How Protein Supplements Support Immune Function and Fight Off Infections

Protein plays a critical role in immune system function. Amino acids, the building blocks of protein, are essential for the synthesis of antibodies, cytokines, and other immune system components. Without adequate protein intake, the immune system may be less effective in defending the body against infections.

One key amino acid, glutamine, is particularly important in immune function. It fuels immune cells like lymphocytes and macrophages, which are essential in fighting infections. Additionally, tryptophan is required to synthesize serotonin, a neurotransmitter that also influences immune responses. Low protein levels can impair the production of these immune-related molecules, weakening the body’s defenses.

Protein supplementation is especially important for those with increased needs, such as athletes, elderly individuals, and those recovering from illness or surgery. For instance, a study published in The American Journal of Clinical Nutrition found that protein supplementation helped improve immune responses in elderly individuals, reducing their susceptibility to infections . Similarly, research suggests that protein supplementation can help combat the negative effects of malnutrition, which often leads to a compromised immune system.

In times of illness or intense physical activity, protein supplementation ensures that the body has the necessary resources to fight off infections and recover. In summary, protein is vital for maintaining a robust immune system, and supplementing with protein helps enhance immune function, especially in individuals at risk of nutrient deficiencies.

1. Protein is essential for immune system function, supporting the production of antibodies, cytokines, and immune cells critical for defending against infections.
2. Amino acids like glutamine and tryptophan fuel immune cells and influence immune responses, with low protein levels potentially weakening the body’s defenses.
3. Protein supplementation enhances immune function, particularly for athletes, the elderly, and those recovering from illness or surgery, reducing infection risk and supporting recovery.

Reference:

Kelley KW, Weigent DA, Kooijman R. Protein hormones and immunity. Brain, behavior, and immunity. 2007 May 1;21(4):384-92.