Immunity/Heart/Inflammation

Astragalus

Traditional Chinese root herb that may support immune defenses and heart function in adults with recurrent infections.

Astragalus

Traditional Chinese root herb that may support immune defenses and heart function in adults with recurrent infections.

score

evidence

Caution

risk

Proven Benefits

01Reduces cold frequency

02May improve exercise tolerance

03May lower hs-CRP and IL-6

04May improve fasting glucose

05May support immune cell counts

Chemical Forms

Recommended

Astragalus membranaceus root extract standardized to polysaccharides or astragalosides
Astragalus root powder

Avoid

Unspecified 'Astragalus' blends without standardization
Aerial parts only (lower traditional and clinical support)
Cycloastragenol-only products (research isolate, not equivalent to whole-root products)

Expert Note

Standardized root extracts deliver more consistent levels of immune-active polysaccharides and astragalosides than unstandardized blends. Root powder can work but is less concentrated and more variable. Cycloastragenol is a single research compound studied for telomeres, not a substitute for whole-root astragalus.

Protocol

Amount

500-1000 mg

Frequency

Once or twice daily

When

With meals to reduce digestive upset.

Condition-Based Dosing

Standardized extract (polysaccharides/astragalosides)

500-1000 mg daily— Most capsule products use extract; this is the most practical starting point.

Dried root or tea/decoction

3-6 g daily— Traditional doses are higher because the material is less concentrated.

Safety & Limits

Upper Safe Limit

No established UL; short-term studies have used up to 5 g/day of dried root equivalent.

Cycling

Safe for continuous use

Contraindications

Autoimmune diseases (lupus, rheumatoid arthritis, MS) — theoretical risk of symptom flare from immune stimulation

Organ transplant recipients or immunosuppressant therapy — risk of reduced drug efficacy

Pregnancy or breastfeeding — insufficient safety data; avoid unless supervised

Synergies

Vitamin C

Vitamin C supports epithelial barriers and immune cell function; paired use may offer complementary seasonal immune support.

Zinc

Zinc is required for immune signaling and may act synergistically with astragalus polysaccharides.

Avoid Combining With

✕Immunosuppressant medications like corticosteroids or cyclosporine (may theoretically reduce drug efficacy)
✕Heavy alcohol use (may blunt immune response)

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