Eleuthero (Siberian Ginseng)
The original 'adaptogen' — the herb that gave the category its name. Mild stimulant-free energy support and immune resilience under chronic stress.
Moderate evidence for reduced fatigue, improved exercise tolerance under chronic load, and immune support (especially in upper respiratory infections). Effects: 2–4 weeks.
Eleutherococcus senticosus is a shrub from northeastern Asia. It's not technically a true ginseng (different genus), but Russian researcher Israel Brekhman coined the term 'adaptogen' studying it in the 1960s. It's the gentlest of the energy adaptogens — non-stimulating, slow-onset, modest effects. Used by Soviet athletes, cosmonauts, and shift workers for stamina under chronic stress. Less acute punch than rhodiola or panax ginseng, but easier to take long-term without the overstimulation risk.
- Form
- Standardised extract to ≥0.8% eleutherosides. Look for products specifying eleutheroside B and E content.
- Dose
- 300–1,200 mg/day standardised extract.
- Timing
- AM or early afternoon. Not PM.
- Schedule
- 6–8 weeks on, 2 weeks off — to prevent adaptation.
- Side effects
- Generally well-tolerated. Insomnia (if taken PM), mild GI upset, headache. Rare hypertension at high doses.
- Interactions
- Anticoagulants — mild additive. Diabetes medications — modest glucose effects. Digoxin — case reports of elevated levels. Sedatives — opposing effect.
- Contraindications
- Uncontrolled hypertension. Bleeding disorders. Pregnancy / breastfeeding. Hormone-sensitive conditions (mild estrogenic activity).
- Lab markers
- Not standard. Subjective energy / fatigue tracking.
- Food sources
- Not in everyday food — extract only.
Pairs with
Rhodiola, ashwagandha in broader adaptogen stacks. Astragalus for immune support.
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