce innately. Ascorbic acid powder stimulates the production of white blood cells knowns as leukocytes and enhances their function within the immune system. Vitamin C stimulates both the innate immune system and the adaptive immune response. It promotes the rapid increase of lymphocytes—a type of leukocyte that includes natural killer cells, T cells, and B cells. Natural killer cells are the backbone of the innate immune response individuals are born with that evolves over time. T cells can respond to new invading antigens, recognize and eliminate previously encountered pathogens, and regulate the immune response. B cells provide humoral immunity by producing antibodies and antimicrobial peptides.

Vitamin D3 (5000IU) Softgels

Vitamin D3 supplements support the immune system by activating the body’s natural defenses and acting as an immunoregulator. It enhances the immune system’s ability to defend against pathogens by improving T cell function. It also stimulates macrophages—a type of leukocyte that surrounds and kills pathogens. The immune system struggles to perform without adequate vitamin D, and low levels of this vitamin increase individuals’ susceptibility to infections and illnesses. Vitamin D deficiencies also impair lung function and reduce the body’s ability to combat respiratory illnesses.

Vitamin D3 is fat-soluble and requires a fat source for maximum absorption. While individuals can take vitamin D supplements with meals to achieve this result, research shows that taking vitamin D with a carrier substance like oil dramatically outperforms other methods of supplementation. PureBulk’s vitamin D3 softgels use olive oil as a carrier. Many other D3 supplements use inferior carriers, such as corn, safflower, or soybean oil. Olive oil is a true fat, whereas corn and soybean oil are only fatty structures. Olive oil also synergizes with vitamin D to reduce inflammation and oxidative stress. Additionally, research shows that olive oil enhances vitamin D absorption from dietary sources fortified with vitamin D.


Zinc performs several functions in the body. It’s one of the most abundant minerals found in the body and is a cofactor for over 300 enzymatic functions. It is critical for the formation of SuperOxide Dismutase (SOD)—an enzyme that plays an integral role in the body’s antioxidant immune defense. It’s acts as an immunoregulator and is essential for the immune system to function properly. Research has shown that it also reduces the duration of the common cold and its symptoms. It also possesses anti-inflammatory properties and reduces oxidative stress. Zinc is essential for both the innate and adaptive immune response, and zinc deficiencies increase the likelihood of developing infections.

Best Supplements for the Immune System

Quercetin Supplement

Quercetin is a powerful antioxidant that protects cells and inhibits oxidative stress by scavenging free radicals. It also has anti-inflammatory, anti-viral, and antimicrobial properties that support the immune system. It acts synergistically with zinc to further enhance immune function. Zinc cannot easily transfer between cells, but quercetin acts as an ionophore that facilitates zinc transport.

Melatonin and L-Theanine Supplement

Melatonin acts as an immunomodulator by enhancing the function of the innate and adaptive immune systems. It has antioxidant properties and enhances the formation of SOD antioxidants. It prevents oxidative damage caused by hydroxyl radicals, oxygen-based free radicals, and reactive nitrogen species (RNS). It also stimulates the immune response against bacterial and viral infections. Individuals should take melatonin before bed, as it plays a role in sleep regulation.

L-Theanine is an amino acid that has a similar structure to glutamate and glutamine. It’s found in high amounts in tea leaves from the Camellia sinensis plant, including black, green, and white teas. Green tea has the highest concentration of theanine and is responsible for green tea’s umami flavor. It is the primary amino acid found in green tea plants, accounting for up to 50% of its total amino acid content.

L-Theanine promotes relaxation by increasing alpha wave frequency. Alpha waves are strong indicators of a relaxed, stress-free mind. L-Theanine also helps relieve tension in high-stress-response adults by attenuating the physical bodily reactions to stress. Theanine has a calming effect on individuals experiencing mental stress as well. Chronic stress damages the immune system, suppressing both cellular and humoral immunity. Short-term stressors, such as taking an exam, also suppress cellular immunity. Stress also triggers inflammation that disrupts how well the immune system functions.

Restorative sleep is essential for immunoregulation and forming immunological memories. Excess stress can make it difficult to fall asleep or stay asleep. The combination of melatonin and l-theanine helps combat the negative effects of stress and interrupted sleep on the immune system.


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