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Rhodiola rosea

Golden root / arctic root · Brain

LimitedLittle human data, early, small, or narrow.

An adaptogen with a small, mostly Eastern European literature suggesting it helps fatigue more than stress.

SHR-5
The standardized extract behind most positive fatigue trials

What it is

An arctic root used in Scandinavian and Russian traditional medicine, studied specifically for fatigue under stress rather than for energy in general. Its evidence is modest but unusually focused: it performs best in tired, stressed people doing demanding work, students in exams, physicians on night shifts.

How it works

Rhodiola's rosavins and salidroside appear to modulate the stress-response system and monoamine signalling. The practical framing that matches the trials: it does not add energy so much as blunt the fatigue that stress creates. That is why studies in already-rested people show much less.

Which form to buy

SHR-5 standardized extractTrial fidelity

The specific extract behind most of the positive fatigue trials, standardized to ~3% rosavins and ~1% salidroside.

Match this standardization if you want the studied product.

Generic 3% rosavin / 1% salidrosideThe common standard

The industry-standard ratio, mirroring the plant's natural profile.

Reasonable, check the label actually states it.

Unstandardized root powderLittle

Active content varies enormously, and adulteration with cheaper Rhodiola species is documented in this category.

Too variable to be meaningful.

What it actually does, graded

Reduces stress-related fatigueLimited

Several small RCTs in stressed students, night-duty physicians and burnout populations report positive signals, but a systematic review found contradictory results with every study at high or unclear risk of bias, and NCCIH still calls the evidence insufficient.

Improves mental performance under fatigueLimited

Some positive results on cognitive tasks in tired subjects; smaller and less consistent.

Mild depressive symptomsLimited

In a 57-person proof-of-concept trial, rhodiola showed a numerically smaller improvement than sertraline with fewer reported adverse events, but no group difference reached significance, and rhodiola did not significantly beat placebo either.

Physical/endurance performanceLimited

Mixed results; some acute studies positive, chronic ones largely not.

Energy in well-rested peopleNone shown

The trials are in fatigued populations for a reason.

Pros and cons

Pros
  • Aimed at a specific, common problem (stress fatigue) rather than vague wellness
  • Generally well tolerated and non-sedating
  • Trial doses are modest and affordable
Cons
  • Adulteration and species substitution are documented problems in this supplement category
  • Can be activating, evening dosing causes insomnia for some
  • Effects are modest; this is not a stimulant replacement

What to expect

  • The fatigue trials ran from a single acute dose up to several weeks, mostly measuring fatigue scales rather than sensations.
  • Taken late in the day it keeps some people awake, the activating side is real.

Interactions

CautionAntidepressants (especially MAOIs and SSRIs)Monoamine effects raise a theoretical serotonergic concern, prescriber conversation before combining.
MonitorStimulantsAdditive activation; jitteriness reported when stacked.
CautionBipolar disorderOne published rhodiola-associated mania case report exists (in a patient without an established bipolar diagnosis). Safety in bipolar disorder is simply unestablished, psychiatric input warranted.
MonitorDiabetes and blood-pressure medicationPossible modest additive effects.

Is it for you?

Probably worth it if
  • Genuine stress-driven exhaustion, shift work, exam periods, burnout stretches
  • You want a non-stimulant option and can accept a modest effect
Probably skip it if
  • You sleep well and want more energy anyway, that is not the population that responded

Who should avoid it

  • Anyone with bipolar disorder or on antidepressants, without psychiatric input

Research on this supplement

Papers about this supplement, not proof of the claims above. A title says what was studied, which is sometimes a negative result or a different question entirely.

  • The effect of Rhodiola rosea supplementation on endurance performance and related biomarkers: a systematic review and meta-analysis
    Front Nutr, 2025
  • Efficacy and safety of Rhodiola crenulata extract in the treatment of acute high altitude disease, based on studies involving populations in China: A systematic review and meta-analysis
    Front Pharmacol, 2025
  • Rhodiola rosea supplementation on sports performance: A systematic review of randomized controlled trials
    Phytother Res, 2023

What the evidence says

The better trials examine fatigue (in shift workers, students during exams, and burnout) and report modest improvements. Study quality is variable, samples are small, and much of the work comes from a narrow set of research groups, which is the same evidentiary shape as several Russian-institute compounds in this app. Promising is the honest ceiling.

What studies used

Trials commonly used 200-600 mg/day of standardised extract. Stimulating for some people; trials generally dosed earlier in the day.

Reported from published studies and product labelling — a record of what was used in research, not a recommendation. What is right for you is a conversation with a clinician.

Watch out for

  • Can be activating enough to disturb sleep
  • Standardisation varies widely between products

Evidence base

A1,550 research papers
established literature

Strong human evidence: either a phase 3 or 4 trial report alongside review-level evidence, or ten or more randomised controlled trial reports.

This letter measures how much human research exists, not whether it works for you — the tier above (Limited) is the read on quality.

Research (12)

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Where next

Every supplement in the catalogThe full shelf, grouped and evidence-tiered.→The compound indexSteroids, nootropics and research chemicals.→The peptide indexInjectable peptides and what trials used.→