Astragalus (Astragalus membranaceus) vs Shilajit

Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.

Astragalus (Astragalus membranaceus)Shilajit
CategoryAdaptogensAdaptogens
Standard Dose250-500mg purified shilajit daily (standardized to >50% fulvic acid)
TimingMorning with warm water or milk (traditional Ayurvedic method). Can be split AM/PM.
Cycle DurationCycle 8-12 weeks on, 2-4 weeks off
Evidence LevelModeratemoderate_human

Mechanism

Contains cycloastragenol and astragaloside IV which activate telomerase (hTERT). Adaptogenic — modulates immune function, reduces inflammation, and supports cardiovascular health. Used in traditional Chinese medicine for Qi tonification.

Contraindications

  • Autoimmune conditions
  • Active cancer (telomerase activation concern)
B

Shilajit

Adaptogens

Mechanism

Shilajit is a mineral-rich exudate containing fulvic acid (60-80%), dibenzo-alpha-pyrones (DBPs), and over 85 minerals in ionic form. Fulvic acid acts as an electron shuttle in mitochondrial electron transport, enhancing CoQ10 function and ATP production. DBPs protect CoQ10 from oxidation, extending its functional half-life. Shilajit increases total and free testosterone by stimulating steroidogenesis and reducing SHBG. It also enhances mitochondrial membrane potential, acts as a potent antioxidant (fulvic acid neutralizes free radicals), and improves mineral absorption by forming bioavailable fulvic acid-mineral complexes.

Standard Dosing

250-500mg purified shilajit daily (standardized to >50% fulvic acid)

Timing

Morning with warm water or milk (traditional Ayurvedic method). Can be split AM/PM.

Cycle Duration

Cycle 8-12 weeks on, 2-4 weeks off

Side Effects

  • GI discomfort
  • Dizziness
  • Increased heart rate (rare)
  • Allergic reaction (rare)
  • Metallic taste

Contraindications

  • Hemochromatosis (iron content)
  • Active gout (may increase uric acid)
  • Sickle cell disease
  • Thalassemia

Best Stacking Partners

CoQ10 (synergistic mitochondrial support)AshwagandhaTongkat AliMagnesium

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