Impact
Moderate effect
Typical dose:500–2000 mg
Astragalus appears to enhance the activity of various immune cells, including T-cells and natural killer cells, improving the body's ability to fight off pathogens. It is best used for long-term prevention and building resilience rather than for treating acute infections.
- Focuses on
- Most relevant for
- People seeking to support immune health during medical recovery or periods of significant physical stress.
Potential benefits
- Immune Cell Modulation.Studies indicate it can help balance T-cell ratios and stabilize natural killer (NK) cells during periods of physical exertion or chronic illness.
- Support During Treatment.Research suggests Astragalus preparations may help maintain white blood cell counts and reduce infection rates in individuals undergoing treatments that suppress the immune system.
- Respiratory Support in Children.Unconfirmed. Limited evidence suggests specialized preparations might reduce the frequency of respiratory infections in children with certain chronic conditions, though quality is low.
Limitations
- General Prevention Uncertainty.Evidence is insufficient to prove that oral Astragalus alone prevents common colds or respiratory infections in otherwise healthy children or adults.
- Preparation Differences.Many clinical benefits were observed using intravenous injections or specific multi-herb combinations, which may not translate to standard oral capsules.
- Short-Term Side Effects.In healthy individuals, immune activation can cause temporary flu-like symptoms including fatigue, malaise, and mild headache.
Things to consider
May cause temporary headaches or fatigue during initial use. Consult a healthcare provider if you have an autoimmune condition, as Astragalus may stimulate immune activity.
Study evidence
16 studiesAstragalus can alter immune activity, and some clinical research suggests benefits in specific illness and treatment settings. The available evidence does not establish that an ordinary oral supplement strengthens immunity or prevents routine infections in otherwise healthy people.
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