Adaptogen
Rhodiola Rosea
Moderate EvidenceTwo systematic reviews rate the RCT evidence as moderate quality with limited replication; strongest results are for stress-related and mental fatigue.
Recommended Dose
300–400 mg standardized to 3% rosavins, 1% salidroside
Timing
Morning on empty stomach, before noon
Mechanism of Action
Rosavins and salidroside modulate cortisol and stimulate AMPK pathway. Inhibits MAO-A/B enzymes in vitro, a proposed basis for raised serotonin and dopamine availability. Enhances stress-resistant protein expression (HSP70).
Side Effects & Safety
Mild stimulation, dry mouth, or dizziness. May cause insomnia if taken late. Not recommended for bipolar disorder without supervision.
Do not use / talk to a doctor first
- Bipolar disorder / history of mania (without supervision)
- Pregnancy/breastfeeding — insufficient data
Interactions
Antidepressants (SSRIs/SNRIs) and MAO inhibitors
Theoretical serotonin excess — rhodiola inhibits MAO in vitro
Source: van Diermen 2009 (PMID 19168123); Mao 2015 (PMID 25837277)
Stimulants
Additive over-stimulation, insomnia
Source: Mechanistic
Blood-sugar / blood-pressure medication
Possible mild additive lowering — monitor
Source: Limited evidence
Pregnancy & breastfeeding
Insufficient human safety data — avoid during pregnancy and breastfeeding.
Who should avoid / see a doctor
Anyone on antidepressants, MAOIs or other psychiatric medication, people with bipolar disorder, and anyone pregnant/breastfeeding — get medical sign-off first.
Synergies
Used in These Stacks
See Rhodiola Rosea inside a full protocol — the stack pages cover when and why to combine it.
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References
- 1.Darbinyan 2000, Phytomedicine — Reduced the mental-fatigue index in healthy physicians on night duty (standardised extract SHR-5).
- 2.Olsson 2009, Planta Medica — 576 mg/day reduced stress-related fatigue and normalised the morning cortisol response (phase III RCT, n=60).
- 3.Mao 2015, Phytomedicine — Less antidepressant effect than sertraline but fewer adverse events — basis for the serotonergic/antidepressant interaction caution.
- 4.van Diermen 2009, J Ethnopharmacol — Methanol extract inhibited MAO-A ~92.5% and MAO-B ~81.8% at 100 µg/mL. (in vitro / preclinical)
- 5.Hung 2011, Phytomedicine — Systematic review of 11 RCTs: moderate-to-good quality but limited independent replication — supports the Moderate rating.
- 6.Ishaque 2012, BMC Complement Altern Med — Systematic review: some evidence for physical performance and mental fatigue, but methodological flaws limit firm conclusions.
