Outcomes

What rhodiola actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Sharpen focus and mental stamina Promising early signal

Concentrate longer, resist distraction, and stay mentally sharp through demanding tasks.

4 RCTs n=101 3–600 mg 1–4 wk #5/40

19016404·30450257·26464892·27069717

moderate

4 RCTs n=101

3–600 mg

1–4 wk

#5 /40

Ease depression symptoms Promising early signal

Lowers the weight of sadness, low energy, and emotional numbness over weeks.

2 RCTs n=97 340–1360 mg 4–12 wk #8/41

19016404·25837277

moderate

2 RCTs n=97

340–1360 mg

4–12 wk

#8 /41

Ease winter depression symptoms Promising early signal

Compensates for the sunlight deficit when days get short.

2 RCTs n=97 340–1360 mg 4–12 wk #6/39

19016404·25837277

moderate

2 RCTs n=97

340–1360 mg

4–12 wk

#6 /39

Ease depression tied to chronic pain Promising early signal

When pain loosens its grip, mood follows.

2 RCTs n=97 340–1360 mg 4–12 wk #6/39

19016404·25837277

moderate

2 RCTs n=97

340–1360 mg

4–12 wk

#6 /39

Reduce everyday fatigue Faint early signal

Less of that heavy, worn-out feeling that makes simple tasks feel like a chore.

5 RCTs n=323 3–800 mg 1–6 wk #8/44

24176010·25268730·26464892·39601362 +1 more

small

5 RCTs n=323

3–800 mg

1–6 wk

#8 /44

Improve everyday quality of life Not enough research

Fewer days where health problems dictate what you can and cannot do.

2 RCTs n=99 364–576 mg 4–6 wk

25268730·19016404

trivial

2 RCTs n=99

364–576 mg

4–6 wk

—

Outcome	Effect	Evidence	Dose	Weeks	Rank
Sharpen focus and mental stamina Promising early signal	moderate	4 RCTs n=101	3–600 mg	1–4 wk	#5/40
Ease depression symptoms Promising early signal	moderate	2 RCTs n=97	340–1360 mg	4–12 wk	#8/41
Ease winter depression symptoms Promising early signal	moderate	2 RCTs n=97	340–1360 mg	4–12 wk	#6/39
Ease depression tied to chronic pain Promising early signal	moderate	2 RCTs n=97	340–1360 mg	4–12 wk	#6/39
Reduce everyday fatigue Faint early signal	small	5 RCTs n=323	3–800 mg	1–6 wk	#8/44
Improve everyday quality of life Not enough research	trivial	2 RCTs n=99	364–576 mg	4–6 wk	—

Buy well

Recommended Rhodiola products

Real products that dose Rhodiola where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Rhodiola dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Risk profile

Adverse events and known drug interactions

Safety events

headache mild

Difficulty in falling asleep mild

Light sleep mild

Dizziness mild

Drowsiness mild

Pruritus mild

Dry hand mild

Abdominal distension mild

Drug interactions

Paroxetine major increases toxicity

Losartan moderate decreases concentration

Doxorubicin moderate decreases concentration

Apatinib moderate increases effect

Chloroquine moderate increases effect

Tilmicosin moderate decreases effect

Ceftriaxone minor decreases concentration

Co-studied with

Supplements that share evidence with rhodiola

Caffeine 22 shared outcomes · d=0.97

Sources

Generated August 14, 2026

Rhodiola

What rhodiola actually does, by outcome

Recommended Rhodiola products

Adverse events and known drug interactions

Supplements that share evidence with rhodiola

More evidence for Rhodiola

A Root for Harsh Places: How Rhodiola Turns Stress into Stamina—Sometimes in an Hour, Sometimes in a Month

The Yellow Flower Behind the Red Curtain: What Rhodiola Really Teaches Us About Stress, Stamina, and Subtlety

Best Supplements for Daily Stress Relief, Ranked by Clinical Evidence

Rhodiola for Fatigue and Physical Performance

Focus & memory: evidence map across 45 supplements

Caffeine

Rhodiola

Recommended Rhodiola products

More evidence for Rhodiola

NewA Root for Harsh Places: How Rhodiola Turns Stress into Stamina—Sometimes in an Hour, Sometimes in a Month

NewThe Yellow Flower Behind the Red Curtain: What Rhodiola Really Teaches Us About Stress, Stamina, and Subtlety

NewBest Supplements for Daily Stress Relief, Ranked by Clinical Evidence

NewRhodiola for Fatigue and Physical Performance

NewFocus & memory: evidence map across 45 supplements

NewCaffeine

A Root for Harsh Places: How Rhodiola Turns Stress into Stamina—Sometimes in an Hour, Sometimes in a Month

The Yellow Flower Behind the Red Curtain: What Rhodiola Really Teaches Us About Stress, Stamina, and Subtlety

Best Supplements for Daily Stress Relief, Ranked by Clinical Evidence

Rhodiola for Fatigue and Physical Performance

Focus & memory: evidence map across 45 supplements

Caffeine