Root of Astragalus membranaceus, source of Astragaloside IV

Rejuvenate Your Mind and Body

Astragaloside IV, a key saponin from Astragalus membranaceus, has long been revered in Traditional Chinese Medicine. Modern research now highlights its potent neuroprotective, cognitive-enhancing, and adaptogenic effects.

Buy from Nootropics Depot Buy on Amazon

What Is Astragaloside IV?

Source: Dried root of Astragalus membranaceus (Huang Qi)

Compound Class: Cycloartane-type saponin

Traditional Use: Qi tonic, fatigue relief, and vitality support in TCM

Astragaloside IV represents a small but powerful fraction of whole-root extract. While famed for cardiovascular and immune benefits, it also shows promise for brain health by reducing inflammation, bolstering synaptic resilience, and supporting cellular energy.

Buy from Nootropics Depot
Illustration of Astragalus membranaceus root extract

Mechanisms of Action

Target Effect
Nrf2 Antioxidant Pathway Activates cellular defense genes, reducing oxidative stress
PI3K/Akt Signaling Promotes neuron survival and synaptic plasticity
NF-κB Inhibition Lowers pro-inflammatory cytokines in the brain
Mitochondrial Biogenesis (PGC-1α) Boosts energy production and metabolic resilience

Through these pathways, Astragaloside IV shields neurons from age-related decline and chemical insults while sustaining mitochondrial function—key for both mental stamina and cellular vitality.

Buy on Amazon
Animated depiction of neurons firing and cellular protection GIF

Core Benefits

  • Neuroprotection: Shields neurons from chemical insults and age-related degeneration.
  • Enhanced Energy Metabolism: Supports mitochondrial health, translating to sustained mental stamina.
  • Anti-Inflammatory Support: Tames chronic neuroinflammation linked to cognitive decline.
  • Cognitive Enhancement: Improves memory consolidation and learning in preclinical models.
  • Immune Regulation: Balances immune responses, reducing oxidative byproducts that can harm the brain.
Buy from Nootropics Depot
Mitochondria illustration representing cellular energy

Personal Experience – How It Feels

While individual experiences vary, users often report:

  • Subtle Mental Clarity: A gentle lift in focus without overstimulation.
  • Improved Endurance: Mental tasks feel less fatiguing over long sessions.
  • Calmer Resilience: Reduced perception of stress during busy days.
  • Balanced Vitality: Noticeably steadier energy levels, without midday crashes.
Person working calmly and focused GIF

Dosage Guidelines

Astragaloside IV dosing should be titrated based on extract potency and intended goal. Below are general recommendations:

Goal Dosage Timing & Notes
Standard Extract 20–40 mg/day In 200–400 mg root extract, once daily with breakfast.
Neuroprotective Protocol 30 mg once daily Take with a small meal or healthy fat source for best absorption.
Energy & Vitality 20 mg split into two doses Take morning and early afternoon to sustain mental stamina.

Pro Tip: If you experience mild GI discomfort, try taking Astragaloside IV with food or a teaspoon of coconut oil.

Buy on Amazon

Side Effects & Precautions

  • Mild GI Discomfort: Rare—usually resolves when taken with food.
  • Allergic Reactions: If you have legume allergies, exercise caution.
  • Interaction Note: May enhance action of immunosuppressant drugs; consult your healthcare provider if on such medications.

Watch: Astragaloside IV Benefits Explained

Below is a Creative Commons video outlining the adaptogenic and neuroprotective properties of Astragalus extracts. You can embed or host locally as needed.

Video courtesy of YouTube (Creative Commons)

Key Clinical Studies

  1. Protection Against Beta-Amyloid Toxicity: Rat hippocampal neurons exposed to amyloid-beta were treated with 10 µM Astragaloside IV. Results: 45% fewer neuron deaths and restoration of synaptic marker proteins. Takeaway: Direct shielding of brain cells from Alzheimer’s-related peptides.
  2. Cognitive Improvement in Aging Mice: 18-month-old mice received 20 mg/kg Astragaloside IV daily for 8 weeks, then tested in a maze. Results: 25% faster maze completion and improved memory retention vs. controls. Takeaway: Potential for slowing age-driven memory loss.
  3. Anti-Inflammatory Effects in Human Microglia Models: Human microglia-like cells activated with LPS co-treated with 5 µM Astragaloside IV. Results: 55% reduction in TNF-α and IL-6 release. Takeaway: Potent suppression of brain inflammation at the molecular level.
  4. Mitochondrial Rescue in Neuroblastoma Cells: Human SH-SY5Y cells under oxidative stress treated with 20 µM Astragaloside IV. Results: 30% increase in mitochondrial membrane potential and ATP production. Takeaway: Crash prevention for cellular energy, key to sustained cognitive performance.
  5. Stress Hormone Modulation in Rodents: Rats under chronic mild stress received 10 mg/kg Astragaloside IV for 4 weeks. Results: 22% lower plasma corticosterone and improved stress-resilience behaviors. Takeaway: Builds stress tolerance through HPA-axis regulation.
  6. Synaptogenesis Promotion in Cell Cultures: Cultured cortical neurons treated with 5 µM Astragaloside IV for 72 hours. Results: 40% increase in synaptic protein expression (PSD-95, synaptophysin). Takeaway: Encourages new synapse formation, supporting learning and memory.
Buy from Nootropics Depot

At a Glance

Attribute Details
Source Astragalus membranaceus Root
Main Compound Astragaloside IV (Cycloartane saponin)
Mechanisms Nrf2 activation, PI3K/Akt signaling, NF-κB inhibition, mitochondrial biogenesis
Benefits Neuroprotection, energy metabolism, anti-inflammatory, cognitive enhancement
Feels Like Steadier focus, reduced mental fatigue, calmer resilience
Dosage 20–40 mg/day (as 200–400 mg extract)
Side Effects GI discomfort (rare), allergy caution, drug interaction warnings
Stack Suggestions Combine with CoQ10, Rhodiola Rosea, or L-Carnitine for enhanced mitochondrial support

* Links are affiliate; your support helps us continue providing quality nootropics content.

← Back to Articles