Transfer Factor

Purported Benefits, Side Effects & More
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This information describes the common uses of Transfer Factor, how it works, and its possible side effects.
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What is it?

Transfer factors have not been shown to treat or prevent cancer.

Transfer factors are a group of proteins produced by cells of the immune system. Studies in humans are limited. Some suggest that transfer factors can be used to treat herpes, infections in children, chronic fatigue syndrome, and yeast infections. Other data suggest they may boost the immune system in patients with AIDS. However, more research is needed to determine the effects of transfer factors.

What are the potential uses and benefits?

  • To treat cancer
    Evidence is lacking to support use of transfer factors for cancer treatment.
  • To treat multiple sclerosis
    Evidence is lacking to support this claim.
  • To treat AIDS
    One study showed that transfer factors increased the number of white blood cells in patients with AIDS.
  • To treat viral infections
    Small studies suggest some efficacy in treating herpes.
  • To treat liver inflammation
    Transfer factors were not effective in treating hepatitis.
  • To treat asthma
    Some studies have shown that transfer factors do not benefit patients with asthma.
  • To treat chronic fatigue syndrome
    A pilot study suggests transfer factors may have positive effects on chronic fatigue syndrome.

What are the side effects?

  • Fever, tenderness, pain, swelling