Health Guide

Flat-stem milk-vetch

Flat-stem milk-vetch (Astragalus complanatus) is a distinct legume species native to Northern China, known in Traditional Chinese Medicine as 'Nan Sha Shen' or Southern Ginseng. Unlike the more common Astragalus root, this herb is harvested for its seeds, which are rich in unique flavonoids and polysaccharides. It acts as a powerful adaptogen, helping the body resist physical, chemical, and biological stress. It is particularly revered for 'nourishing the lungs' and balancing the immune response, making it a staple for respiratory health and natural energy.
Evidence BasedDietary Supplement
Flat-stem milk-vetch
VERIFIED SOURCE

Bio-Activity Analysis

Immune Modulation Activity

SCIENTIFIC DATA VISUALIZATION

Y-Axis
Bioactivity Score
Compound

Health Benefits & Sources

Why You Need It

  • Soothes Respiratory Tracts: Acts as a natural expectorant to help clear coughs and support lung health.
  • Balances Immunity: Stimulates immune cells to fight infection while regulating overactive immune responses.
  • Fights Oxidative Stress: High flavonoid content protects cells from environmental damage.
  • Supports Vitality: Acts as an adrenal tonic to help combat everyday fatigue.

Deep Dive

The efficacy of Flat-stem milk-vetch lies in its complex chemistry. It contains Astragaloside IV and various polysaccharides that interact with the immune system. Unlike stimulants (like caffeine), it works by improving the body's efficiency in handling stress. Studies show it increases the count of T-cells and NK cells, which are critical for viral defense. Furthermore, its 'lung-moistening' properties in TCM are backed by its ability to reduce inflammation in bronchial passages.

Natural Food Sources

Flat-stem milk-vetch is a specialized herbal supplement rather than a standard culinary ingredient. It is typically consumed as a powdered extract or capsule. However, to achieve similar immune-boosting effects through diet, focus on foods containing beta-glucans and flavonoids.

Supplementation

  • Dosage: 500mg - 1000mg of standardized extract daily.
  • Form: Look for 'Nan Sha Shen' powder or capsules standardized for polysaccharide content.
  • Cycle: It is often taken for 2-3 months, followed by a break.

Top Food Sources

Astragalus Complanatus Extract
Primary source (Seeds)
Lupini Beans
Rich in plant alkaloids/polysaccharides
Astragalus Membranaceus Root
Cousin herb (Huang Qi)
Reishi Mushroom
Similar immune beta-glucan profile
Mung Beans
Legume family relative

Frequently Asked Questions

No. Huang Qi is the root of *Astragalus membranaceus*. Flat-stem milk-vetch is the seed of *Astragalus complanatus*, known as Nan Sha Shen. They have different primary uses but are related.
It is a perennial legume native to Northern China. While possible to grow in temperate climates, harvesting the seeds for medicinal use requires specific agricultural conditions.
For immune support, effects are usually noticed after 2-4 weeks of consistent daily use.
Dosage must be significantly reduced. Consult a pediatrician or TCM practitioner for appropriate dosing for children.

Safety & Side Effects

Generally recognized as safe (GRAS) for most adults. Caution: Avoid if you are on immunosuppressant therapy (e.g., corticosteroids for autoimmune conditions) as it may counteract the medication. Consult a physician if pregnant or nursing. Do not use if you have a high fever or active infection without medical supervision.

Scientific References

  • [1]Zhang, H. et al. (2018). 'Astragalus complanatus: A review of its botany, phytochemistry, and pharmacology.' Journal of Ethnopharmacology.
  • [2]Li, R. et al. (2020). 'Immunomodulatory effects of Astragalus polysaccharides.' International Journal of Biological Macromolecules.
  • [3]National Center for Complementary and Integrative Health (NCCIH). 'Astragalus: In Depth.'